Home

Installjac

1. SUN Ley OO ENE ly Spay LEDO 10 05 00 INE 1 6 1 5E6 100 0 LENE Ly Vy DEA 1000 JINE peep DE 100 40 FINI SLND ep os dp ge DOO LINE O eE EQO 50 JINE Or ADE TODO JINE o Brar ADO 100 0 JINE Big L556 10050 FINI SiN 2D DO LINE Dye LIDO 1000 JINE i O54 p gt Ls SEG 1 0050 LINE a Chip AI 61010530 JINE p84 Le SEG 1000 FINI SIN pee 300 0 LINE pyre DB 0020 JINE A rr ADE TO0070 INE po brrr MADE LOOTO INE p18 LE 0050 LINE Card The LINE cards define linear elastic cables They run from the corners of the structure to the crane hook The program applies a force to the jacket when the distance from the attachment point to the hook is greater than the length of the cable The amount of force that it applies is proportional to the difference in the stretched and unstretched lengths of the cable The stiffness factor determines how much tension is in the cable for unit stretch Typically we use a stiffness factor between one and two million This is more elastic than most real cables but compensates for a problem that occurs when the program calculates forces for very stiff cables The only other value that we enter for a cable besides the attachment point is its unstretched length You should base the length of the cable on a number of factors e What cables does the company that is installing the jacket have avai
2. Node and element names must have been defined before being referred to on an input card The node and element names must identify nodes and elements of the T FEM file The input cards are translated and node and element names are converted to num bers The translated cards are printed to a new file that is read by the core part of Installjac Translated cards with node numbers JLTA 2731 3051 SESAM Installjac Program version 8 1 10 June 2010 35 JLTB 3841 3531 Translated cards with element numbers CTRL OPEN 1 1 1100 70 244 GTRE CLOS 1 Lg 1100 70 244 Node names may be applied on input cards containing node references This includes the following card types AXIS BLTx CTRL TUBE VTUB ETUB SMEM OPND CLND CWIN FORC HBNx JTLx LINE NODx NLIN NSEx STRE Element names may be applied on input cards containing element references without node references to identify the element This includes the following card type CTRL OPEN CLOS For further details see Chapter 10 Description of Installjac Cards Note that node and element names apply for nodes and elements of the T FEM file model only and not for nodes and elements created in the Installjac input files An Installjac input card may contain references to a mix of user defined nodes and T FEM file nodes In such a case the T FEM file nodes may be referred to by node names and the user defined nodes by node numb
3. Figure 3 8 FRA Coordinate Space Example 0 to 1 in all directions Element Types Installjac recognizes eight types of elements Tubes TUBE Tubes are the main elements used to describe a jacket They can also be used in the barge description but other elements are usually more suitable Spheres SPHE Spheres are usually used to model buoyancy tanks on jackets They can also be used on barges but again other elements are usually more appropriate Triangular Plates TRIA These elements are used primarily to model mud mats They provide added mass and drag but have no structural mass and do not contribute to the hydro static properties of a structure Circular Disks DISC Disks are used to model the end effects of tubes that do not join other tubes at either end They provide drag added mass and slam forces along the axes of tubes They have no structural mass or hydrostatic properties Trapezoidal Plates TRAP These plates are used to model the hydrodynamic forces of added mass and drag on a barge and are generated internally by the program Prismatic Elements PRIS Prismatic Elements model the hydrostatics of a barge and have no other forces SESAM Program version 8 1 3 5 3 Installjac 10 June 2010 25 acting on them Point Masses PMAS Any part of a structure where the mass needs to be modeled can be entered as a point mass Point masses are usually used to define the structural mass and inertia for a barg
4. 10 77 10 78 10 79 e11 11 1 11 1 1 11 1 2 11 1 3 11 1 4 112 11 2 1 11 2 2 Table of Contents Rocker Arm Mass Card RAMS Vuasiiatiaii iaa 197 Rocker Arm Cross Section Card RAXS ooococcnccnconnnonnnnnonccnononannonononcncononnonononcnnaninnnnns 198 Rocker Dimension Cards RDXX cccccsscsscccecesessensececesecesensnsececesecsesesensaaeeeseceeeeeenens 200 Restraint Card RELE al tan iatien clan Meanie aie 201 Restart Card RESTART i3siees Sai a AO 202 Rocker Arm Description Cards R PINK 25 00 hie dica 204 Reynolds Number Scale Card SCV it A vitae ieseaeandenee as ead aaancoate 206 Slam Multiplication Factor Cards SUMX c cc ceeccessscecssceceeeeeceeeeeeseeeceeeeecneeeecnteeeenaes 207 Sling Assembly Card SEN arista id i EEEE SE ESEE EEEE geass 208 Stability Report Card ST Rx and S UR Vii di 211 Structural Tube Element Cards STRE XYZSTRE ccccccccccccssssssceceeeeeeeessnseaeees 213 Time Parameters Card TIME ooocccccnnnonnonnnononcnncnnnnononononcononnnnn no nonnnonnononanonononocnononnnnns 215 Title Cards MITE ainia diana 216 Debugeine Card CURA CE sae tse a E i oE E E S EEE io 217 Starting Velocities Cards VELXx usina ii renato 218 Wave Definition Card WDEB oooooonnnncncnnnonononanononocnononananononconononnnononononnononnnnononononccnons 220 Winch Cardi WN CAI etica 221 Wave Paradis A RS 222 Element Name Cards XYZELB cconnonnnonnnnnononinnnnannnnnonnononnnnnno nono
5. 2 Make sure that the buoyancy of the structure is greater than its weight SESAM Installjac Program version 8 1 10 June 2010 81 8 Jacket Equilibrium Before Upending 8 1 Why The second task in upending a jacket is to find the equilibrium position of the jacket You run this task to 1 Verify that the structure floats and is sufficiently stable in its free floating posi tion 2 Determine if the trim of the structure is correct for the upending sequence 8 2 When Run this task e After verifying that the structure is correctly coded with a FLOAT Data run See Checking a Jacket before Upending or e After analyzing a single structure during a launch See Analyzing a Jacket after Separation Although you can run this task as part of an upending sequence it is better to do this simple analysis before the more complicated upending sequence to ensure a satisfac tory starting point 9 3 Getting Ready Before you begin this task e The reserve buoyancy of the jacket should be about ten percent 10 of the jacket weight 8 4 Task Outline This outline assumes that you are using structure data from the RESTART 1 file cre ated by a Data run even though input for this task and the necessary previous tasks could also have been contained in one file During this task you will Enter card data that defines starting position of the jacket When you execute the program it 1 Vertically rotates and translates
6. CTRL TUBE 1 2 3 4 10 CTRL FINI CTRL TUBE 1 2 7 3 4 15 9 5 5 Defining the Processing Steps EQON cards tell the program the order in which to evaluate different crane heights and flooding sequences You can enter up to twenty five 25 EQON cards Each EQON card can tell the program to e Evaluate a number of flooding sequences for a given crane hook load e Evaluate a number of crane hook loads for a given flooding sequence In the following example the first EQON card tells the system to evaluate the equilib rium position of the structure for the first three crane positions and the first flooding sequence The program first calculates the equilibrium position when the crane hook is at the water surface and no members are flooded Next it raises the crane to 50 feet and recalculates the equilibrium position The third record that the program will output will show the equilibrium position when the crane hook is at 150 feet SESAM Program version 8 1 EQON CARDS EQON 1 3 1 EQON 3 7 2 3 EQON 5 4 4 CRANE POSITIONS SIN DO INES 1 Dis 12 5E 6 100 INE Ay barre soho 100 WINE Lo Tyee LiDEG 1 00 INE 1 8 1 5E6 100 FINI SIN py ype 50 50 LINE e Opp Le DEG 100 INE 1 6 1 5E6 100 JINE e Tiare Le SEG 100 INE 1 8 1 5E6 100 FINI SL
7. Member Name AS Enter the name that was used on the VTUB card to name the member Note If the field on the VTUB card was left blank then the valve member name will be VM001 VMO002 etc The zeros in the name must be included SESAM Installjac Program version 8 1 10 June 2010 121 31 40 Time F10 0 Enter the time at which you want the valve to open close The default is 0 0 Note Although any time may be specified the valves are opened closed at the beginning of each time step e g if the time step is one second and the simulation started at 0 0 seconds then a valve open close time of 1 5 seconds will mean that the valve will not be opened closed until a simulation time of 2 seconds Installjac SESAM 122 10 June 2010 Program version 8 1 10 15 Supermembers CTRL SMEM XYZCTRL SMEM These cards are optional and valid for LAUNCH only The supermembers are new and have the following user input description Supermember Card Use these member cards to specify the ADDITIONAL tubes which make up a super member These cards follow a valve flooded tube members card VTUB Supermembers are composed of a series of continuous structural members which may have different inner diameters and material properties Note End cuts on the GEOM cards will not be allowed for members making up a supermember GEOMETRIC continuation cards will be ignored for supermember cards There are no conical tapered sections for supermembe
8. This field is used in one of three ways 1 Leave the field blank if you are not running multiple crane hook or control flooded member cases 2 Leave the field blank if you are running multiple crane hook load cases 3 Enter the last control flooded member case to run when analyzing multiple control flooded member cases See Multiple Control Flooding Analysis Example in the FINI card Blank Blank Blank X Restraint Vector Component Projected length of rotation vector along X axis of the Local System Axes LSA for the jacket The default is 0 0 dimensionless Y Restraint Vector Component Projected length of rotation vector along Y axis of the LSA for the jacket The default is 0 0 dimensionless Z Restraint Vector Component Projected length of rotation vector along Z axis of the LSA for the jacket The default is 0 0 dimensionless Installjac 137 I5 F10 0 F10 0 F10 0 Installjac SESAM 138 10 June 2010 Program version 8 1 10 27 Drag Force Calculation Limits Card ERRL The ERRL card is concerned with the efficiency of the program in calculating the vis cous drag forces on TUBE elements This card is required and valid only for LAUNCH The drag forces on TUBE elements are derived from the rotational plus the translation velocity of the element relative to the surrounding water The drag force analysis splits the velocity into two components 1 The translational velocity at the mid
9. 4 8422m Now look at the roll position of the barge center of gravity COG It should be zero 0 0 A negative number means that the barge is listing to starboard Conversely a positive number would mean that the barge is listing to port The yaw value should be zero 0 0 also A positive yaw value means that the stern has moved to starboard Installjac SESAM 56 4 8 10 June 2010 Program version 8 1 Plotting the Equilibrium Position Equilibrium is achieved when the both the jacket and barge velocities are equal to zero X Y plotting of the velocity and displacement components are done in Xtract not implemented yet as of version 1 5 0 Variables plotting can also be done in spread sheets using the data contained in the vtf plot file See the examples in Chapter 11 for illustrations You are now ready to move on to the third task Launching a Jacket SESAM Installjac Program version 8 1 10 June 2010 57 5 5 1 5 2 5 3 Launching a Jacket Why The third task simulates the behavior of the structures as the jacket slides off the barge The main thing that we learn from this task is how stable the structures are during the launch We are verifying that we won t sink the barge We are making sure that the jacket will slide off the barge not roll off the side of the barge stop sliding lift off the barge etc When Run this task after verifying that the barge and jacket combination are in a suitable lau
10. BARGE NODES NODE 500 0 0 0 0 12 0 NODE 501 0 0 0 0 0 0 NODE 502 92 5 0 0 12 0 NODE 503 185 0 0 0 0 0 NODE 504 185 0 0 0 12 0 BARGE TRACK NODES NODE 505 185 0 10 0 14 5 NODE 506 0 0 10 0 14 5 NODE 507 185 0 37 0 14 5 NODE 508 0 0 37 0 14 5 BARGE POINT MASS PMAS NODE NODE 990 92 5 23 5 6 0 ok ok KKK MATE 999 29600000 BARGE MASS SI xx m r2 m y224 z02 etc y 47 z 12 mom mass of inertia about x axis EARE Ixx Ixy Ixz Iyy Iyz Izz GEOM PMAS 999 5 08E9 6 558E7 4 485E8 4 937E10 3 298E6 5 3666E10 BARGE GEOM GEOM PRIS 1111 47 B ARGE MASS AS POINT MASS GEOMETRY AS PRISMS NSE2 PMAS 990 999 999 NSE2 PRIS 501 503 500 1111 NSE2 PRIS 504 500 503 1111 FLUID PROPERTY AND ACC DUE TO GRAVITY FLPR 114 0 1025 0 ACCG 9 81 B ARGE AND JACKET TRACK NODES BLT1 505 506 BLT2 507 508 JLT1 236 23 JLT2 251 38 ROCKER ARM 2 IN NUMBER COORDINATES AND PROPERTIES RPN1 5 000 25 000 20 000 RPN2 1 500 10 000 70 000 RELF 1 E29 1 E29 WNCH FRIC 1000 000 1000 000 STARTING POSITIONS OF BARGE AND JACKET POS1 25 440 POS2 0 0 0 0 0 8 0 0 3 0 0 0 TIME INT PARAMETERS NO OF INC TIME INC INITIAL RECORD NO START TIME TIME 30 0 500 0 000 PRINT EVERY TIME STEP AND NODE 452 RESULTS PREV 1 NOD1 452 Fig 11 3 Co
11. DNY SESAM USER MANUAL Installjac Jacket Launching and Upending DET NORSKE VERITAS SESAM User Manual Installjac Jacket Launching and Upending June 10th 2010 Valid from program version 8 1 Developed and marketed by DET NORSKE VERITAS DNV Software Report No 634 2002 Revision 7 June 10th 2010 Copyright O 2010 Det Nor ske Veritas All rights reserved No part of this book may be reproduced in any form or by any means without permission in writing from the publisher Published by Det Norske Veritas Veritasveien 1 N 1322 H vik Norway Telephone 47 67 57 99 00 Facsimile 47 67 57 72 72 E mail sales software sesam dnv com E mail support software support dnv com Website www dnv com If any person suffers loss or damage which is proved to have been caused by any negligent act or omission of Det Norske Veritas then Det Norske Veritas shall pay compensation to such person for his proved direct loss or damage However the compensation shall not exceed an amount equal to ten times the fee charged for the service in question provided that the maximum compensation shall never exceed USD 2 millions In this provision Det Norske Veritas shall mean the Foundation Det Norske Veritas as well as all its subsidiaries directors officers employees agents and any other acting on behalf of Det Norske Veritas 1 1 1 2 1 3 1 4 1 5 16 1 7 1 7 1 1 7 2 1 8 1 9 1 9 1 1 9 2 2 1 2
12. FRIC 0 05 0 07 0 0 Installjac SESAM 242 10 June 2010 Program version 8 1 RELF 0 0 00 0 0 POS1 0 0 POS2 0 0 0 0 5 2917 0 0145 2 3999 0 0 TIME 2000 0 500 0 000 DRG1 1 0 DRG2 1 0 AMS1 1 0 AMS72 1 0 PREV 10 NOD1 925 962 CTRL TUBE 121 1221 999 0 0 75 0 TIME 58 0 750 CTRL TUBE 101 301 999 0 0 75 0 TIME 58 0 750 CTRL TUBE 124 324 999 0 0 75 0 TIME 58 0 750 CTRL TUBE 104 304 999 0 0 75 0 TIME 58 0 750 CTRL TUBE 1216 1021 999 0 0 75 0 TIME 58 0 750 CTRL TUBE 111 311 999 0 0 75 0 TIME 58 0 750 CTRL TUBE 122 1234 999 0 0 75 0 TIME 58 0 750 CTRL TUBE 102 302 999 0 0 75 0 TIME 58 0 750 CTRL TUBE 1016 4015 999 0 0 75 0 TIME 58 0 750 CTRL TUBE 114 3046 999 0 0 75 0 TIME 58 0 750 CTRL TUBE 112 312 999 0 0 75 0 TIME 58 0 750 CTRL FINI Figure 11 15 Input for the launching analysis comma separated format Figure 11 16 The jacket sliding off the barge during the launching analysis SESAM Installjac Program version 8 1 10 June 2010 243 Figure 11 17 Jacket starts tilting to the vertical at time 750
13. JACKET STATIC ON BOTH BARGES wee THIS IS A COMMENT LINE Building Structures The jacket is usually modelled using Preframe However both the barge and jacket structures can be modelled using the following Installjac cards NODE Node Coordinate Cards STRE Structural Element Cards NSE Non structural Element Cards MATE Material Properties Cards GEOM Geometric Properties Cards HBW Barge Width Cards HBN Barge Sides Cards A jacket is composed of a series of elements connected at nodes The nodes are points in a Cartesian coordinate system You enter coordinates using a series of node coordi nate cards The elements that connect the nodes are defined on STRE and NSE cards The STRE cards define the majority of the tube elements that make up the jacket These are structural elements The program can generate loads for structural ele ments You can define other types of elements such as point masses and mud mats on the NSE cards You define a barge using elements that describe both its hydrostatic and hydrodynamic properties NSE cards entered in a particular way describe the hydrostatic properties of Installjac SESAM 22 10 June 2010 Program version 8 1 a barge HBW and HBN cards describe its hydrodynamic properties The Material Properties MATE cards describe the material that the elements are made of The Geometric Properties GEOM cards describe their geometric data such as their diameter thickness or length 3 5 2 1 En
14. SESAM Installjac Program version 8 1 10 June 2010 9 15 WAVE Wave Definition and Forces WDEF WDEF L ADDM ADDM DAMP DAMP DIFF DIFF DIFM DIFM 1 9 1 9 1 Table 1 1 Options groups and comparisons to old options About Version 8 0 and Later Versions Two main features are introduced in Versions 8 0 Name concepts for nodes and elements Brace connections flushed to chord tube surfaces by means of element eccentricities Name Concepts Nodes and elements of the FEM file model are referred to by node and element num bers in the Installjac input files When a rerun of Genie takes place however the node and element numbers are completely changed and the Installjac input must be updated to the new numbering of the FEM file model This update is performed manually and is cumbersome and tedious to execute Name concepts for nodes and elements have been implemented into Installjac to han dle the renumbering problem of the FEM file model Nodes and elements are identified by names which are applied in the Installjac input The names are defined once and do not change when the node and element numbering of the FEM file model change The node names are defined with the coordinates of the nodal points The node num bers are related to the node names by comparing the coordinates of the node names with the nodal point coordinates of the FEM file model Element names are defined with node names of the element no
15. e The rocker pin reaction Note Barge owners publish information about the above three parameters e Depth of the dive of the jacket e The velocities of the jacket and barge e Time it took to separate Time History Report This report shows the position forces and moments at the center of gravity in each of the six degrees of freedom for both structures at each timestep We can use this report to check the six items listed above Checking the Trim of the Barge You can use the position information for the barge to determine the trim of the barge It is easiest to use if you coded the nodes for the barge using a right hand coordinate sys tem where the positive X direction is toward the stern of the barge The following dis cussion assumes that the barge is coded that way Until the jacket slides off the barge the pitch of the center of gravity position of the barge should be positive Refer to the following example This means that the bow is SESAM Installjac Program version 8 1 10 June 2010 63 raised A negative number would mean that the bow is down Also look at the rocker pin heave position It should be negative The barge owners can give you specifics about the barge characteristics Please note that the owners usually describe trim as a percent slope of the deck This program uses degrees instead of percent slope Usually you will not want the angle of the barge deck to exceed four 4 degrees 5 6 2 2 Checking the D
16. Enter a value of horizontal velocity of the hard point below which the static value of friction should be used in value from 0 0 to 9999999999 If the horizontal veloc ity of the hard point is above this value then the dynamic friction value is used This entry is valid for LAUNCH only The default is 0 0 feet sec English or meters sec Metric Note If this field is left blank the dynamic coefficient of friction will always be used 71 80 Pull Out Force F10 0 Enter a value which represents the vertical force needed to pull out a hard point after contact has been made with the sea bed in a value from 0 0 to 9999999999 This entry is valid for LAUNCH only The default is 0 0 pounds English or newtons sec Metric Installjac SESAM 158 10 June 2010 Program version 8 1 10 38 Buoyancy Multiplication Factor Cards HYDx This card is required Use it to modify the buoyancy of a structure If this card is not entered the Buoyancy Multiplication Factor defaults to 1 0 Columns Entry Description and Variable Name Format 7 10 HYDx A4 Enter the word HYDx x Structure Number below Structure Identifier Enter the number 1 2 or 3 of the structure that you want to set the starting positions for 11 20 Buoyancy Modification Factor F10 0 The buoyancy of the structure will be multiplied by the number you enter here SESAM Installjac Program version 8 1 10 June 2010 159 10 39 Jacket Track Cards JLTx XYZ JLTx
17. I ly Acceleration of gravity is set on the ACCG card and I are mass moments of inertia Maximum Movement Increment for 0 F10 0 Installjac SESAM 168 10 June 2010 Program version 8 1 Enter the maximum movement increment for the X degree of freedom 6 The default is 1 432 degrees 0 025 radians degrees 61 70 Maximum Movement Increment 9 F10 0 Enter the maximum movement increment for the Y degree of freedom 0 The default is 1 432 degrees degrees 71 80 Maximum Movement Increment 0 F10 0 Enter the maximum movement increment for the Z degree of freedom 0 The default is 2 290 degrees degrees SESAM Installjac Program version 8 1 10 June 2010 169 10 46 Multiple Rocker Arm Property Cards MRPx This card is optional and used for side launches only Use the MRP cards to define rocker arm properties when launching a jacket off the side of a barge For a side launch The barge can have up to 10 rocker arms e Each rocker arm has a specific static dynamic coefficient of friction e The jacket is free to yaw during launch e The jacket activates all rockers simultaneously e The elastic behavior of the jacket barge combination is simulated by assigning a specific load distribution to the rockers This distribu tion is based on the constraint normal reaction load at the rocker plane Refer to the FRIC card for a more detailed explanation of dynamic and static friction coefficients Columns Entry
18. Joint_40016 XYZELE Ele_70 Joint_48 Joint_34 ID XYZELE cards given in Installjac input files The XYZELE cards may be given in the Installjac input file well as for restart runs a Positioning run In the positioning run the XYZELE cards must be included i conversion card When reading the input file element names and related node XYZELE cards are written as comment cards to the final which is used in the further execution of Installjac Example for the positioning run as n the input file for other data not generated from FEM files specified with the OINP option on the FEM file names are stored and the input file AINP option XYZELE cards included in input file Installjac_Command inp XYZELE Ele_412 Joint_40017 Joint_40018 SESAM Installjac Program version 8 1 10 June 2010 225 XYZELE Ele_1100 Joint_817 Joint_624 XYZELE Ele_412 Joint_40017 Joint_40018 XYZELE Ele_1100 Joint_817 Joint_624 b Restart runs When reading the restart input file element names and related node names are stored and the XYZELE cards are written as comment cards to a new file with the name restartl inp or restart2 inp for restart 1 or restart 2 run respectively The new file con tains translations of element and node names and is used further in the execution when Installjac reads input information Example Restart input f
19. LAUNCH amp FLOAT VTUB LAUNCH only VTOL LAUNCH only OPVL LAUNCH only CLVL LAUNCH only SMEM LAUNCH only You can define a control flooded TUBE between any two nodes of the structure The control flooded TUBE elements are independent of the structural members defined in STRE and NSE cards For the EQON analysis the metacentric heights are based on the fixed mass of the structure calculated from structure data Also the properties of the cut water plane area are modified to include the destabilizing effect of the fluid ballast See Multiple Con trol Flooding Analysis Example in the FINI card description for examples of coding these cards Columns Entry Description and Variable Name Format 7 10 4 10 CTRL XYZCTRL A4 A7 Enter the word CTRL or XYZCTRL 12 15 TUBE A4 Enter the word TUBE 16 20 Structure Identifier I5 default is Jacket i e 1 21 25 1st Node I5 A16 Enter the first node number node name of the element Installjac SESAM 114 10 June 2010 Program version 8 1 26 30 2nd Node 15 A16 Enter the second node number node name of the ele ment 31 35 Blank 36 40 Material Group I5 Enter the material group number of the element Material groups are specified on MATE cards Note If the material group number is omitted by the user a material of the density of the seawater will be used by default The density on the MATE card should be approximately that of seawater If 1t is greater than 10 of
20. N U 18 6 Gravity T 19 6 Wave Inertia 8 3 Nodal Positions 20 6 Total Crane Hook 9 2 Crane Hook Number 21 6 Total Ballast 0 1 Tension in Line 22 6 Rocker Pin Reaction 23 6 Track Winch Forces 24 6 Error Per Timestep 2d 6 Total Force w DD 1 Clearance SESAM Program version 8 1 10 June 2010 Installjac 193 2T 1 Wave Height at Origin 28 6 Hinge Reactions Local 29 6 Hinge Reactions FRA 30 6 Lead Barge Jacket Forces RPA 31 Rocker Arm Forces 34 35 36 37 38 39 40 41 42 43 44 45 4 Valve Member Summary 46 4 Valve Flow Pressure 2 47 3 Nodal Position 48 3 Nodal Velocity 49 3 Nodal Acceleration 50 1 Individual Mooring Tensions Installjac SESAM 194 10 June 2010 Program version 8 1 Ref Available Parameters Default Settings No Still Water Waves 1 Position COG PRNT PRNT 2 Velocity COG PRNT PRNT 3 Acceleration COG PRNT PRNT 4 Position Relative PRNT PRNT 5 Velocity Relative PRNT PRNT 6 Acceleration Relative PRNT PRNT 7 Position Rocker Pin NOPR NOPR 8 Velocity Rocker Pin NOPR NOPR 9 Acceleration Rocker Pin NOPR NOPR 10 Hydrostatic PRNT PRNT 11 Morison Drag PRNT PRNT 12 Slam NOPR NOPR 13 Gyroscopic PRNT PRNT 14 Added Mass Momentum PRNT PRNT 15 L
21. 0 0 00001 00001 000 00001 Gl 000 00001 Ea 2 498E09 6 880E08 9 185 00001 E 000 00001 E 00 E 00 E09 E 00 Figure 11 13 Truncated input in fixed format for positioning analysis SESAM Installjac Program version 8 1 10 June 2010 241 11 2 2 Figure 11 14 Jacket on barge after positioning analysis Comments e The shape of the barge now resembles that of a boat More prismatic elements are used here to model the barge than in example 1 e The units used for acceleration due to gravity and the density of water must be consistent with the units specified on the JOB option The program will issue warning messages if this is not the case Launching During the launching process some flood elements are defined with the CTRL option These elements are defined using nodes already defined in the positioning run and can be coincident with existing tube elements They cannot as of this version 7 1 00 be visualized in Xtract The flooding occurs in the time period 58 to 750 seconds Figure 11 17 shows the jacket at the end of the flooding and in the process of tilting to an upright position The launching analysis input is as follows JOB LAUNCH ENGLISH ECHO TITLE EX2_RESTART DYNAMIC LAUNCHING OF JACKET ON BARGE OPTIONS TRCE PRED PPEL VTFF END RESTART 1 BLTA 5051 5052 BLTB 5053 5054 JLTA 6051 6052 JLTB 6053 6054 RPNA 7 50 40 0 25 0 WNCH 500000 0 5 0 0
22. 0 0 0 FRA Figure3 3 Local System of Axis LSA 3 Rocker Pin Axis System The program uses this axis system to measure the relative motion between the barge s and jacket The origin of the RPA is at the center of the rocker pin on the barge Each structure has an RPA which is created by the program during the Launch Positioning Run XZ Rocker pin axis RPA Xr Zr Rotated Rocker pin axis Figure 3 4 Rocker Pin Axis System RPA Installjac SESAM 20 10 June 2010 Program version 8 1 3 4 Task Outline This outline assumes that you are building your structures from scratch Enter card data that defines basic task parameters structures and global parameters in an input file lt input gt inp This input can also be generated from Preframe files as shown in Figure 3 1 When you execute the program it 1 Calculates the mass center of mass and mass moments of inertia for each structure 2 Creates a local axis system LSA for each structure 3 Prints the Properties of Elements report 4 Creates a RESTART 1 file installjac res The RESTART 1 file contains the structure data that will be read when you run the Launch Positioning task a task which can be also be specified in this input file After this run you will e Check the results using the reports generated by the program 3 5 Entering LAUNCH Data Run Cards The table below lists all of the cards that the program uses during a LAUNCH Data Run The
23. 00 0 0000E 00 ROCKER PIN REACTION RPA 4 9846E 06 Z 6616E 05 1 2462E 08 2 0476E 07 8 4915E 09 1 6791E 07 ERROR PER TIMESTEP 1 1631E 05 2 1515E 06 2 4183E 05 1 3438E 05 3 3834E 05 1 6015E 06 TOTAL FORCE 8 1472E 06 1 7189E 04 1 2702E 06 7 6257E 05 6 1460E 07 1 5064E 06 CLEARANCE FROM SEA BED 116 0025 Figure 5 1 Maximum barge depth at separation 5 6 2 3 Checking the Rocker Pin Reaction You check the rocker pin reaction for two reasons 1 The rocker pin on the barge can handle only so much force 2 The jacket can handle only so much stress The barge owner can tell you how much force the rocker pin can handle You will need to use a structural analysis program to determine what the allowable jacket strength is You should begin checking the rocker pin reaction fields once the rocker pin activates At that point all the force of the jacket on the barge is concentrated on the rocker Installjac SESAM 64 10 June 2010 Program version 8 1 TIME RECORD STRUC POSITION FORCES SECS NUMBER NUMBER AND MOMENTS AT x T z RX RY RZ CENTRE OF GRAVITY SURGE SWAY HEAVE ROLL PITCH YAW 0 50 2 2 POSITION coG 92 5615 0 0034 0 7775 0 0550 2 7464 0 0000 VELOCITY coG 0 0000 0 0000 0 0000 0 0000 0 0000 0 0000 ACCELERATION COG 0 0000 0 0000 0 0000 0 0000 0 0000 0 0000 POSITION ROCKER PIN 0 0000 0 0000 0 1587 0 0550 2 7464 0 0000 VELOCITY ROCKER PIN 0 0000 0 0000 0 0000 0 0000 0 0000 0 0000 ACCELERATION ROCKER PIN 0 0000 0 0000 0 0000 0 0000
24. 0000E 00 0 0000E 00 GYROSCOPIC 0 0000E 00 0 0000EF 00 0 0000E 00 3 3457E 03 4 7928E 03 2 6862E 02 ADDED MASS MOMENTUM 0 0000E 00 o o0008 bo 0 0000E 00 0 0000E 00 0 0000E 00 0 0000E 00 GRAVITY 0 0000E 00 0 0000E 00 1 6622E 08 0 0000E 00 0 0000E 00 0 0000E 00 TRACK WINCH FORCES 0 0000E 00 8 3458E 07 8 2504E 07 0 0000E 00 0 0000E 00 0 0000E 00 ERROR PER TIMESTEP 2 8330E 10 9 9092E 08 6 0717E 10 3 0200E 07 6 7879E 10 6 0Z56E 08 TOTAL FORCE 3 2867E 02 2 6405E 02 4 452ZE 0Z 1 7422E 04 1 5482E 04 6 0591E 03 CLEARANCE FROM SEA BED 112 6740 POSITION NODE 452 24 0367 42 7642 39 7430 VELOCITY NODE 452 0 0001 0 0000 0 0002 ACCELRATION NODE 452 0 0000 0 0000 0 0001 0 00 30 2 POSITION COG 92 4859 0 0102 0 7775 0 0550 2 7464 0 0138 VELOCITY C0G ACCELERATION COC POSITION ROCKER PIN 0 0756 0 0291 0 1588 0 0550 2 7464 0 0138 VELOCITY ROCKER PIN ACCELERATION ROCKER PIN A A r A A A HYDROSTATIC 0 0000EF 00 0 0000E 00 4 5653E 08 1 1370E 07 1 1888E 10 0 0000EF 00 MORISON DRAG 0 0000EF 00 0 0000E 00 0 O0000E 00 0 O0000E 00 0 0000E 00 0 0000EF 00 GYROSCOPIC 0 0000EF 00 0 00000E 00 0 0000E 00 5 5433E 03 1 2825E 02 8 38910E 02 ADDED MASS MOMENTUM 0 OOOO0E 00 0 00000E 00 0 00000E 00 0 00000E 00 0 00000E 00 0 0000EF 00 GRAVITY 0 0000EF 00 0 0000E 00 Z 9038E 08 0 O0000E 00 O 0000E 00 0 0000EF 00 ROCKER PIN REACTION RPA 7 9610E 06 1 5972E4 05 1 6596E 08 1 3668E 07 3 4917E 09 4 0220E 06 ERROR PER TIMESTEP 1 6Z17E 10 5 6724E 0
25. 26 30 Blank 31 35 Initial Increment Number I5 Enter zero 0 to start at the position entered on the POS card Enter a positive or negative number to start at a position other than the starting position For example if you enter one 1 in this field the system will increment the starting position given on the POS card by one then begin the analysis 36 40 Last Increment Number I5 Enter the last increment that you want processed during the analysis For example if the analysis started with increment 0 and this field were 10 the system would analyze the first 11 structure positions This number must be greater than or equal to the initial increment number 41 50 Increment Value F10 0 Enter the amount by which to change the position of the structure for each increment The default is 1 0 degrees 51 60 Release Freedom Flag F10 0 Use this field to equilibrate the out of balance moments in the orthogonal direction to that being rotated The pro gram equilibrates these moments by rotating the struc ture about the orthogonal Y pitch or X roll PSA axis before moving to the next step Enter 0 0 or 1 0 The default is 0 0 i e no freedom release dimensionless SESAM Installjac Program version 8 1 10 June 2010 213 10 70 Structural Tube Element Cards STRE XYZSTRE These cards are required if you are not using a RESTART card Use these cards to describe the TUBE elements for structure 1 Structure 1 is usually the ja
26. 8 1 Apply node names for nodes that are read from the FEM file model when the node name concept is applied A node name is defined by the XYZFEM card and must exist before it is applied If a node name is not found an echo of the name is printed The present card may contain a mix of user defined node numbers and node names of the FEM file model When the card name has the prefix XYZ i e XYZBLTx a message is printed to the Installjac MLG file if the node name is not found node name not defined or user node number applied No message is printed when the word BLTx is applied SESAM Installjac Program version 8 1 10 June 2010 111 10 9 Default Current Direction Card CDRN This card is required 1f the CPRF card is used Use this card to set the default current direction for currents that are specified on the CPRF cards Columns Entry Description and Variable Name Format 7 10 CDRN A4 Enter the word CDRN 11 20 Overall Current Direction from X Axis FRA F10 0 Enter the default current direction with respect to the X axis FRA The program uses this direction for any blank current direction entries on the CPRF cards degrees Installjac 112 10 June 2010 Program version 8 1 10 10 Current Profile Card CPRF SESAM The Current Profile Card CPRF is optional Use this card to define how the current varies with depth It can be changed between restarts If this card is not entered all val ues default to 0 Columns
27. CTRL OPVL CLVL These cards are optional and valid for LAUNCH only If these cards are not entered no valves are opened The open close valve times are new and have the following user input description Valve Opening Closing Times Use these cards to specify the times at which the valves on valve members VMEM are to be opened or closed Note At a time up to and including the valve opening time the percentage flooded and the pressure would be as specified by the initial simulation percentage flooded and pressure on the VTUB card In the case where the opening closing time exceeds the simulation time a single error message for all members stating this would be output and the analysis would continue In the case where the opening closing time is less than the start of the simulation time the valve status will be changed before the simulation begins This may readily occur with a RESTART 1 i e entering a non zero starting time with their associated posi tions and velocities on the TIME POS and VEL cards respectively No message is output All valves are ASSUMED TO BE CLOSED unless specifically opened by these cards Columns Entry Description and Variable Name Format 7 10 12 15 17 19 21 25 CTRL A4 Enter the word CTRL Open or Close Valve A4 Enter OPVL To open the valve CLVL To close the valve Valve Type to be Opened A3 Enter INT For the intake valve valve 1 VNT For the vent valve valve 2
28. Cards DIFF These cards are required 1f you enter DIFM cards These cards are usually associated with the use of ADDM DAMP cards The default is zero 0 0 Use these cards to enter diffraction forces when wave motion dominates the launch analysis Each vector has three freedoms One data card contains numerical values for one vector in respect of the amplitude and phase of each freedom The phase must be consistent with the defini tion on the WDEF card You must enter eight Diffraction Force Vectors DIFF and eight Diffraction Moment Vectors DIFM cards The program reads the vectors in card order The vectors corre spond to the eight wave directions 180 135 90 45 0 45 90 and 135 degrees respectively For example the last direction 135 degrees will have amplitudes of zero if you leave out a card Columns Entry Description and Variable Name Format 7 10 11 15 16 20 21 30 31 40 41 50 51 60 61 70 71 80 DIFF A4 Enter the word DIFF Structure Identifier 15 Enter the number 1 2 or 3 of the structure Blank Surge Force Amplitude F10 0 Enter the amplitude of the surge force The program uses this entry and the next one to calculate the surge force The default is 0 pounds or Newtons Surge Force Phase Angle F10 0 Enter the phase of the surge force The default is 0 degrees Sway Force Amplitude F10 0 Enter the amplitude of the sway force The program uses this entry and the next
29. Description and Variable Name Format 7 10 MRPx A4 Enter the word MRPx x Rocker Pin Identifier below Rocker Pin Identifier For x enter a letter from A to J MRPA MRPB MRPC MRPD MRPE MRPF MRPG MRPH MRPI MRPJ Letters must be entered sequentially don t skip any let ters 11 20 Dynamic Coefficient F10 0 Enter the dynamic friction coefficient This number should be smaller than the static friction coefficient 21 30 Static Coefficient F10 0 Enter the static friction coefficient This number should be larger than the dynamic friction coefficient 31 40 X Coordinate of the Rocker Pin F10 0 Enter the X coordinate of the rocker pin in Fixed Refer ence Axis coordinates 41 45 Y Coordinate of the Rocker Pin F10 0 Enter the Y coordinate of the rocker pin in Fixed Refer ence Axis coordinates 51 60 Z Coordinate of the Rocker Pin F10 0 Enter the z coordinate of the rocker pin in Fixed Refer ence Axis coordinates Installjac SESAM 170 10 June 2010 Program version 8 1 10 47 Maximum Number of Iterations Card MXNI This card is required and used only during a FLOAT run If this card is not entered the program defaults to 100 iterations Use this card to set the maximum number of itera tions to use when the EQON STRX or STRY cards are specified during a FLOAT run Columns Entry Description and Variable Name Format 7 10 MXNI A4 Enter the word MXNI 11 15 Structure Identifier I5 Default is jacket i e number 1
30. E A a e t 223 Node Name Coordinate Cards XYZFEM cccccsscsccccecsesenscececccecsesesssseceeeceeeseenns 226 A A A E E E 229 Example To rooe da od E e a 229 A O DN 230 Laune hin incite eea E a btt did dt 233 Upon dica a sdk echelons ened E Aha EA RAEE TAES 235 Extraction of Member and Point Loads ooooooconnoocccnonccnccnonnnocononnccononncnnnnn no nono ono nono nn ncnnn nn nccnn anno 238 A eas tetesetele E Eea at ae Ltd ead te ame ee dee ent tases dette eee 240 POSIMONIN sete Seen ia 240 O RAN 241 vi SESAM Installjac Program version 8 1 10 June 2010 1 1 1 1 1 2 Introducing Installjac Installjac is part of the SESAM package of Finite Element FE programs It is a simu lation program that performs an evaluation of the installation launch and upending of an offshore steel piled jacket Installjac provides a comprehensive assessment of the hydrostatic and hydrodynamic properties of the jacket during the installation simulations By using a computer model rather than a scale model you save time and get more accurate results because the parameters are easier to change and scaling affects are avoided Installjac therefore incorporates both accuracy and usefulness Where it Fits SESAM programs can be used throughout the entire process of the designing and installation process of offshore steel piled jackets If you model your structure using Preframe or Genie you can feed that data into Installjac to analyze th
31. END This must be the last entry on the last OPTIONS card This is the default The Line Printer Control Options are Note The program will default to COOR ELEM MATE and GEOM if you enter none of these Print Con trol Options COOR Print coordinate data from NODE cards ELEM Print element topology data from STRE NSE HBN and HBW cards MATE Print material properties from MATE cards GEOM Print geometric properties from GEOM cards PPEL Turns on COOR ELEM MATE and GEOM options and prints the detailed properties for each element including the calculated mass value PRED Print expanded data NODL Print only selected expanded data as specified by the COOR ELEM MATE and GEOM options above This option tells the system to generate the least amount of output PRCE Print card echo decks 1 6 Installjac 184 SESAM 10 June 2010 Program version 8 1 NPIT No printing of iterations FLOAT TRC1 Switch on TRACE 1 for all routines PTBF Print ballast forces PTCF Print control member properties TRCE Trace switch for debugging FLOD Output flooding elements in VTF file Launch and FLOAT The following options create output files LDOP Creates a file of FEM nodal loads and ele ments loads with respect to the Fixed Ref erence Axes at the last time increment prescribed with the TIME card LAUNCH only see example case in Sec 11 1 4 NOGL Do not print structure Global Summary Reports e Mass and Displaced Volume where
32. Entry Description and Variable Name 7 10 CPRF Enter the word CPRF 11 20 Depth below Sea Level ve Enter the depth at which the current velocity or direction changes The default is 0 0 feet or meters See the JOB card 21 30 Current Velocity Enter the new current velocity at that depth The default is 0 0 feet second or meters second See the JOB card 31 40 Current Direction from X Axis FRA Enter the direction of the current with respect to the X axis FRA The default current direction is specified on the CDRN card or is zero if the CDRN card is not used feet second or meters second See the JOB card Format A4 F10 0 F10 0 F10 0 SESAM Installjac Program version 8 1 10 June 2010 113 10 11 Control Flooded Tube Cards CTRL TUBE XYZCTRL TUBE These cards are optional and can be used to specify elements that you can control the flooding of The program calculates the internal volume of the tube and applies the per centage ballast to this value During the analysis the program iterates to find the static equilibrium position of the free surface ballast The members do not need to be the same as the structural members defined in STRE and NSE cards There is no default The twelve types of Control Flooded Member cards are described below TUBE LAUNCH amp FLOAT ETUB FLOAT only OPEN LAUNCH amp FLOAT CLOS LAUNCH amp FLOAT FINI FLOAT only OPND LAUNCH amp FLOAT CLND
33. Flooded Member cards are new and have the following user input description Valve Flooded Tube Card Use these cards to specify elements that you can control the flooding of by valve inlets outlets The program will calculate the amount of ballast in the member by the amount of water entering the flood valve together with the amount of air that exits through the vent valve Either or both valves may be omitted although if both are omitted it is usu ally easier to use a control flooded tube During the analysis the program solves the differential equations governing the rate at which water air flows through the valves to give the percentage of volume flooded Note Either the intake or vent valve may be omitted If both are omitted the member becomes a control flooded tube with constant volume as specified by the initial vol ume In practice both valves will be able to act as vent or intake valves This will depend only on the internal fluid free surface the position of the pipe end and the pressure dif ference across the valve The user has the responsibility of deciding whether the water below the intake valve wall position or an air pocket above the vent valve wall position exists at the start of the simulation The program will issue messages where appropriate for any non physical values e g 110 flooded The time history of each individual flooded member would be optionally available for output on the line printer graphics
34. Freedom Report to determine valid starting positions PRP is used primarily during a launch run or when analyzing the behavior of structures during LAUNCH Columns Entry Description and Variable Name Format 7 10 PRPx A4 11 20 21 30 31 40 41 50 51 60 61 70 Enter the word PRP x Structure Identifier below Structure Identifier Enter the number 1 2 or 3 for x PRP1 PRP2 or PRP3 to identify the structure that you want A 3 defines the starting position of the hinge between trailing and leading barges in an articulate barge launch X Coordinate F10 0 Enter the X coordinate for the center of gravity of the structure using the RPA axis This field is ignored when positioning structure 3 Y Coordinate RPA F10 0 Use this field to define the Y coordinate for the center of gravity of the structure using the RPA axis This field is ignored when positioning structure 3 Z Coordinate RPA F10 0 Use this field to define the Z coordinate for the center of gravity of the structure using the RPA axis This field is ignored when positioning structure 3 X Rotation F10 0 Use this field to define the X rotation angle of the struc ture This field is ignored when positioning structure 3 degrees Y Rotation F10 0 Use this field to define the Y rotation angle of the struc ture using the RPA axis degrees Z Rotation F10 0 Use this field to define the Z rotation angle of the struc ture using the R
35. Fully Submerged e Global Parameters e Properties of Structure n e Position Velocity and Acceleration e Time Integration Parameters e Parameters Directly Related to Launching e Parameters Affecting Hydrodynamic Static Element Forces e Crane Hook or Cable Loads The last five elements are also controlled by the PRCD option FORM Write formatted SESAM load file L1 fem with LDOP card and plot file vtf with VTFF card Absence of this option gives an unformatted files VTFF Write the Viewer Transformation File VTF that is used for animations in Xtract If used with FORM a separate vtf file for visualizing timeseries of vari ous variables is outputted Without FORM a binary file containing both model and timeseries data results PBIS Print results from both iteration LAUNCH only SESAM Program version 8 1 10 June 2010 10 54 Installjac 185 Trajectory Starting Conditions Cards PCGx These cards are optional POS PRP and PCG cards are mutually exclusive Use PCG cards to define the starting position of the structures after separation Use the Degree of Freedom Report to determine valid starting positions PCG is used primarily during a launch run or when analyzing the behavior of structures during LAUNCH Columns 7 10 11 20 21 30 31 40 41 50 51 60 61 70 Entry Description and Variable Name PCGx Enter the word PCGx x Structure Identifier below Structure Identifier Enter t
36. Hook Loads Current Parameters Wave Parameters Here is an example of what the cards for this task would look like together JOB LAUNCH TITLE EXAMPLE LAUNCH RUN OPTIONS PRFO END RESTART 2 TIME 30 1 0 0 0 NOD1 1 2 NOD2 21 22 Running the Program Type in the following on the command line or run through SESAM Manager as in Fig ure 3 14 installjac exe input lt inputfile gt inp During the processing the program reads the structure block data from the RESTART Installjac SESAM 62 S 6 5 6 1 5 6 2 5 6 2 1 10 June 2010 Program version 8 1 2 file installjac res It then begins the launch repeating the structure positioning and force calculations until all the time steps have completed Finally it generates the reports and updates the RESTART file installjac res which contains the structure and position data Checking the Reports Running LAUNCH produces the same reports as the Positioning Run The following are generated and written to the text output file e Input Echo Report e Properties of Structure 1 Report e Properties of Structure 2 Report e Linear Wave Parameters for Structure 1 Report The Time History Report e Time History of Specified Nodes You can ignore the first four and concentrate on the Time History report Things to Check Here are a few things you should check during a launch e The trim of the barge e The depth of submergence of the barge stern
37. Identifier below Structure Identifier Enter the number 1 2 or 3 for x AMS1 AMS2 or AMS3 to identify the structure that you want to set the starting positions for 11 20 Added Mass Modification Factor F10 0 The added mass of the structure will be multiplied by the number you enter here Installjac SESAM 108 10 7 10 June 2010 Program version 8 1 Hinge Axis Card AXIS XYZAXIS This card is required for articulated barges Use it to define the hinge axis for an articu lated barge Columns Entry Description and Variable Name Format 7 10 4 10 AXIS or XYZAXIS A4 A7 11 20 21 25 26 30 31 35 36 40 Enter the word AXIS XYZAXIZS Maximum Hinge Excursion Angle F10 0 Enter the maximum angle that the hinge can rotate about its axis The hinge axis is parallel to the plane of the tracks and at right angles to the tracks degrees 1st Hinge Node on Trailing Barge 15 A16 Enter the node number node name that corresponds to the connection on the trailing barge This will connect with the Ist hinge node on the leading barge columns 31 35 2nd Hinge Node on Trailing Barge 15 A16 Enter the node number node name that corresponds to the connection on the trailing barge This will connect with the 2nd hinge node on the leading barge columns 36 40 1st Hinge Node on Leading Barge 15 A16 Enter the node number node name that corresponds to the connection on the leading barge This will connect
38. Joint_444 14 75 33 11409 96 9867 ID XYZFEM cards given in Installjac input files The XYZFEM cards may be given in the Installjac input file for the positioning run as well as for restart runs a Positioning run In the positioning run the XYZFEM cards must be included in the input file for other data not generated from FEM files specified with the OINP option on the FEM file conversion card When reading the input file node names and coordinates values are stored and the XYZFEM cards are written as comment cards to the final input file AINP option which is used in the further execution of Installjac Example X YZFEM cards included in input file Installjac_ Command inp XYZFEM Joint_77 3 0 17 0 18 0256 XYZFEM Joint_38 39 0 0 16 5 5 XYZFEM Joint_321 27 395 15 863 10 0 Installjac SESAM 228 10 June 2010 Program version 8 1 XYZFEM Joint_77 ESO 17 0 18 0256 XYZFEM Joint_38 39 0 TO 16 5 XYZFEM Joint_321 27 395 15 865 10 0 b Restart runs When reading the restart input file node names and coordinates values are stored and the XYZFEM cards are written as comment cards to a new file with the name restartl inp or restart2 inp for restart 1 or restart 2 run respectively The new file con tains translations of element and node names and is used further in the execution when Installjac reads input information Example Restart input file containing
39. June 2010 Program version 8 1 7 5 2 2 Element Types FLOAT recognizes four types of elements Tubes TUBE Tubes are the main elements used to describe a jacket Spheres SPHE 7 5 3 7 5 4 Spheres are usually used to model buoyancy tanks on jackets Point Masses PMAS Any part of a structure where the mass needs to be modeled can be entered as a point mass Point Buoyancies PBOY Use these when other elements cannot model the hydrostatic displacement properties Entering Jacket Elements You enter jacket elements on two types of cards Structural Element STRE cards let you enter load bearing elements The Non structural Element NSE cards lets you enter data for things like boat landings and external ballast tanks Structural Element cards define TUBE elements For each load bearing tube enter ele ment node material and geometry numbers The nodes that you enter must refer to node numbers that you entered on NODE cards The material numbers refer to MATE cards and the geometry numbers refer to GEOM cards 2STRE TUBE 281 282 1 433 The card above would generate a load bearing tube between nodes 1 and 2 It would have the material properties as defined on the MATE card for material group 1 and the geometric properties as defined on the GEOM card for geometry group 1 Enter non structural elements for the jacket on NSE cards NSE cards can generate other elements besides tubes For example you might use it to p
40. Run this task after verifying that the structure has reached an equilibrium position The input for this task can be combined in the same file Getting Ready One thing that you can do to help with this task is generate a list of all the node num bers for the jacket You can use this to quickly identify the members that you want to flood This will only be necessary if you used an NODL Option for the data run Also make sure that the structure the nodes where you want to put crane hooks You will need to redo the Data Run if the crane hook nodes are not defined Make sure that your Data Run includes a MATE card for the density of sea water Use 1025 kilograms per cubic meter if you are using metric units or 1 9876 pounds per cubic foot for English units Task Outline The typical way to upend a jacket is to attach a crane to the top of structure as it floats in its equilibrium position on the surface of the water Once the crane is attached you pick up the jacket as high as the crane will allow The jacket will then be hanging from the crane with its base submerged At this point you begin flooding the deepest mem bers The jacket will rotate about the crane hook trying to right itself The trick 1s to flood members in such a way that the jacket can e Maintain equilibrium e Right itself e Keep from striking the sea bed The jacket is then lowered into position when it is floating upright This outline assumes that you are using structu
41. X axis of the jacket passes through the hook position You can predict what the angle of the jacket will be when all four lines are taunt by sub tracting half the angle between the cables when the jacket is upright from the Y rotation angle of the jacket when it is upright For example if the Y rotation angle of the jacket when it is upright is zero 0 degrees and the angle between the cables in that position is thirty 30 degrees all four cables would become taunt when the Y rotation angle was fifteen 15 degrees See figure reference You can define up to 100 different LINE cards if there are no other cable types TINA 1p Sc a le Og LOO Defining the Flooding Steps Often you begin flooding after raising the jacket to its maximum crane hook height You can however begin flooding at any point in the sequence Currently the program has three ways to control flooding e Percent flooded TUBE cards e Entrapped air ETUB cards e Free Flooding OPEN CLOS cards SESAM Installjac Program version 8 1 10 June 2010 93 9 5 4 1 9 5 4 2 9 5 4 3 Using TUBE Cards TUBE cards let you create members between any two nodes on the structure and flood a percentage of the member with some substance It defines the member using a GEOM card definition for a tube What it actually does is uses the GEOM card to get the outside diameter OD and wall thickness of the member It then calculates the inside diameter and determines the v
42. X Y Z RX RY RZ lt NOD gt U Nodal displacements X Y Z lt NOD gt V Nodal velocities X Y Z lt NOD gt A Nodal accelerations X Y Z 5 8 Table 5 2 Time series component results A J or a B for Barge and Jacket respectively as prefix and a DOF X Y as suf fix forms the complete name of the timeseries in Table 5 2 for example BPOSCGRX Load Calculation Installjac can calculate the loads on the jacket for a given time step and transfer these to a Sesam structral analysis model This means that you have to do a number of load cal culation runs in Installjac The load calculations are typically performed when each of the horizontal frames of the jacket passes over the rocker pin Load calculation is initi ated by the option LDOP on the OPTIONS card Each load calculation will update the jacket model file T FEM with all loads from e Gravity forces e Acceleration forces e Drag forces e Buoyancy forces Making the structural strenght analysis model The T FEM file may then be used for a structural analysis in Sestra Reaction forces from rocker pin and skid beams are not included on the load file and must be applied as supports on the jacket This may be done by modelling the barge and the rocker arm as Sesam super elements Installjac SESAM 68 10 June 2010 Program version 8 1 with appropriate supports and connect them to the jacket in Presel The barge can be represented as a full shell barg
43. aean Desas 44 Defining Rocker Arm Properties oooooncccnonnnonconoconannnnnoncnancnononnnonnann ara Eaa aeaea EEE ate 44 Rocker Arm Description RPNx Cards ssseeessesssesessssssessressesssesstesstessssseesssesssesssesstestessressessess 45 Mass and Cross Section properties of the rocker alM ooooonnccnncnnocanocononcnononononaconncnononnncnnncnncconccns 48 PatinchsRestraints Avieicesiczestefascestesac vezsdoeybivecus tateceatht ctechs hasthftssarsbue Cocphdee elena 51 Setting Time Integration Parameters 0 0 cee ee essecsseesecesecescenseceseceeeeeaeeeaecaecsaeeseesseeeaaecaeenseeeaes 51 Running the Prostate de A deere Na E das 52 Checking the Reports leticia 53 Time History Report iii ia 53 R l sof Thumbi ona ae eee ea apea e Sots artestes a a e Eta e Tarea EN Rre 53 Checking for Equilibrium iesirea iee a E ek RA p ida 54 Checking the Tin of the Barg Ecevit nie fe Sa es ie asad den e a ts 55 Plotting the Equilibrium Position eseseeeseeeeeesesresseeresressesrsstesrertssresrsrtsstesestrstessesrisresresreseeeene 56 EA AA si oaas scaena oaro s sadcades siedo oE idoroko iisto series 57 AA A E E ER E A T 57 WIRED EEE A E TAA stdcextecaabeud 57 Task QUIE iia ca ii td iodo Siva eaa 57 Entering Launch Rum Cad dad te 58 Setting JOD OPIO ii AA a e East 60 Coding the RESTART Cardio ad ii 60 Entering Time Integration Parameters ooococcnnocnnncconcnnnnnoncnonononannnnonn con n cnn ncnnnannn ran nr nano nccnnnana conan 60 Controllin
44. and Metarboara are concentrated masses acting at the centre of gravity of port and starboard side of the rocker arm The centre of gravity is calculated on basis of section geometries entered by the RAXS cards following each of the RAMS cards The RAXS cards can not be entered without a previous RAMS card RAXS cards fol lowing the first RAMS card specify section geometries of the port side rocker arm and RAXS cards following the second RAMS card specify section geometries of the star board side rocker arm Equal groups of RAMS and RAXS cards give symmetric prop erties of the rocker arm and equal loadings inertia drag and hydrostatic pressure loading to both sides In solution of the equation system the port and starboard sides are treated as one rigid body A RAXS card contains the following cross section data RAXS Rust Am Apa H W Ca C where X is the distance from main rocker pin to the cross section where the remaining parameters apply A Ang are the mass and hydrostatic displacement areas H is the height W is the width Cg Cm are the drag and added mass coefficients 2 to 10 RAXS cards may follow each RAMS card Rocker arm cross sections are illustrated in Fig 4 7 SESAM Installjac Program version 8 1 10 June 2010 49 Rocker arm 2 Rocker arm 3 B Rocker arm 1 Active rocker arm Rocker arm 2 Rocker arm 3 Rocker pin 2 X5 C Rocker arm 1 Rocker arm 2 Active rocker arm
45. barge barge jacket combination The added mass and damping are values about centre of gravity of the structure Units must be consistent with units applied in the analysis Columns Entry Description and Variable Name Format 7 10 ADDM A4 Enter the word ADDM 11 20 BLANK 21 30 X Translational Coupling F10 0 31 40 41 50 51 60 61 70 Enter the added mass value for the X translational degree of freedom Y Translational Coupling F10 0 Enter the added mass value for the Y translational degree of freedom Z Translational Coupling F10 0 Enter the added mass value for the Z translational degree of freedom X Rotational Coupling F10 0 Enter the added mass value for the X rotational degree of freedom Y Rotational Coupling F10 0 Enter the added mass value for the Y rotational degree of Installjac SESAM 106 10 June 2010 Program version 8 1 freedom 71 80 Z Rotational Coupling F10 0 Enter the added mass value for the Z rotational degree of freedom SESAM Installjac Program version 8 1 10 June 2010 107 10 6 Added Mass Multiplication Factor Cards AMSx These cards are required Use them to modify the added mass of a structure If these cards are not entered the Added Mass Multiplication Factor will default to 1 0 Note The program applies added mass to each hydrodynamic component of the struc ture Columns Entry Description and Variable Name Format 7 10 AMSx A4 Enter the word AMSx x Structure
46. blocks This allows the possibility of arranging the data in any order that makes sense and eases text input For example the barge description data nodes elements materials etc can all be placed in a group in a block for easy reference The following table highlights these changes 1t shows the old deck number and header the deck title the old card names the new abbreviation for the cards in that deck and which modules of Installjac that use the cards Old Deck Num Title Old Card New Card Module in ber and Header Name Keyword LAUNCH 1 COOR Node Coordinates CART NODE L F 2 ELEM Structural Elements TUBE STRE L F TUBE 3 MATE Material Properties nnnn MATE L F 4 GEOM Geometric Properties nnnn GEOM LB TUBE TUBE PMAS PMAS PRIS PRIS SPHE SPHE DISC DISC TRIA TRIA PBOY TRAP TPPL SYMX SYMY Installjac SESAM 6 10 June 2010 Program version 8 1 5 1 ADEL Additional Jacket Elements nnnn NSE1 L F C Non structural TUBE TUBE SPHE SPHE PBOY PBOY PMAS PMAS PRIS PRIS DISC DISC TRIA TRIA TPPL QPPL TRAP HBW1 HBN1 5 2 ABEL Hydrostatic Barge Elements nnnn NSE2 L F C PMAS PMAS PRIS PRIS TPPL QPPL HBW2 HBN2 5 3 HYBE Hydrodynamic Barge Ele WIDT NSE3 L ments nnnn PMAS PRIS NODE HBW3 HBN3 6 GLOB Global Parameters FLPR FLPR L F ACCG ACCG CPRF CDRN 7 1 TRAC Track Positions BLT1 BLTA L F BLT2 BLTB JLT1 JLTA JLT2 JLTB SESAM Instal
47. card tells the program which RESTART file to use A positioning run uses RESTART 1 and creates RESTART 2 The RESTART file is created by the DATA option of the LAUNCH or FLOAT It contains the information about the structures and the global parameters Defining the Track Positions Installjac has two Track Position cards barge BLT and jacket JLT Each structure has two tracks so you will code two BLT and two JLT cards The track cards all use the same format Each contains e The name of the structure BLT or JLT e The letter of the track A or B The number of the node at the top of the track e The number of the node at the bottom of the track BLTA 2111 2112 BLTB 2121 2122 JLTA 1111 1112 JLTB 1121 1122 1 The four track nodes for a structure must lie in the same plane 2 The two tracks on a structure must be parallel 3 The two tracks on a structure must be the same length The lengths of tracks on different structures however do not have to be the same For example the tracks on the jacket could be 400 long while those on the barge might be only 300 4 The first nodes on each of the barge tracks must be positioned vertically above and parallel to the main rocker pin This usually coincides with the stern of the barge 5 The distance between the tracks on the jacket must match the distance between the tracks on the barge 6 The barge tracks should be parallel to the barge deck Installjac S
48. card works in conjunction with the Friction and Restraint cards The FRIC card determines the amount of friction that the winch force must overcome before the jacket can begin moving The RELF card controls some special values that you can use for sensitive launch problems Defining Friction Data The FRIC card determines the amount of friction between the jacket and barge tracks The program uses two friction coefficients static and dynamic The program opposes the maximum winch force by applying the static friction coefficient when the relative motion along the tracks is zero Once the jacket begins to move the program reduces the friction force to the dynamic coefficient At EPR we typically use 0 05 and 0 04 for the static and dynamic coefficients respectively FRIC 0 04 0 05 Defining Rocker Arm Properties Three groups of input data relate to the definition of the rocker arm properties e Rocker arm description RPNx cards SESAM Installjac Program version 8 1 10 June 2010 45 e Mass and Cross Section properties RAMS and RAXS cards e Restraint force and moment to the opening of the main rocker arm RELF card Card Description Status RPNx Rocker Arm Description Cards Required RAMS Rocker Arm Mass Cards Optional RAXS Rocker Arm Cross Section Cards Optional RELF Restraint Card Required 4 5 5 1 Rocker Arm Description RPNx cards Rocker arms at the stern of the barge are described by the RPNx car
49. cubic meter in still water FLPR 25 0 1000 0 3 5 7 2 Gravity Card The ACCG card sets the acceleration of gravity It defaults to the appropriate value for the units set on the JOB card ACCG 9 81 All of the cards together might look like this for a LAUNCH analysis JOB LAUNCH OPTIONS DATA NODL END TITLE EXAMPLE STRUCTURES JACKET DESCRIPTION NODE 1 19484 9873 53467 NODE 2 19484 9873 53467 NODE 3 19484 9873 53467 NODE 4 19484 9873 53467 JACKET LAUNCH TRACK NODES NODE 401 19484 9873 53467 NODE 402 19484 9873 53467 NODE 403 19484 9873 53467 NODE 404 19484 9873 53467 STREN Ly Hye da Se STRES Deo ody LP STRE 1S chy Dee IA STRE Min Tg eS iD ATE 1 7 850E 3 ATE 2 9 250E 3 ATE 3 2 184E 6 GEOM TUBE 1 10 0 0 1073 0 0 BARGE DESCRIPTION NODE 201 19484 9873 53467 NODE 202 19484 9873 53467 NODE 203 19484 9873 53467 NODE 204 19484 9873 53467 BARGE LAUNCH TRACK NODES NODE 501 19484 9873 53467 NODE 502 19484 9873 53467 NODE 503 19484 9873 53467 Installjac SESAM 32 3 6 3 6 1 3 6 2 10 June 2010 Program version 8 1 NODE 504 19484 9873 53467 HBW2 100 0 HBN2 201 202 203 204 205 MATE 4 7 850E 3 MATE 5 9 250E 3 MATE 6 2 184E 6 GEOM DISC 2
50. e g percent flooded mass flooded distance of member free surface from the MSWL pressure etc More details may be found on the PRN NOP card parameter 36 A maximum of 100 VTUB valve flooded members may be input Columns Entry Description and Variable Name Format 7 10 4 10 CTRL XYZCTRL A4 A7 Enter the word CTRL or XYZCTRL 12 15 VTUB A4 Enter the word VTUB 16 20 Structure Identifier 15 default is Jacket i e 1 21 25 1st Node 15 A16 Enter the first node number node name of the element SESAM Program version 8 1 10 June 2010 26 30 36 40 41 45 46 50 51 55 56 60 2nd Node Enter the second node number node name of the ele ment Material Group Enter the material group number of the element Material groups are specified on MATE cards Note If the material group number is omitted by the user a material the density of seawater will be used by default The density on the MATE cards should be approximately that of seawater If it is greater than 10 of the density of seawater a warning will be issued Geometric Group Enter the geometry number for this element Geometric group numbers are defined on GEOM cards Percentage of Volume Flooded Enter the percentage of the element that is flooded at the start of the simulation Note On a RESTART 2 analysis this value will change At a time up to and including the opening time for either valve specified on the OPVL and CLVL cards
51. is applied If a node name is not found an echo of the name is printed The present card may contain a mix of user defined node numbers and node names of the FEM file model When the card name has the prefix XYZ i e XYZCTRL a message is printed to the Installjac MLG file if the node name is not found node name not defined or user node number applied No message is printed when the word CTRL is applied Installjac SESAM 126 10 June 2010 Program version 8 1 10 17 Free Flooding Card CTRL XYZCTRL This card is optional Use it to override the ballast valve setting for any step Columns Entry Description and Variable Name Format 7 10 4 10 CTRL XYZCTRL A4 A7 Enter the word CTRL or XYZCTRL 12 15 Ballast Valve Setting A4 Enter OPEN To open the ballast valve CLOS To close the ballast valve 16 20 Structure Identifier IS default is Jacket 1 e 1 21 50 Element Numbers element names I5 Enter the numbers names of the elements that you are opening or closing The element numbers are automati cally listed unless you use the NODL No Data List option in which case you can list element numbers using the ELEM option on the OPTIONS card Apply element names for elements that are read from the FEM file model when the ele ment name concept is applied An element name is defined by the XYZELE card and must exist before it is applied If an element name is not found an echo of the name is printed The present card may contain a m
52. is specified using data from the output generated during the positioning run The data of interest here are the positions of the barge and jacket when velocities and accelerations are zero i e when an equilibrium position is attained The x coordinate of the COG of the barge is 25 44 in the FRA axis whilst the barge coordi nate components of interest are the heave and pitch as shown in Fig ure 11 4 above e The analysis duration is 250secs 500 increments of 0 5secs SESAM Installjac Program version 8 1 10 June 2010 235 Figure 11 6 Jacket separation from barge during launching Job name ex1_launch inp 20 O A Figure 11 7 Barge and jacket C O G clearances from seabed during launching Figure 11 7 is a timeseries plot showing the variables JSBCLRZ and BSBCLRZ i e the jacket and barge clearances respectively Table 5 2 lists all the variables that can be plot ted in Xtract through the menu Graph VTF Plot The timeseries data are store in the file lt name gt _pl vtf for ascii vtf output and in the same file as other analysis data lt name gt vtf for binary output 11 1 3 Upending The input file for the upending analysis is shown below Installjac SESAM 236 10 June 2010 Program version 8 1 JOB FLOAT TITLE A5 BARGE JACKET EQON STRX OBTZ OPTIONS PPEL PBIS STR 1 VTFE END RESTART 1 ES 1t GLOB KKK K FLPR 114 0 1025 0 ACCG9 81 ES st TTLM ES MMVE 1 1 00 1 00 1 00 MERR 1 0 02 0 02
53. lines EQON STRX STRY and OBTZ respectively the first involves the actual flood ing and hook loading analysis the other three are stability analyses e The steps increments shown in the VTF file for the upending analy sis represent numerical iterations that have no relation to the actual movement of the jacket to its final position Figure 11 9 The jacket at the end of the flooding and hook loading analysis NB An upending analysis alters the restart file installjac res which then cannot be used for launching or load extraction analyses Installjac SESAM 238 10 June 2010 Program version 8 1 11 1 4 Extraction of Member and Point Loads Member and point loads are extracted before or just at the time the jacket separates from the barge using LDOP with the OPTIONS option i e at times less than about 30 seconds Transverse element loads caused by weight and inertia and hydrodynamic axial loads caused by drag and tube end elevation differences are outputted The input file used is shown below for time equal to 30 seconds in the launching process JOB LAUNCH TITLE JACKET LOADING AT 0 25 AND 30 Seconds RUN THIS ANALYSIS AFTER EX1_LNCH INP OPTIONS TRCE PRED PPEL LDOP FORM END RESTART B ARGE AND JACKET AS IN Figure 11 5 ROCKER ARM 2 IN NUMBER COORDINATES AND PROPERTIES AS IN Figure 11 5 LOAD CASE 1 STATIONARY JACKET AND BARGE ok ok ok ok STARTING POSITIONS OF BARGE AND JACK
54. load FEM files can also be gener ated FLOAT produces RESTART files and printed reports that describe several properties of the jacket VTF files can also be generated but these only show the jacket during iteration stages and are not positions in the time domain The VTF files are used by Xtract for animation and X Y time series plots whilst FEM files are used by SESTRA for stress analysis System Requirements Installjac version 7 1 02 and later and Xtract version 1 6 00 and later are only avail able on Windows operating system i e NT and XP An Overview of Jacket Launching Using Installjac A typical steel piled offshore structure is a lattice spaceframe structure which supports the deck and superstructure of a platform and is anchored to the seabed by piles After a jacket has been fabricated it is transported to the launch installation site on a launch barge The typical launch barge is a wide flat decked vessel it has a rocker arm at the stern of the vessel Winches pull the jacket towards the stern until weight of the structure acti vates the rocker arm At that point the jacket slides under its own weight into the water Installjac SESAM 4 1 7 1 1 7 2 1 8 10 June 2010 Program version 8 1 Using LAUNCH The jacket and the barge both have launch tracks that enable the jacket to slide along the barge toward the rocker arm Once the barge and jacket are at the launch site the jacket is launched off the
55. name is printed The present card may contain a mix of user defined node numbers and node names of the FEM file model When the card name has the prefix XYZ i e XYZNODx a message is printed to the Installjac MLG file if the node name is not found node name not defined or user node number applied No message is printed when the word NODx is applied Installjac SESAM 174 10 June 2010 Program version 8 1 10 50 Coordinate Cards NODE These cards are required if you are not using a RESTART card Use NODE cards to enter the coordinates of each joint in all three structures All coordinates are in a Carte sian coordinate system of your choosing Columns Entry Description and Variable Name Format 7 10 NODE A4 Enter the word NODE 16 20 Node Number I5 Enter the node joint number for the coordinates on this card 21 30 X Coordinate of the Node F10 0 Enter the X coordinate of the node 31 40 Y Coordinate of the Node F10 0 Enter the Y coordinate of the node 41 50 Z Coordinate of the Node F10 0 Enter the Z coordinate of the node SESAM Installjac Program version 8 1 10 June 2010 175 10 51 Non Structural Element Cards NSEx XYZNSEx These cards are optional for jackets and required for barges Use this card to specify the node connections material group numbers and geometry group numbers for non structural elements Non structural elements are ones for which the program will not generate element loads They can repr
56. of Installjac or and specified in a separate file that is read during the positioning run D XYZFEM cards given in a separate file To read the input file containing the XYZFEM cards the file name must be entered with the NINP option on the FEM file conversion card see example below To read the conversion cards the option CONVERT must be included on the JOB card On basis of coordinate values the node names are translated to node numbers and used further in the run execution of Installjac The node name number relation is saved on file lookup res to be applied in restart executions when required Example FEM file conversion cards JOB LAUNCH CONVERT TITLE JACKET LAUNCH INPUT Final input file SESAM Installjac Program version 8 1 10 June 2010 227 AINP all inp Jacket FEM file JINP T11 FE Barge FEM file a dummy file for now BINP T100 FE Endcut file EINP endcut inp Node name file of FEM file nodes NINP xyzfem inp File with other options not generated from FEM file OINP Installjac_Command inp Node name file with XYZFEM cards xyzfem inp KKK ERER Node names to be translated to node numbers KKKK AREA Node name x coord y coord z coord KKK XYZFEM Joint_692 14 187 733 1149 96 9867 XYZFEM Joint_675 14 797 439 0229 110 803 XYZFEM Joint_427 14 75 35 0229 110 803 XYZFEM
57. one to calculate the sway force The default is 0 pounds English or Newtons Metric Sway Force Phase Angle F10 0 Enter the phase of the sway force The default is 0 degrees Heave Force Amplitude F10 0 Enter the amplitude of the heave force The program uses this entry and the next one to calculate the heave force The default is 0 pounds English or Newtons Metric Heave Force Phase Angle F10 0 SESAM Installjac Program version 8 1 10 June 2010 133 Enter the phase of the heave force The default is 0 degrees Installjac 134 10 24 10 June 2010 Program version 8 1 Diffraction Moment Vector Cards DIFM SESAM These cards are required if you enter DIFF cards These cards are usually associated with ADDM DAMP cards Use these cards to enter diffraction moment vectors when wave motion dominates the launch analysis Each vector has three freedoms One data card contains numerical values for one vector in respect of the amplitude and phase of each freedom The phase must be consistent with the definition on the WDEF card You must enter eight Diffraction Force Vectors DIFF and eight Diffraction Moment Vectors DIFM cards The program reads the vectors in card order The vectors corre spond to the eight wave directions 180 135 90 45 0 45 90 and 135 degrees respectively For example the last direction 135 degrees will have amplitudes of zero if you leave out a card Columns 7 1
58. tell the program not to output the selected parameters Selected items are printed by default NOP turns them off x Structure Identifier below Structure Identifier n Enter the number 1 2 or 3 for x PRN1 PRN2 or PRN3 and NOP1 NOP2 or NOP3 to identify the structure that you want Note You must enter cards for each structure that you have defined 11 80 Parameter Reference Numbers 1415 Enter up to 14 parameter reference numbers per card The reference numbers must be right justified inside their individual fields The following table lists the parameters and their reference numbers Installjac SESAM 192 10 June 2010 Program version 8 1 Printing Parameter Numbers Launch Float NOP NOP l 6 Position COG 1 3 Position of the COG Ze 6 Velocity COG 2 3 Hydrostatic Force 3 6 Acceleration COG 3 3 Total Crane Hook Force 4 6 Position Relative 4 3 Total Ballast Force 5 6 Velocity Relative 5 N U 6 6 Acceleration Relative 6 N U ds 6 Position Rocker Pin 7A N U 8 6 Velocity Rocker Pin 8 N U 9 6 Acceleration Rocker Pin 9 N U 10 6 Hydrostatic 0 3 Total Force 11 6 Morison Drag 12 6 Slam 1 1 Unflooded Member Buoyancy 13 6 Gyroscopic 2 1 Jacket Restraint Moment 14 6 Added Mass Momentum 3 1 Clearance From Sea Bed 15 6 Linear Damping 4 6 Cut Water Place Area 16 6 Diffraction 5 N U 17 6 Froude Krylov 6
59. tem to be considered in equilibrium feet or meters Maximum Residual Error for Y Movement F10 0 Enter the maximum residual error for a movement in the Y direction on the last iteration The residual from the drag calculations must fall below this value for the sys tem to be considered in equilibrium feet or meters Maximum Residual Error for Z Movement F10 0 Enter the maximum residual error for a movement in the Z direction on the last iteration The residual from the drag calculations must fall below this value for the sys tem to be considered in equilibrium feet or meters Note R Acceleration of gravity 9 81 32 18 for English units The acceleration of gravity is set on the ACCG card Maximum Residual Error for Oy F10 0 Enter the maximum residual error for a movement in the X degree of freedom on the last iteration The residual from the drag calculations must fall below this value for the system to be considered in equilibrium degrees Maximum Residual Error for Oy F10 0 Enter the maximum residual error for a movement in the Y degree of freedom on the last iteration The residual from the drag calculations must fall below this value for Installjac SESAM 166 10 June 2010 Program version 8 1 the system to be considered in equilibrium degrees 61 70 Maximum Residual Error for 0 F10 0 Enter the maximum residual error for a movement in the Z degree of freedom on the last iteration The residual from the dr
60. the body clearances and velocities of the structures using the program generated reports 5 4 Entering Launch Run Cards Table 5 1 lists all of the cards that Installjac can use during a LAUNCH Run The table is followed by instructions for completing the cards that you would usually use at this point in an analysis Card Description Status JOB Job Card Required TITLE Title Cards Optional ene Comment Cards Optional OPTIONS Options Cards Required RESTART Restart Card Conditional TIME Time Parameters Card Required Note The following cards can be used to restart a launch from a particular position POS Position Cards Conditional VEL Velocity Cards Conditional ACC Acceleration Cards Conditional Note When restarting and the jacket is still on the barge you must include these cards as well RPN Rocker Pin Cards Conditional WNCH Winch Card Required FRIC Friction Force Card Required RELF Restraint Cards Required MRP Multiple Rocker Arm Property Cards Conditional RD Rocker Dimension Cards Conditional SESAM Program version 8 1 10 June 2010 Installjac 59 Note You can also include additional cards to perform special functions Note Use these to control parameter sensitivity HYD Buoyancy Multiplication Factor Cards Conditional DRG Viscous Drag Multiplicat
61. the displaced fluid for PBOY elements The units vary based on the units of measure setting on the JOB card slugs Ib sec ft or kilograms kg sec m Note that the mass density is weight density g For exam ple the mass density of steel in English units is 490 lbs 1 32 2ft sec 15 217 slugs Ib sec ft ft 31 40 Density 15 Enter the gas density at atmospheric pressure at 60 degrees Fahrenheit This entry is required if the vent valve gas pressure or flow rate is specified on the geome try continuation card The default is 1 24 kilograms m Air slugs ft English or kilograms m Metric SESAM Installjac Program version 8 1 10 June 2010 165 10 44 Maximum Residual Error Card MERR This card is optional and can be used only with EQON STRX or STRY cards during a FLOAT run The defaults for this card are used only if the card is not entered Use this card to limit the maximum residual error for Z 0 and Oy that is inherent in the last step of the iteration procedures for FLOAT Columns Entry Description and Variable Name Format 7 10 11 15 16 20 21 30 31 40 41 50 51 60 61 70 MERR A4 Enter the word MERR Structure Identifier I5 Default is jacket i e number 1 Blank Maximum Residual Error for X Movement F10 0 Enter the maximum residual error for a movement in the X direction on the last iteration The residual from the drag calculations must fall below this value for the sys
62. the per centage volume flooded would be as specified by this value Percentage of Atmospheric Pressure at MSWL Enter the percentage of atmospheric pressure before the start of the simulation One hundred percent would mean that the air pressure in the member is atmospheric before either valve is opened 1 e if the internal free surface at the start of the simula tion is at mean sea water level MSWL and the flood vent is open then gt 100 water air will initially be blown OUT OF the tube 100 NO FLOW will initially occur through the valve lt 100 Water air will initially flow INTO the tube Note On a RESTART 2 analysis the value will change At a time up to and including the opening time for either valve specified on the OPVL and CLVL cards the per centage pressure would be as specified by this value Intake Valve Node at Member Wall Enter the node that identifies the position of the intake valve at the member wall The position of the vent valve at the wall will be auto Installjac 117 I5 A16 I5 I5 5 I5 I5 Installjac SESAM 118 61 65 66 70 71 75 76 80 10 June 2010 Program version 8 1 matically corrected to lie on the wall See the CTRL VTOL card for more details A position off the end of the member or supermember see the SMEM card for details will cause an error The default is no valve is identified Intake Pipe Node I5 Enter the node which identifies the position
63. to between 30 and 100 Start of Incrementation This value controls the record number from which time incrementation starts The record number of increment n is the Start of Incrementation value plus n If omitted the start level is 0 Time Increment Installjac SESAM 52 4 6 10 June 2010 Program version 8 1 This value controls the time that elapses between equilibrium calculations Half a second 0 5 sec is usually adequate for a large jacket You might have to reduce this number for larger structures Check the Error per Timestep field on the Time History report Starting Time This value controls the start time of time incrementation The total time of an analysis is the Starting Time plus the Time Increment times the number of exe cuted increments TIME 50 0 5 0 0 Here is a example of what all the cards would look like together in the input shown below the structure data has already been generated and stored in the restart file JOB LINE NAME TFI E Launch Positioning Run OPTIONS EQON NODL END RESTART Barge and Jacket Tracks T1 2111 2112 TH 2121 2122 TA pe bad LLT TH ILZE LL22 a W Rocker Arm Description RPN1 4 0 15 0 150 0 Launch Interaction Parameters R WNCH 2 5E6 0 99 FRIC 0 04 0 05 ELF 0 0 0 0 Equilibrium Time Steps TIME 307 005 Dijo 30 0 Running the Program The
64. to compare them The Sestra sum of loads should only deviate from the Installjac track and rocker reac tions with a few if the load calculations is successful You can also view the transferred loads by reading the jacket T FEM file with loads into GeniE or Preframe and plot loads The work process for a launch load analysis will be Common models Jacket GeniE Preframe Create a jacket model as one super ele ment with supernodes along launch runners It is important that the same T FEM file used for the jacket is used as input to Installjac in the CONVERT run and as the structural model for Sestra since the beam and node numbering must be the same in Installjac and for the Sestra model Barge GeniE Preframe Create the barge as a second super ele ment This can be a full plate model or a simplified set of beams and springs that represent the stiffness of the barge The barge must have supernodes that matches the supernodes of the jacket launch runners In its simplest form the barge may be represented as a spring to Installjac SESAM 70 10 June 2010 Program version 8 1 ground in all supernodes where a jacket node is resting on the barge e Rocker arm GeniE Preframe Create a rocker arm as a third super element The rocker arm must have supernodes that matches the supernodes on the jacket for all positions you will analyse For each position where you want to calculate loads you run e Installjac Calculat
65. track Notes 1 Leave this field blank when using FLOAT 2 When the jacket is in contact with the barge and the SESAM Installjac Program version 8 1 10 June 2010 189 YAWR yaw release option HAS NOT been speci fied leave this field blank 3 When the jacket is in contact with the barge and the YAWR yaw release option HAS been specified enter the relative rotation of the jacket track with respect to the barge tracks for structure 1 The default is 0 0 degrees Installjac SESAM 190 10 June 2010 Program version 8 1 10 57 Print Every nth Timestep Card PREV This card is optional Use it to limit the volume of printout generated during a long sim ulation If you do not enter this card all timesteps are printed This is the default Columns Entry Description and Variable Name Format 7 10 PREV A4 Enter the word PREV 11 15 Timeset Increment I5 Enter the number of timesteps between each printing For example the program would output printer data at timesteps 1 6 11 16 etc if the timestep increment were 5 The default is 1 SESAM Installjac Program version 8 1 10 June 2010 191 10 58 Print No Print Cards PRNx and NOPx These cards are required for LAUNCH only Use these cards to turn printing on and off for selected LAUNCH parameters See the table below for defaults Columns Entry Description and Variable Name Format 7 10 Print Option A4 Enter PRNx To output the selected parameters NOPx To
66. umns 31 40 is blank 41 50 Blank 51 60 Hook Sheave X Coordinate FRA F10 0 Enter the X coordinate of the crane hook using the Fixed Reference Axes FRA system for sling type 1 For sling type 2 enter the X coordinate of the sheave using the fixed reference axis FRA system Leave this field blank if columns 31 40 are not blank The default is 0 0 feet or meters SESAM Installjac Program version 8 1 10 June 2010 209 61 70 Hook Sheave Y Coordinate FRA F10 0 Enter the Y coordinate of the crane hook using the Fixed Reference Axes FRA system for sling type 1 For sling type 2 enter the Y coordinate of the sheave using the Fixed Reference Axis FRA system Leave this field blank if columns 31 40 are not blank The default is 0 0 feet or meters 71 80 Hook Sheave Z Coordinate FRA F10 0 Enter the Z coordinate of the crane hook using the Fixed Reference Axes FRA system for sling type 1 For sling type 2 enter the Z coordinate of the sheave using the Fixed Reference Axis FRA system Leave this field blank if columns 31 40 are not blank The default is 0 0 feet or meters Sling Examples Case 1 If you enter the hook coordinates on the SLNx card 1 Do not enter the Crane Hook Load on the SLNx card columns 31 40 2 Do not enter the hook coordinates on the individual LINE NLIN cards SLN1 32 105 40 LINE 1 100 10000 0 50 00 LINE 1 120 10000 0 50 00 Case 2 If you enter the Crane Ho
67. value plus n If omitted the start value is 0 The number of increments that are executed is the difference between the Last Record Number and the Start of Incremen tation Time Increment F10 0 Enter the increment between time steps seconds Starting Time F10 0 Enter the start time for this analysis seconds The time at the end of the analysis is the Starting Time plus the Time Increment times the number of executed increments Installjac SESAM 216 10 June 2010 Program version 8 1 10 72 Title Cards TITLE These cards are required Use one or more TITLE cards to identify the job being ana lyzed The program will print the first TITLE card in the heading line of each page of output Enter as many TITLE cards as you want If these cards are not entered the title remains blank The TITLE cards should directly follow the JOB card Columns Entry Description and Variable Name Format 1 5 TITLE A5 Enter the word TITLE 7 66 Job Title A80 Enter title information for the job SESAM Installjac Program version 8 1 10 June 2010 217 10 73 Debugging Card TRACE This card is optional Use it to trace the program execution This card is used by sys tems support personnel to debug the program Do not use this card without specific instructions from a systems support person Debugging occurs only when this card is present Columns 1 5 7 12 13 15 16 40 41 80 Entry Description and Variable Name F
68. with extensions log and vtf respectively The extension of the input file defaults to inp if it is not specified Installjac can also be accessed from SESAM Manager through the Utility Run menu See Figure 3 14 Installjac SESAM 16 3 3 1 3 2 3 3 3 3 1 10 June 2010 Program version 8 1 Coding and Checking the Jacket and Barge Structures Why Perform this task to e Verify that the jacket and barges are coded correctly e Set some global parameters that apply to the data throughout all the tasks e Let the program calculate some initial values that are applied throughout the rest of the tasks When This is the first task that you should perform when running Installjac In the overall business of designing offshore platforms you would perform this task after you have designed the platform and analyzed it with a structural FE analysis program Getting Ready Before you begin this task you should e Understand the concept of structures in Installjac e Understand the axis systems used by Installjac e Design your structures e Prepare a stress analysis of your jacket using Sestra e Convert your jacket into an a format suitable for Installjac e Identify the barge that you are going to use for the structure Understanding Installjac Structures You can define up to three structures in Installjac Use structure 1 for the jacket and structures 2 and 3 for the barges We recommend that you use structure 1 f
69. 0 11 15 16 20 21 30 31 40 41 50 51 60 61 70 71 80 Entry Description and Variable Name DIFM Enter the word DIFM Structure Identifier Enter the number 1 2 or 3 of the structure Blank Roll Moment Amplitude Enter the amplitude of the roll moment The program uses this entry and the next one to calculate the roll moment The default is 0 pounds feet English or Newtons meter Metric Roll Moment Phase Angle Enter the phase of the roll moment The default is 0 degrees Pitch Moment Amplitude Enter the amplitude of the pitch moment The program uses this entry and the next one to calculate the pitch moment The default is 0 Pitch Moment Phase Angle Enter the phase of the pitch moment The default is 0 Yaw Moment Amplitude Enter the amplitude of the yaw moment The program uses this entry and the next one to calculate the yaw moment The default is 0 Yaw Moment Phase Angle Enter the phase of the yaw moment The default is 0 Format A4 15 F10 0 F10 0 F10 0 F10 0 F10 0 F10 0 SESAM Installjac Program version 8 1 10 June 2010 135 10 25 Viscous Drag Multiplication Factor Card DRGx This card is required If this card is not entered the Viscous Drag Multiplication Factor defaults to 1 0 Use this card to modify the viscous drag of a structure The program applies viscous drag to each hydrodynamic component of the structure Columns 7 10 11 2
70. 0 41 45 46 50 Enter the word CTRL or XYZCTRL ETUB A4 Enter the word ETUB Structure Identifier I5 default is Jacket 1 e 1 Open Flood Valve Node I5 A16 Enter the node number node name of the open flood valve This node must be at a lower elevation than the 2nd node for each structure step position 2nd Node I5 A16 Enter the node number node name that identifies the other end of the element Remember this node must be above the Open Flood Valve Node for each jacket step position Material Group I5 Enter the material group number for the element Mate rial group numbers are defined on MATE cards The den sity on the MATE card must be the density of water Geometry Group I5 Enter the geometry group number for the element Geometry group numbers are defined on GEOM cards Percentage of Atmospheric Pressure I5 Enter the percentage of atmospheric pressure inside the element in either of these two ways 1 gt 100 Unvented compartment at an air pressure greater than or equal to atmospheric pressure when the flood valve is at the mean water level MWL 2 lt 100 Unvented compartment with internal free surface coincident to MWL when air pressure is equal to atmospheric pressure SESAM Installjac Program version 8 1 10 June 2010 125 Apply node names for nodes that are read from the FEM file model when the node name concept is applied A node name is defined by the XYZFEM card and must exist before it
71. 0 Entry Description and Variable Name Format DRGx A4 Enter the word DRGx x Structure Identifier below Structure Identifier Enter the number 1 2 or 3 for x DRG1 DRG2 or DRG3 to identify the structure that you want to set the starting positions for Viscous Drag Modification Factor F10 0 The viscous drag of the structure will be multiplied by the number you enter here Installjac SESAM 136 10 June 2010 Program version 8 1 10 26 Free Floating Equilibrium Card EQON This card is optional and valid for FLOAT only A maximum of 1008 EQON STR and OB cards may be used Use this card to determine the free floating equilibrium position of a structure during a FLOAT run The option can be used to calculate the position for e A structure e Multiple control flooding cases for a structure e Multiple crane hook loads for a structure You can restrain the equilibrium position in the X Y and Z axes Columns Entry Description and Variable Name Format 7 10 EQON A4 Enter the word EQON 11 15 Starting Crane Hook Load IS 16 20 21 25 This field is used in one of three ways 1 Leave the field blank if you are not running multiple crane hook or control flooded member cases 2 Enter the number of the crane hook load to use when analyzing multiple control flooded member cases This number refers to one of the crane hook loads defined using SLN NLIN PLYN FORC LINE CWIN and FINI cards See Multiple Cont
72. 0 0000 0 0000 HYDROSTATIC 0 0000E 00 0 0000E 00 4 5653E 08 1 4228E 07 1 1888E 10 0 0000EF 00 MORISON DRAG 0 0000EF 00 0 0000EF 00 0 0000E 00 0 0000E 00 0 0000E 00 0 00000E 00 GYROSCOPIC 0 0000EF 00 0 0000EF 00 0 0000E 00 1 3288E 04 4 8054E 04 2 1537E 03 ADDED MASS MOMENTUM 0 0000EF 00 0 0000EF 00 0 0000E 00 0 0000E 00 0 0000E 00 0 0000E 00 GRAVITY 0 0000EF 00 O 0000E 00 2 9038E 08 O 0000E 00 0 0000E 00 0 0000EF 00 ROCKER PIN REACTION RPA 7 9615E 06 1 5946E 05 1 6596E 08 1 365ZE 07 3 4917E 09 4 0140E 06 ERROR PER TIMESTEP 8 7270E 08 4 5389E 08 5 6206E 07 2 4132E 07 3 1324E 07 4 7983E 08 TOTAL FORCE 2 0480E 02 1 3207E 02 1 2059E 03 2 3817E 03 2 1428E 04 5 1721E 03 CLEARANCE FROM SEA BED 114 7775 JACKET HAS OVERCOME STATIC FRICTION AND IS MOVING MOVING FORWARD Figure 5 2 Rocker pin is activated at time 0 5s 5 6 2 4 Checking the Depth of the Dive You can calculate the depth of the dive using the Clearance from Sea Bed field and the Z position of nodes that you specified on NOD cards You are actually checking two things 1 How far under the barge goes and 2 Whether or not it hits the bottom In this example the Z position of node 338 the top of the jacket closest to the sea bed is 17 9785m below the surface just after separation time 30 5s If the water depth is 114m The clearance from the seabed is 114 17 9785 96 0215m The number is not the same as that shown in the figure below because anoth
73. 0 02 0 05 0 005 0 10 MXNI 1 100 ok ok ok K ok kok K POS1 83 2221 1 4678 14 1011 0 3961 65 0301 0 1421 ok kok K 28 ADEF ES EQON 1 1 1 STRX 1 0 5 0 5 STRY 1 1 5 1 0 OBTZ 1 1 0 5 2 0 KKK K oh ok ok ok NOD1 452 oh ok ok ok oh kok ok CTRL TUBE 438 265 945 100 0 CTRL TUBE 438 265 945 72 0 CTRL TUBE 435 262 946 95 0 CTRL TUBE 435 262 946 73 0 CTRL TUBE 1 438 946 67 0 CTRL TUBE 46 435 946 73 0 oh ok ok ole ee CRANE ES SLNG 1 2 E7 LINE 1 337 0 0 1 E6 130 0 LINE 1 384 0 0 1 E6 130 0 LINE 1 381 0 0 1 E6 130 0 LINE 1 266 0 0 1 6 130 0 Figure 11 8 Upending input ex1_flot inp SESAM Installjac Program version 8 1 10 June 2010 237 Comments on upending input in Figure 11 8 e The model geometry is stored in the restart file as in the launching analysis e Default iterations settings are used here MMVE MERR For con vergence to be achieved adjustments using these options might be necessary e The position of the jacket is read from the output of the launch anal ysis ex1_Inch log i e from the time increment when the upending is to be performed e One flooding and one crane hook load combination are used here Some legs of the jacket are flooded to the percentages shown in Fig ure 11 8 and the crane hooks are attached to the top corner nodes of the jacket e 4 analyses are performed prescribed by the
74. 1 1 2 1 2 2 2 3 1 3 2 3 3 3 3 1 3 3 2 3 3 3 3 4 3 5 3 5 1 3 5 2 3 5 2 1 3 3 2 2 3 5 3 3 5 4 3 5 4 1 3 5 4 2 3 35 3 5 6 3 5 7 3 5 7 1 IZ 3 6 3 6 1 3 6 2 3 6 3 3 6 4 3 6 5 3 7 3 8 Table of Contents Introducing TS CAMPAC sas A RR ar aasa 1 Wherestt Fits A A ASIN ALG ate Sa se ee 1 ESA is at da tdt Lo 1 SC AN 2 OPUS tii sio it a dl 3 OLDEN DIU IE AEA ET Set eal eA IR een Se 3 Syst m Requirements ltd daria 3 An Overview of Jacket Launching Using Installjac o oonnconnccnocinocanocanoncnonconncnnanancrnn nono conacncnnnos 3 Using LAUNCH aeii e A a A E E A 4 Using ELOAD catador nani ara 4 About Version 7 1 00 and Later Versions oococoocccnocccoonanoonannnnccnnnnonnnnonnnnronnnnnnacnnncnnnn corn ncnnnncnnncanns 4 About Version 8 0 and Later Versions encendia ani ea aeae e i 9 Name Concepts osne ain cht dean E EE EA E E A ais ee E EE 9 A naen e a ea n e eE E eaae e AEE RAe E E E oea n AaS 10 Getting Started with Install jac oooomosmss 14 Using the Users Guide ninio piropo leona 14 How the User s Guide is Structured c coooonnconnccnocononcnoncnoncnononononnncnnn cnn nonnc conc onnnrnn crac nn nono nana e SIE 14 CONVENUIONS Mirta rd it A Woes die a 15 Accessing Instala union linia ias scouts colin Leva cg eth ibe appear ET Sra iae sis 15 Coding and Checking the Jacket and Barge Structures ccccsccssssssssssccssceseecees 16 MM Ai A AO ti On 16 O RN 16 Gettin REAL Vivid idad loro ARS 16 Underst
75. 1 30 Moment Rocker Arm 1 F10 0 Enter the moment preventing the main rocker arm from initially rotating pounds force English or Newtons Metric Installjac SESAM 202 10 June 2010 Program version 8 1 10 64 Restart Card RESTART This card is optional Use the RESTART card to bypass the processing of sections of the input data that were saved from a previous run There is no restart if a new analysis 1s assumed Columns Entry Description and Variable Name Format 1 7 RESTART A7 Enter the word RESTART 11 Restart Option Il Enter 1 To use the RESTART 1 dataset generated by a previous DATA option on the OPTIONS card The RESTART 1 file contains the structure geometry and properties The table below lists the cards that are ignored when you use a RESTART 1 Card Description ACCG Acceleration of Gravity Card FLPR Fluid Property Card GEOM Geometric Properties Cards HBNx Barge Sides Cards HBWx Barge Width Cards MATE Material Properties Cards NODE Node Coordinate Cards NSEx Non structural Element Cards STRE Structural Element Cards Table 10 4 Cards Ignored by RESTART 1 and 2 2 This option is only valid when performing a launch analy sis with the LAUNCH module It uses the RESTART 2 dataset generated by a previous Launch or Float run The RESTART 2 file contains the last computed time position and trajectory of the structures Note The starting time when using RESTART 2 wil
76. 10 0 GEOM PMAS 3265 292E GEOM PMAS 4546 750E GEOM PRIS 5 30 0 GLOBAL PARAMETERS FLPR 25 0 1000 0 ACCG 9 81 Ed oy x o o x o o Figure 3 13 Sample Cards for the Data Run Use of Name Concepts in Installjac General The concept of fixed node and element names is introduced as node and element num bers may change when updating the jacket model Use of the name concept is applica ble to identify nodes and elements of T FEM file model only The name concept can not be applied to nodes and elements generated directly in the Installjac input files Node names and element names must be defined before they can be referred to in the Installjac commands Name definitions may be included directly in the Installjac input files collected in separate input files or specified as a combination of both The names are defined once and for all and do not change with changing node and element num bering Node names and element names are converted to numbers in a pre edition phase and printed to an edited version of the current input file This updated file is used in the exe cution of Installjac Hence the core part of Installjac relates to node and element num bers and not to names while the user relates to the names Node Name Definition Node names are defined by cards XYZFEM cards A XYZFEM card contains the card name a user specified node name and three coordinate values xyz coord
77. 16 20 Maximum Number of Iterations I5 Enter the maximum number of iterations that the pro gram should perform when searching for an equilibrium condition during a FLOAT run This entry is only valid when the EQON STRX or STRY cards are used If the program does not converge in the number of itera tions entered an error message will be printed and the program will abort 21 70 Blank SESAM Program version 8 1 10 June 2010 10 48 Installjac 171 Non Linear Elastic Cable and Non Linear Sea Bed Sprint Cards NLIN XYZNLIN These cards are conditional They are used in conjunction with the PLYN card to define non linear elastic cables These cards can also be used in conjunction with the HPNT card to define the position of the hard points on a structure which use the non linear sea bed springs to calculate the force at the hard point You can use non linear elastic cables instead of linear elastic cables LINE card Columns 7 10 4 10 11 15 16 20 21 25 26 30 41 50 Entry Description and Variable Name NLIN XYZNLIN Enter the word NLIN or XYZNLIN Structure Identifier structure 1 Enter the number 1 2 or 3 of a structure Structure Attachment Node Number Node Name Enter the node number node name on structure 1 where the line is attached to the structure or the node number at the hard point Leave this field blank if this is the FIRST card of a sling assembly type 2 SLN2 1 e repre
78. 20 Acceleration of Gravity F10 0 Enter the acceleration of gravity The units must be con sistent with the units for the water density FLPR card columns 21 30 feet second or meters second See the JOB card SESAM Installjac Program version 8 1 10 June 2010 105 10 5 Added Mass Matrix Card ADDM The Added Mass Matrix Card ADDM is optional If you use this card you must remove the HBW and HBN cards for the barges Use this card or a DAMP card when wave motion dominates the launch analysis Use this card to input an Added Mass matrix This matrix has six rows and six col umns Six cards will be needed for each matrix one card per row The rows and col umns correspond to the six degrees of freedom x y and z translational freedoms and x y and z rotational freedoms Cards one two and three correspond to the x y and z translational freedom respectively Likewise cards four five and six correspond to the x y and z rotational freedoms respectively The added mass and damping ADDM DAMP are the classic forces associated with the force on the structure when the structure is moved in still water at a certain fre quency for small amplitudes These cards should be used instead of the HBN HBW cards when the displacement of the barge remains relatively constant in WAVES The frequency at which the added mass and damping are chosen should be either at the peak frequency of the wave spectrum or the natural frequency of the
79. 8 1 1949E 10 3 0200E 07 6 7879E 10 6 0256E 08 TOTAL FORCE 3 2868E 02 2 6406E 02 2 8090E 00 3 2579E 03 2 0835E 05 1 2862E 04 CLEARANCE FROM SEA BED 114 7775 Figure 4 3 Checking for equilibrium SESAM Installjac Program version 8 1 10 June 2010 55 4 7 2 2 Checking the Trim of the Barge You can use the position information for the barge to determine the trim pitch of the barge It is easiest to use if you coded the nodes for the barge using a right hand coordi nate system where the positive X direction is toward the stern of the barge The follow ing discussion assumes that the barge is coded that way The pitch of the center of gravity position of the barge should be a positive number between 2 and 2 5 Refer to the following example This means that the bow is raised A negative number would mean that the bow is down which is something not suitable Also look at the rocker pin heave Z position It should be negative Remember the position of the rocker pin at the start of the run is set by the program equal to the water line If the bow has tilted up by the end of the EQON run then the rocker pin at the stern should be under water DEGREE OF FREEDOM TIME RECORD STRUC POSITION FORCES SECS NUMBER NUMBER AND MOMENTS AT x Y Zz RX RY RZ CENTRE OF GRAVITY SURGE SWAY HEAVE ROLL PITCH YAW 0 00 60 2 POSITION coc 92 4858 0 0100 0 7775 0 0550 2 7464 0 0136 VELOCITY coc 0 0000 0 0000 0 0000 0 0002 0 0000 0 0000 ACCELERATION c
80. B XYZCTRL VTUB 00oooocccconocccononononcccnnnncnonn 116 Valve Wall Tolerance Card CTRL VTOLD ocnccnnnnnoconannnonononannnnnnononcnnonnnnnnononononccnonnnnns 119 10 14 10 15 10 16 10 17 10 18 10 19 10 20 10 21 10 22 10 23 10 24 10 25 10 26 10 27 10 28 10 29 10 30 910 31 10 32 10 33 10 34 10 35 10 36 10 37 10 38 10 39 10 40 10 41 10 42 10 43 10 44 10 45 10 46 10 47 10 48 10 49 10 50 10 51 10 52 10 53 10 54 10 55 10 56 10 57 10 58 10 59 Table of Contents Open Close Valve Times Cards CTRL OPVE CLOVUD ccococccoccnaccninancnnncnononananonncnonennnos 120 Supermembers CTRL SMEM XYZCTRL SMEM cooocccoocononcnonnnonncnonccnncnnnncconncnoncnnnos 122 Entrapped Air Card CTRL XYZCTRL ojsiccssssccceushdpeieaWeasaceeasecsadeadesdaccpadscceentessaatasente 124 Pree Flooding Card CURE OXY ZC URI oii la tindonatatina cusestan gas a Sion one E 126 Free Flooding Card CTRL XY ZC URES a tens aa bende 127 Next Step Card CTRL A aid a ade ea ue 128 Current Speed Card CURR ii NOS 129 Constant Winch Cable Card CWIN XYZCWIN ooooooocccccccnconcoonnnnnnconononnononononocconinnnnos 130 Linear Damping Matrix Card DAMP c eccsscceseseceseeeeceeeceeeteescertenceteeeeonsteeentees 131 Diffraction Force Cards DIFF cccccccsccccccececesssnsececececeesesensaseecececeesessaeeeeeeeeeeeeneas 132 Diffraction Moment Vector Cards DIEM cccccsccccssssececesseeeeeese
81. Distance from hook to jacket node Unstretched Length Note If P Pz Py Ps 0 then this is identical to a LINE cable which should be used in preference Columns Entry Description and Variable Name Format 7 10 PLYN A4 Enter the word PLYN 11 15 Blank 16 20 Blank 21 25 Blank 26 30 Blank 31 80 Cable Tension Polynomial 5E10 0 Enter up to five cable tension polynomials The program will use these in the equation above to calculate the cable tension The polynomials must be right justified in their respective input fields 31 40 41 50 51 60 61 70 and 71 80 The default is 0 0 The units are described below P Pounds feet English Newtons meter Metric P Pounds feet English Newtons meter Metric P3 Pounds feet English Newtons meter Metric P4 Pounds feet English Newtons meter Metric P5 Pounds feet English Newtons meter Metric SESAM Program version 8 1 10 June 2010 10 56 Installjac 187 Trajectory Starting Conditions Cards POSx These cards are optional Use POS cards to define the starting position of any of the structures See the Time History Report produced from a previous run to determine valid starting positions These cards use zero for all translations and rotations subject to physical boundary conditions Columns 7 10 11 20 21 30 Entry Description and Variable Name POSx Enter the word POSx x Structure Identifier below Struct
82. ESAM 44 4 5 4 4 5 4 1 4 5 4 2 4 5 5 10 June 2010 Program version 8 1 Defining Winch and Friction Data Defining Winch Data The information on the WNCH card is not used during a positioning run but must be coded if you plan to use a RESTART 2 file on your LAUNCH run The WNCH card consists of the maximum force that the winch can apply and the cut off velocity These two values are used during the LAUNCH run During a launch the program attaches a winch to the jacket at the midpoint of the launch tracks It then begins winch ing the jacket off the barge by applying the maximum force of the winch to the jacket The jacket will begin sliding off the barge The program continues to apply the maxi mum winch force until the velocity of the jacket along the launch tracks exceeds the cut off velocity The program reduces the winch force to keep the jacket moving at the cut off velocity It disconnects the winch if the winch force equals zero or if the rocker arm opens The program reconnects the winch if the relative speed of the jacket falls below the cut off velocity Here is an example of a WNCH card The best way to determine what the maximum force and threshold velocity should be is to refer to the Launch Barge Characteristics For rough estimates when the barge characteristics are unknown use a maximum force equal to about 10 percent of the weight of the jacket and a threshold velocity of 0 99 WNCH 2 5E6 0 99 The WNCH
83. ET POS1 25 440 POS2 0 0 0 0 0 1587 0 0 2 7464 0 0 POS3 VELI VEL2 VEL3 TIME INT PARAMETERS 2 NO OF INC TIME INC INITIAL RECORD NO START TIME TIME 60 0 0 0 5 0 0 PRINT EVERY LOADCASE AND SET LOAD TOLERANCE PREY 1 LTOL 0 0 0 0 0 0 Figure 11 10 Load extraction analysis input The LDOP on the OPTIONS option must be specified during a load extraction analy sis If the option FORM is specified as in Figure 11 10 above then the resulting load file L1 FEM is a formatted file Loads are auomatically concatenated to a structure file T FEM If FORM is not specified then L1 FEM is unformatted The positions of the barge and jacket at time 0secs must be specified with the POS option POS3 representing the position of a second barge together with the velocities of the three structures are set to zero This implies that a positioning analysis EQON must proceed a load extraction run The transverse element loads and the hydrostatic axial loading for the jacket at time 30s are shown in Figure 11 11 below SESAM Installjac Program version 8 1 10 June 2010 239 Figure 11 11 Element and hydrostatic axial loads at time 30s Genie Figure 11 12 Jacket and barge at separation time 30s as visualized in Xtract From Figures 11 11 and 11 12 it can be observed that the only elements loaded axially are those in the water Buoyancy forces contributing to transverse loads are also act in
84. HE DISC and PRIS slug feet or kilogram m for PMAS Ballast Valve Setting Ixz or Intake Valve Diameter F10 0 Enter the ballast valve setting 1f the Element Type col 1 L y Lg Ly 70 if the barge node is defined at the barge s COG SESAM Installjac Program version 8 1 10 June 2010 149 umns 17 20 is TUBE or SPHE Valid settings are 0 0 Sealed 1 0 Open Enter the coupling mass moment of inertia I Element Type columns 17 20 is PMAS Enter the Intake Valve Diameter for VTUB elements Leave this field blank for PRIS and DISC elements dimensionless for TUBE SPHE feet English or meters Metric for VTUB 51 60 End Cut 1 Iyy or Intake Valve Loss Coefficient F10 0 if the XZ Enter end cut 1 if the Element Type columns 17 20 is TUBE The end cut is the actual distance from the first node to the end of the element Enter the mass moment of inertia Lyy about the y axis 1f the Element Type columns 17 20 is PMAS For rect Lyy m x z2 12 for sphere I 2m1 5 1 y L Enter the Intake Valve Loss Coefficient for VTUB ele ments Note This is the OVERALL loss coefficient for the wall entry exit valve and pipe entry exit Gas flow rates exceeding Mach 2 5 cause local compressibility effects which are assumed negligible Supersonic gas flow rates will cause drastic increases in loss coefficient a It is Reynolds number independent a good assump tion except for very low flow rates re app
85. INI erer er L500 JINE Sae MES 1003 INE 1 6 1 5E6 100 INE App Lio Oy 0 0 NE lr Bj 1 DEG6 100 FIN SENL ip 29080 LINE Pp Ope a7 DE 100 INE 1 6 1 5E6 100 LINE E Teris he EG 00 UNE Ll By 1 5E6 100 FINI SINT porns 300 0 LINE pOr 1s SEG 100 LINE oir Loy 00 INE e Mars 16586 4100 LINE e Barr Le SEG 100 FLOODING SEQUENCES CTRL UBE py Dye ln 345 CTRL FINI CTRL UBE o Li Bo Ay CTRL FINI CTRL UBE Sins Ly Zp By 145 CTRL FINI CTRL UBE Ly 2p e O OO 0 oOo OO OG XY AED ED COCO O OOO 10 June 2010 10 20 50 Installjac 95 The fourth output record moves to the next EQON card It leaves the hook at 150 feet and floods 10 percent of the tube Notice that the EQON card flooding sequence starts at sequence 2 instead of 1 A 1 in this field would have produced the same results as found on the third record produced by the first EQON card Record five would leave the hook at 150 feet and flood twenty percent of the tube The last record number 6 uses the third EQON card It raises the hook to 300 feet and floods 50 percent of the tube The fourth SLN card is not used by this run Installjac SESAM 96 9 5 6 10 June 2010 Program version 8 1 Analysis Procedure of the Upending FLOAT is used once the jacket is off the barge and floating in a nearly stationary posi tion in the water FLOAT models only one structure and simulate
86. Installjac Program version 8 1 10 June 2010 163 10 42 Locked Hinge Card LOCK This card is optional This card and the FREE card are mutually exclusive Use this card to lock the hinge of an articulated barge This card is not generally used and under normal circumstances should be omitted If you do not enter this card the hinge is free Columns Entry Description and Variable Name Format 7 10 LOCK A4 Enter the word LOCK No other entry is required on this card Installjac SESAM 164 10 June 2010 Program version 8 1 10 43 Material Properties Cards MATE These cards are required if you are not using a RESTART card Use these cards to define the type of material that TUBE SPHE PBOY and PMAS elements are made of Use these cards to define the DENSITY OF THE WATER BALLAST for control flooded tubes TUBE ETUB and valve flooded tubes VTUB Define the material by giving its mass density For VTUB elements only these cards are also used to specify the density of the vent valve gas Columns Entry Description and Variable Name Format 7 10 MATE A4 Enter the word MATE 11 15 Blank 16 20 Material Number I5 Enter a unique number for each type of material 21 30 Density or Mass F10 0 Enter the mass density of the material for structural non structural TUBE elements Enter the density of the water ballast for control flooded TUBE ETUB VTUB elements Enter the mass for SPHE and PMAS ele ments Enter the mass density of
87. Nodes Nodes Elements Elements Material Material Sect properties Sect properties Other data NSE Int parameters etc Endcut Endcuts on member ends Installjac inp Complete file Install ac Figure 3 1 Installjac input files from Preframe The Axis Systems LAUNCH uses 3 axis systems only 2 of which are used in the LAUNCH Data Run The axis systems are e Fixed Reference Axis System FRA e Local System of Axis LSA e Rocker Pin Axis System RPA Installjac SESAM 18 10 June 2010 Program version 8 1 1 Fixed Reference Axis System The origin of the Fixed Reference Axis System FRA is set in the plane of the water surface The X Y plane is on the still water surface The Z axis is positive upwards out of the water This axis system remains fixed in time and space throughout the analysis This is the axis system you use when entering node coordinates A Yo Figure 3 2 Fixed Reference Axis System FRA 2 Local System of Axis Each structure has its own local axis system LSA This axis system is calcu lated by the program during the DATA run The origin of a structure s local axis system is at the center of mass of the structure Initially the LSA for each struc ture is parallel to the FRA As the jacket and barge are prepared for launch the SESAM Installjac Program version 8 1 10 June 2010 19 LSA for each structure will be rotated transformed at Jacket
88. OB LAUNCH TITLE EXAMPLE LAUNCH RUN OPTIONS STR1 PRFO NODL END RESTART 2 TIME 100 1 0 30 0 NOD1 1 2 Running the Program Type in the following on the command line or through SESAM Manager installjac exe input lt inputfile gt inp During the processing the program reads the structure block data from the RESTART 2 file It then continues the structure positioning and force calculations until all the time steps have completed Finally it generates the reports and updates the RESTART file which contains struc Installjac SESAM 74 10 June 2010 Program version 8 1 ture and position data for structure 1 only The updated RESTART file is still called a RESTART 2 file 6 6 Checking the Reports Running this option produces the same reports as the LAUNCH run It also generates a Time History report for nodes that you selected with NOD cards e Input Echo Report e Properties of Structure 1 Report e Properties of Structure 2 Report e Linear Wave Parameters for Structure 1 Report e Degree of Freedom Report e Time History of Specified Nodes You can concentrate on the Degree of Freedom Report 6 6 1 Things to Check Here are things you should check during a STR1 Run e Depth of the dive of the jacket e The velocity of the jacket 6 6 2 Time History Report This report shows the position forces and moments at the center of gravity in each of the six degrees of freedom for the st
89. OPIC 5 8639E 01 5 5700E 01 4 5363E 01 1 1513E 03 1 4296E 04 1 1310E 04 ADDED MASS INERTIA 0 0000E 00 0 0000E 00 0 0000E 00 0 0000E 00 0 0000E 00 0 0000E 00 GRAVITY 0 0000E 00 0 0000E 00 1 7664E 08 0 0000E 00 0 0000E 00 0 0000E 00 TOTAL BALLAST 0 0000E 00 0 0000E 00 2 1664E 06 3 7780E 07 1 5738E 08 0 0000E 00 TRACK WINCH FORCES 5 0000E 04 0 0000E 00 2 5000E 05 0 0000E 00 ERROR PER TIMESTEP 3274E 06 2 4583E 05 5 9401E 06 3 2903E 05 1 2324E 06 TOTAL FORCE 8 0854E 05 4 6214E 06 2 3790E 07 4 2111E 05 CLEARANCE FROM SEA BED 111 2484 4 00 9 2 POSITION COG 93 7024 0 3079 0 6654 1 4308 2 9468 0 2664 VELOCITY COG 0 2339 0 0231 0 0013 0 1144 0 0231 0 0177 ACCELERATION COG 0 0707 0 0018 0 0687 0 0081 0 0284 0 0002 POSITION ROCKER PIN 1 1454 0 6509 0 5957 1 4308 2 9468 0 2664 VELOCITY ROCKER PIN 0 2345 0 0542 0 0353 0 1144 0 0231 0 0177 ACCELERATION ROCKER PIN 0 0701 0 0018 0 0227 0 0081 0 0284 0 0002 HYDROSTATIC 0 0000E 00 0 0000E 00 4 6631E 08 3 1211E 08 1 2762E 10 0 0000E 00 MORISON DRAG 0 0000E 00 0 0000E 00 0 0000E 00 0 0000E 00 0 0000E 00 0 0000E 00 GYROSCOPIC 0 0000E 00 0 0000E 00 0 0000E 00 2 3255E 03 3 7769E 04 3 4205E 04 ADDED MASS INERTIA 0 0000E 00 j 0 0000E 00 0 0000E 00 0 0000E 00 0 0000E 00 0 0000E 00 GRAVITY 0 0000E 00 0 0000E 00 2 9038E 08 0 0000E 00 0 0000E 00 0 0000E 00 TOTAL BALLAST 0 0000E 00 0 0000E 00 0 0000E 00 0 0000E 00 0 0000E 00 0 0000E 00 ROCKER PIN REACTION R
90. PA 7 0580E 06 4 3752E 06 3 5645E 08 3 7270E 09 1 0591E 08 ERROR PER TIMESTEP 4 0072E 06y 1 0691E 064 1 9126E 05 5 9401E 06 3 2903E 05 1 2324E 06 TOTAL FORCE 1 9449E 06 9 1956E 05 2 1855E 07 9 9125E 04 CLEARANCE FROM SEA BED 114 6654 Figure 5 4 Equlibrium forces 5 6 2 8 Results Summary A summary of the times of when some events occur during the launching is written at the end of the results text file log This summary can be used for a quick review of the launching process 5 7 Visualizing the Structures and Animations Animations of the jacket and barge motions can be performed in Xtract using the gen Installjac 66 SESAM 10 June 2010 Program version 8 1 erated VTF file X Y plots of the various barge and jacket component results can be plotted using Xtract Table 5 2 below lists all the variables that can be plotted in Xtract through the menu Graph VTF Plot The results data timeseries of results vari ables are store in the file lt name gt _pl vtf for ASCII formatted vtf output and in the same file as other analysis data lt name gt vtf for binary output ASCII or binary output 1s prescribed by the FORM flag used with the OPTIONS command Series Results Description Degrees of Freedom POSCG COG position rotation X Y Z RX RY RZ VELCG COG velocity X Y Z RX RY RZ ACCCG COG acceleration X Y Z RX RY RZ POSRE Position ro
91. PA axis This field is ignored when posi tioning structure 3 degrees SESAM Installjac Program version 8 1 10 June 2010 197 10 60 Rocker Arm Mass Card RAMS This card is optional Use it to specify the mass of the rocker arm This card is usually used in conjunction with the RAXS Rocker Arm Cross Section card which describes the geometry of the rocker arm If this card is omitted the rocker arm will be consid ered weightless and the jacket will separate from the barge as soon as the trailing part of the jacket track passes the rocker pin The default is that the rocker arm is weight less implying that the RAMS and RAXS cards are not used see sect 4 5 5 for further explanation Columns Entry Description and Variable Name Format 7 10 RAMS A4 Enter the word RAMS 11 20 Rocker Arm Mass F10 0 Enter the mass of the rocker arms in a value from 0 0 to 9999999999 pounds English or kilograms Metric Note As both rocker arms rotate simultaneously they are treated as a single rocker The mass of BOTH the rocker arms on the port and starboard side should be entered Installjac 198 10 June 2010 Program version 8 1 10 61 Rocker Arm Cross Section Card RAXS SESAM This card is required if the RAMS card is input Use this card to specify the geometry of the rocker arm This card must be used in conjunction with the RAMS Rocker Arm Mass card If the RAMS card is not present this card is ignored A minimum of
92. Parasitic System of Axis the axis system such that the water surface is coincident with the X Y plane and the Z axis is directed away from the water surface You can code your structure any way you want using FRA coordinates if you are not starting from either a positioning or launching run in these cases data for the POS1 option is readily available in the log file of these analyses Before this task begins however you should rotate the structure and lay it on its side See Figure 8 1 1 The positive X direction of the FRA should be toward the top of the structure 2 The widest part of the base is in the X Y plane Installjac SESAM 84 10 June 2010 Program version 8 1 Figure 8 1 FLOAT Starting Position You position the jacket using the POS1 card This card has three entries e Z Translation e X Rotation e Y Rotation All three of these values are measured in PSA values Both the X and Y translation val ues are set to zero by the program This is because the PSA coordinate system moves with the structure so X and Y are always zero X and Y of 0 0 in the PSA is equal to the current X and Y of the center of gravity in the FRA In other words a center of gravity of 26 21 14 in the FRA is equal to 0 0 14 in the PSA FLOAT does not care about movement along the X or Y axis of the FRA or rotation about the Z axis 8 5 4 1 Z Translation For this initial positioning run we want the depth of the center of gravity the Z tran
93. Processing Steps cissscssdesescedeeees itari naear i aata sse iaai ieres tiers Eiri 94 Analysis Procedure of the Upe ding seiis eieiei teree turieni a aeea ii 96 Running the Programm occse heee aa a a E a stein a e a ashi aad basas 97 Checkine the REports isesi teaseri ecien roa nae eea eaaa r a E e Ea Eae Est 97 The Iteration Report mra e aaa a HA cis 97 The Equilibrium Report iii eri 97 Plottine the Upendine Sequence sisiane a n e tt 98 Describing Installjac Cards eessssssseesscecssocesocesoocessccssocssocesooessosssocessecesocesoosssosssseessose 99 FEM file Conversion Cards miii ld 100 Comment Cards C885 OIE tates cendawteneasaes veoedbbegies Aa cias 101 Starting Acceleration Cards ACE al 102 Acceleration of Gravity Card ACCG at Qt uea deed eee 104 Added Mass Matrix Card ADDM ooccconconnonnnononcnnnnnnnononononncnonnnnnonnnnncononnnnononononccnoninnnnns 105 Added Mass Multiplication Factor Cards AMSX sssssssesssssssssssssesssesssssessseesseessesssee 107 Hinge Axis Card AXIS XY GAMES Pi A a 108 Barge Track Cards BLTx XYZBLTX seesseeeseseesseesseessersseressseessressersseeesseesssressresse 109 Default Current Direction Card CDRN s sssssssssseesssssseessesssssseseoeesssssseserersesssssseree 111 Current Profile Card CPR oo cccncnnnconcoononnnononncncnnnnnnonononcononnnn no E ATONE aTi 112 Control Flooded Tube Cards CTRL TUBE XYZCTRL TUBE ccooooocccncnoconcninonnncnons 113 Valve Flooded Members CTRL VTU
94. Run OPTIONS NODL END RESTART 1 x Starting Position POS1 0 0 90 0 90 0 Print Node Positions NOD1 2 5 30 32 Equilibrium EQON Figure 8 2 Sample Cards for the FLOAT Equilibrium Run Running the Program Type in the following on the command line or through SESAM Manager installjac exe input lt inputfile gt inp During the processing the program reads the structure block data from the RESTART 1 file installjac res It then moves the jacket to the starting position and repeats the equilibrium calculations until the jacket reaches an equilibrium position or until all the iterations have completed Processing stops when the structure reaches an equilibrium position Finally the program generates the reports and updates the RESTART file which con tains the structure block data and position data Installjac SESAM 86 8 7 8 7 1 8 7 1 1 8 7 1 2 8 7 2 10 June 2010 Program version 8 1 Checking the Reports Running the program with the EQON card and NODL option produces these reports e Position of User Requested Nodes e Reports of Position and Properties of Structure for Each Iteration e Reports of Position and Properties When the Structure is in Equilib rium e Nodal Coordinates You can ignore the Position of User Requested Nodes Report It gives the starting posi tions of the nodes you requested on the NOD1 card The Iteration Report This report s
95. TRX Y To calculate the hydrostatic moments on the structure as it is rotated about the Y axis STRY 11 15 Starting Crane Hook Load I5 This field is used in one of three ways 1 Leave the field blank if you are not running multiple crane hook cases 2 Enter the number of the crane hook load to use when analyzing multiple crane hook cases This number refers to one of the crane hook loads defined using SENx NLIN PLYN FORC LINE CWIN and FINI cards See Multiple Control Flooding Analysis Example in the FINI card description 3 Enter the first crane hook load case to run when ana lyzing multiple crane hook load cases See Multiple Crane Hook Analysis Example in the FINI card description 16 20 Blank 21 25 Starting Control Flooded Member Case 15 This field is used in one of three ways 1 Leave the field blank if you are not running multiple control flooded member cases 2 Enter the number of the control flooded member case to use when analyzing multiple crane hook loads Installjac SESAM 212 10 June 2010 Program version 8 1 This number refers to one of the control flooded members defined using TUBE ETUB OPEN CLOS and FINI cards See Multiple Crane Hook Analysis Example in the FINI card description 3 Enter the first control flooded member case to run when analyzing multiple control flooded member cases See Multiple Control Flooding Analysis Example in the FINI card description
96. These cards are required for a positioning or launch run of the LAUNCH option or for FLOAT combination runs Use this card to define the launch tracks on the jacket Refer to the restrictions listed for the BLT cards Columns Entry Description and Variable Name Format 7 10 4 10 JLTx XYZJLTx A4 A7 Enter the word JLTx or XYZJLTx x Structure Number below Track Identifier For x enter A for the first track or B for the second track JLTA JLTB 11 15 1st Node I5 A16 Enter the number name of the first node of the track For a standard rear launch this node should be toward the top of the jacket The program will position this node such that it is coincident with the first node on the first barge track 16 20 2nd Node I5 A16 Enter the number name of the end node of the track For a standard rear launch this node should be toward the base of the jacket Apply node names for nodes that are read from the FEM file model when the node name concept is applied A node name is defined by the XYZFEM card and must exist before it is applied If a node name is not found an echo of the name is printed The present card may contain a mix of user defined node numbers and node names of the FEM file model When the card name has the prefix XYZ i e XYZJLTx a message is printed to the Installjac MLG file if the node name is not found node name not defined or user node number applied No message is printed when the word JLTx is ap
97. XYZFEM XYZFEM Joint_97 37 0 8 46 16 5 XYZFEM Joint_549 14 75 22 0 16 5 XYZFEM Joint_203 SSL 773 17 0 2 54971 XYZFEM cards printed as comment cards in the restart inp and restart2 inp files con taining the translated input XYZFEM Joint_97 3d Di 8 46 6 3 xxx XYZFEM Joint_549 LA 22205 16i05 xxx XYZFEM Joint_203 3 17 135 17 0 2 54971 SESAM Installjac Program version 8 1 10 June 2010 229 11 Examples This chapter describes some examples that use most of the Installjac options cards listed in the previous chapter Only parts of the input files are shown The complete set of files for the various examples can be obtained by request from DNV Software 11 1 Example 1 The model consists of the following Jacket modelled in Preframe and consisting of 950 tube elements Barge modelled using Installjac options The following analyses are performed e Positioning of the barge jacket on the barge and iterating to a starting equilibrium posi tion e Launching the jacket from the barge e Upending the jacket to a final position using a hook loading and flooding of some members e Extracting member loads at various stages times during the launch process i e creat ing a FEM file for stress analysis Installjac SESAM 230 10 June 2010 Program version 8 1 11 1 1 Positioning The jacket model used is shown in a Genie window below Tee A j NA AN Fig 11 1 G
98. Z only the structure so that the center of buoyancy is below above the center of gravity i e equilibrates the struc ture 2 Prints the iteration and equilibrium reports Installjac 82 10 June 2010 After the run you should 8 5 The following table lists all of the cards that the program uses during a Jacket Equilib Program version 8 1 Check the results using the reports generated by the program Entering Jacket Equilibrium Run Cards rium run The table is followed by instructions for completing the cards Card Description Status JOB Job Card Required TITLE Title Cards Optional db Comment Cards Optional OPTIONS Options Cards Required RESTART RESTART Card Conditional MMVE Maximum Movement per Iteration Card Required MERR Maximum Residual Error Card Required MXNI Maximum Number of Iterations Card Required POS1 Jacket Trajectory Starting Condition Card Conditional EQON Free Floating Equilibrium Card Required HYD1 Buoyancy Multiplication Factor Card Required NOD Node Printing Cards Optional PRN NOP Print No Print Cards Required Table 8 1 FLOAT Positioning Run Cards The RESTART card is conditional because you can do a Positioning run without it If you leave it out however you must include all the cards that would normally go in a Data Run Although these cards are required they may be omitted and the defaults are used 8 5 1 Setting Job Opt
99. Za Rocker arm 3 Rocker pin 3 Figure 4 5 RPA system Xp yp Zp during opening of rocker arms 1 2 and 3 Installjac SESAM 50 10 June 2010 Program version 8 1 Port side M tarboard Starboard side 8 Figure 4 6 Port side and starboard side mass of rocker arm Cross sections ports side Za Port side Starboard side 8 Cross sections starboard side Figure 4 7 Port side and starboard side cross sections The centre of gravity of the port and starboard side where the rocker arm masses act are calculated on basis of density of rocker arm material and parameters of the RAXS cards i e distances of cross sections to the main rocker pin Xp and volumes associ ated with the cross sections The volumes are taken as the mass areas A multiplied with distances between cross sections SESAM Installjac Program version 8 1 10 June 2010 51 4 5 4 3 4 5 6 Inertia properties of the rocker arm are derived by using longitudinal I beam elements representing the port and starboard rocker arm sides one at each side The beams are divided into segments between the cross sections entered on the RAX cards Section properties of the beam segments are established on basis of cross section data at each of the end of the segments Mass and inertia properties of the rocker arm are related only to the main rocker arm and calculated once and for all during the input preparation phase Effects from open ing of the rocker
100. ace where a crane would be hooked to the jacket Blank Blank Magnitude of Force Component E10 0 Enter the amount of force that the crane hook applies to the structure The default is 0 0 pounds English or Newtons Metric Blank The next three fields specify the direction of the force If all three are omitted the direction defaults to vertical If a non vertical direction is specified in FLOAT only the vertical com ponent will be used 51 60 61 70 71 80 Hook X Dir Component F10 0 The default is 0 0 Hook Y Dir Component F10 0 The default is 0 0 Hook Z Dir Component F10 0 The default is 1 0 if X and Y are 0 0 otherwise it is 0 0 Apply node names for nodes that are read from the FEM file model when the node name concept is applied A node name is defined by the XYZFEM card and must exist before it is applied If a node name is not found an echo of the name is printed The present card may contain a mix of user defined node numbers and node names of the FEM file model Installjac SESAM 144 10 June 2010 Program version 8 1 When the card name has the prefix XYZ 1 e XYZFORC a message is printed to the Installjac MLG file if the node name is not found node name not defined or user node number applied No message is printed when the word FORC is applied SESAM Installjac Program version 8 1 10 June 2010 145 10 31 Free Hinge Card FREE This card is required This card and the LOCK card are m
101. ag calculations must fall below this value for the system to be considered in equilibrium degrees SESAM Installjac Program version 8 1 10 June 2010 167 10 45 Maximum Movement Increment per Iteration Card MMVE This card is optional and is valid only when an EQON STRX or STRY card is speci fied during a FLOAT run All defaults for this card are used if this card is not entered during a FLOAT run Use this card to set the maximum movement increments for Z and 9 The criteria for the values is that the hydrostatic properties should not alter significantly for a single movement Columns Entry Description and Variable Name Format 7 10 11 15 16 20 21 30 31 40 41 50 51 60 MMVE A4 Enter the word MMVE Structure Identifier I5 Default is jacket i e number 1 Blank X Maximum Movement F10 0 Enter the maximum movement per increment of the jacket along the X axis feet or meters NB Not relevant but defaults to same value as Z Maxi mum default Y Maximum Movement F10 0 Enter the maximum movement per increment of the jacket along the Y axis feet or meters NB Not relevant but defaults to same value as Z Maxi mum default Z Maximum Movement F10 0 Enter the maximum movement per increment of the jacket along the Z axis feet or meters The default is Y R where R Acceleration of gravity 9 81 32 18 for Eng lish units y1 0 20 x sqrt L x Lyy L 3m m Mass Note
102. al and valid for LAUNCH only If this card is not entered no warning messages will be issued This card is new and has the following user input description Valve Wall Tolerance Use this member to specify a tolerance accuracy for specifications of the position of the intake vent valves on the CTRL VTUB cards If the position is not within this distance a message will be output stating the error in terms of the internal radius of the member 1 e correct position 1 0 and the pro gram will continue If the user does not specify a tolerance the program will do the correction but issue no warning messages The corrected coordinate together with the distance is output on the line printer Columns Entry Description and Variable Name Format 7 10 CTRL A4 Enter the word CTRL 12 15 VTOL A4 Enter the word VTOL 16 20 Structure Identifier I5 default is Jacket i e 1 21 30 Tolerance F10 0 Enter the tolerance as a fraction of the internal radius of the member The default is 0 01 Example If the member radius 1 Oft Tolerance value entered 1 The tolerance distance would be 1 ft i e if any valve position specified by the valve wall node on the VTUB card is more than a foot from the wall then a warning message would be issued Note Do not enter a value less than 0 01 as this is the minimum value accepted by the program Installjac SESAM 120 10 June 2010 Program version 8 1 10 14 Open Close Valve Times Cards
103. alljac SESAM 208 10 June 2010 Program version 8 1 10 68 Sling Assembly Card SLNx This card is optional Use it to attach a number of linear or non linear elastic cables from a single crane hook to nodes on the structure The program allows two ways of entering data on the SLNx card You can enter the hook coordinates on the SLNx card in which case the hook load will be calculated by the program or you can enter the hook load in which case the hook coordinates will be calculated Columns Entry Description and Variable Name Format 7 10 SLNx A4 Enter the word SLNx x Sling Type below Sling Type For x enter the type of sling 0 No line between the sheave and the hook Hook force specified SLNO 1 No line between the sheave and the hook Hook position specified SLN1 2 A single line between the sheave and the hook SLN2 Note If a type 2 is specified the first LINE or NLIN card input after the SLN card will be considered as con necting the hook and the sheave The hook force and position are not known and are not to be specified below 11 15 Blank 16 20 Blank 21 25 Blank 26 30 Blank 31 40 Crane Hook Load E10 0 Enter the load applied at the crane hook Leave this field blank if you specify the hook coordinates on this card If you enter the hook load the program will calculate the hook position pounds English or newtons Metric Enter data in the following three fields if the Crane Hook Load entry col
104. alljac SESAM 222 10 June 2010 Program version 8 1 10 77 Wave Parameters Use the commands WDEF ADDM DAMP DIFF and DIEM see old deck group 15 in table 1 1 to determine whether or not to perform the LAUNCH analysis in still water Note We recommend that you use the enhanced barge model using elements and commands described in the Old Deck group 5 2 when executing the launch in waves These elements contribute to the Froude Krylov hydrodynamic pres sure loads in waves to augment hydrodynamic barge elements input through commands described in Old Deck group 5 3 and hydrodynamic barge loading input directly through old Deck groups 15B and 15C The following table summarizes the influence of each element in the equations of motion TUBE SPHE PRIS PBOY PMAS DISC TRIA TRAP TPPL QPPL Still Water and Wave Analysis Structural Mass X X X Hydrodynamic Mass X X X X X Hydrostatic Force X X X X X X Morison Drag Force X X X X X Slam Force Wave Analysis Only Wave Inertia Force X X X X X Froude Krylov Force X X X X X Table 10 6 LAUNCH Structure Elements List of element contributions to force components within the equations of motion 1 All elements loads except for PRIS are based on the local instantaneous water surface elevation and water particle velocities and accelerations 2 All elements should be subdivided by the user so that no
105. analysis Stiffness and for forces are formed according to the position and load con dition at current step to be solved At each step the equation system is checked for singularity First an eigenvalue calculation is performed to detect possible singularity Secondly if the eigenvalue test is passed successfully sufficient stiffness is checked for during the solution of the equation system A solution component has insufficient stiffness when the stiffness is less than a prescribed minimum value Default value may be applied or specified by the MERR command When an insufficient stiffness is detected for a component the incremental motion stiffness and force values of this component are put to zero If at the same time the force component is above a related minimum value a message is printed on the log file Analysis Warning INSUFFICIENT STIFFNESS IN RY PITCH STRUCTURE 1 MOTION CONSTRAINED IN THIS DIRECTION FOR THIS ITERATION When moving to a new position the singularity detected may disappear due to updated calculation of stiffness and forces Iterations are carried out until the residuals of all components of the equation system have converged or the maximum number of itera tions is reached Calculating a position of equilibrium is done by a number of linear steps A stable solu tion requires that the system is linear from one iteration step to the next The buoyancy force vector during the upending is however not linear Th
106. analysis is started either through Manager Figure 3 14 or by typing in the follow ing on the command line installjac exe input lt inputfile gt inp During the processing the program reads the structure block data from the RESTART 1file It then mates the structures and repeats the equilibrium calculations until all the time steps have completed Note The time remains constant at zero seconds Finally the program generates the reports and updates the RESTART file which con tains the structure block data plus the track rocker arm winch force restraint and position data The updated RESTART file is called a RESTART 2 file SESAM Program version 8 1 10 June 2010 53 4 7 4 7 1 4 7 2 Installjac Checking the Reports Running the program with the EQON option produces these reports Input Echo Report Properties of Structure 1 Report Properties of Structure 2 Report Linear Wave Parameters for Structure 1 Report The Time History Report Ignore the first four and concentrate on the Degree of Freedom Report Time History Report This report shows the position forces and moments at the center of gravity in each of the six degrees of freedom for both structures at each timestep We use this report to Determine if the jacket and barge combination has reached an equi librium position Check the trim of the barge Rules of Thumb Use the following rules of thumb to determine if your structures are rea
107. and hydro static displacement forces only SYMX X symmetry specification for use with TPPL and QPPL types of barge defini tions SYMY Y symmetry specification for use with TPPL and QPPL types of barge defini tions Note Leave columns 16 80 blank on this card when element type is SYMX SYMY With these options the user may specify 1 4 or 1 2 symmetry to produce elements for one portion of the structure SESAM Installjac Program version 8 1 10 June 2010 177 The program will generate the rest auto matically Table reference at the end of this card to see which additional entries are required for each type of element 16 20 Element number Enter element number If blank zero 0 is printed for the user element number in the log file 21 25 1st node I5 A16 Enter the number name of the first node of the element This number must match one of the node numbers in col umns 16 20 of the NODE card 26 30 2nd node I5 A16 Enter the number name of the second node of TUBE PRIS DISC TRIA TPPL and QPPL elements Leave this field blank for SPHE PBOY and PMAS elements This number must match one of the node numbers in col umns 16 20 of the NODE card 31 35 3rd node I5 A16 Enter the number name of the third node of PRIS TRIA TPPL and QPPL elements Leave this field blank for TUBE SPHE PBOY PMAS and DISC elements This number must match one of the node numbers in col umns 16 20 of the NODE card 36 40 M
108. anding Installjac Structures oooconcnincnnonnnccconncnnnnnnnonncn noc nonnncnnn nena cnn nc non cnn nnnanonn crono rn nanncons 16 Jacket model from Preframe Or Genie c ooooconoccncccnoconononancnnnconannnonan non no no nono conc nana ran cnn nac nnnnn cra ninncons 17 The AXIS SYSteMS ois ess feiss sgedtsts oh orilla aaa a e O e aaa haan aalon dei ii 17 Task Outline eii ninia sida cidade Sibila leerlos debio bill 20 Entering LAUNCH Data Run Cards cerco e a e verear aTa riales nds abans cda 20 Setting JODO pons id line 21 Building Structures iii older Howes sedate iadetes labels a E e E eaa a e sable has 21 Entering Node Coordinates ccoo A cea 22 Element TYPES renkor rae i eri aE Aata Ae uee loeanscacescsesuersauacennscdeunsaaeMoey 24 Entering Jacket Elements iii na 25 Describing arBaiiaa tt nit tdt stc 26 Hydrostatic Barge Description civilidad dida 26 Hydrodynamic Barge Description oniinn enna eae teiar e aR eei tireedi 29 Material Properties tina liado 30 Geometrie Properes muii it id dt eta 30 Global Parameters unicas loci decisorio i adv castle asaf also 31 Flow ParaMet ls uste ni iaa tios a a 31 Gravity Card scsi ee easiness 31 Use of Name Concepts in Installjac 0 eeceesceeseceseceseeeeeeeseesaeceaeceeeseaeeeasceaecaeseeeseeeeaaecnaenes 32 Gren iii A cee IAE IO DAA canada AA ART 32 Node Name DEMI a add 32 Element Name Definition eese eei ereenn eera e Eea n ee raae eaoin ee EES Sn EEE SEE A SaS 33 Use of Node and Element Names in t
109. ards to specify the width of barge structures This card is used in conjunction with the HBN card to describe the barge hydrodynamic model i e added mass drag and slam forces Columns Entry Description and Variable Name Format 7 10 HBWx A4 Enter the word HBWx x Structure Number below Structure Number For x enter the number of the structure you are defining 1 2 or 3 HBW1 HBW2 or HBW3 Structure 1 is usu ally a jacket Structures 2 and 3 are usually barges If structure 1 is a jacket this number must be either 2 or 3 11 20 Barge Width F10 0 Enter the distance between the sides of the barge Width must be gt 0 or an error message will be generated feet or meters Note Units are based on the units of measure field entered on the JOB card Installjac 156 10 37 10 June 2010 Program version 8 1 SESAM Hard Points Sea Bed Springs Card HPNT This card is optional Use it to specify that the contact with the sea bed of a part of the structure required a force to be applied to the structure at the point of contact with the sea bed This card is used with the NLIN non linear card A corresponding NLIN card must be input for each hard point to be defined e g with four legs in contact with the sea bed a single HPNT card could be used to define the sea bed coefficients and four NLIN card would then be used to define the position of the hard points at the bottom of each leg The default is th
110. arms during the launching are disregarded Installjac handles the rocker arm as a separated structure identity in addition to the barge and jacket Mass and inertia properties of the rocker arm are added directly into arrays of the total system and are not included as structure parts of the barge Thus the rocker are mass shall not be added to the NODE and MATE cards applied for the barge and similar the inertia properties of the rocker arm shall not be added to the GEOM PMAS cards applied for the barge Quadrilateral pressure plates QPPL elements are created for the rocker arm cross sec tions during the launch analysis to take hydrostatic drag and added mass forces acting on the submerged parts of the rocker arm Launch Restraints This card contains two values 1 The force normal to the rocker 2 The moment preventing the main rocker arm from rotating We occasionally use this card to make a clean transition for sensitive launch problems The data from this card is used during a Launch run Just enter the card name RELF and the program will use the defaults RELF Setting Time Integration Parameters The Time Integration Parameters card controls how long the program will run when trying to find the equilibrium position of the barge and jacket combination It has four inputs Last Increment This value controls the record number of the last time increment the program will calculate in the analysis Typically you will set this
111. at no force is applied when the structure makes contact with the sea bed Columns 7 10 11 15 16 20 21 25 26 30 31 40 41 50 Entry Description and Variable Name HPNT Enter the word HPNT Blank Blank Blank Blank Sea Bed Spring Stiffness Enter a stiffness of the sea bed spring Note If too high a stiffness is used the timestep will be limited for launch Very high values should not be used in FLOAT as this may affect the convergence of Stability and Equilibrium analyses Approximate values recommended for LAUNCH are as follows Stiffness m mass of structure 6m 2 5m 10 0m Maximum time step recommended 4sec 0 2sec 0 1sec A stiffness of 10m is the maximum recommended for FLOAT pound foot English or newtons Metric Static Coefficient of Friction Enter a static coefficient of friction related to horizontal motion along the sea bed in any value from 0 1 to 1 0 The default is 0 5 dimensionless The following field should be left blank for FLOAT 51 60 Dynamic Coefficient of Friction Enter the dynamic coefficient of friction related to hori Format A4 F10 0 F10 0 F10 0 SESAM Installjac Program version 8 1 10 June 2010 157 zontal motion along the sea bed in value from 0 1 to 1 0 The dynamic coefficient of friction must be less than the static coefficient of friction This entry is valid for LAUNCH only The default is 0 5 dimensionless 61 70 Static Velocity Limit F10 0
112. aterial Group Number I5 Enter the material group number for TUBE SPHE PBOY and PMAS elements This number must match a material group that was entered in columns 16 20 of the MATE card Leave this field blank for PRIS DISC TRIA and TPPL elements Enter the fourth node number instead of the Material Group Number for QPPL elements This number must match one of the node numbers in columns 16 20 of the NODE card 41 45 Geometry Group Number I5 Enter the geometry group number for TUBE SPHE PRIS PMAS DISC and TRIA elements This number must match a geometry group that was entered in col Installjac SESAM 178 10 June 2010 Program version 8 1 umns 16 20 of the GEOM card Leave this field blank for PBOY TPPL and QPPL ele ments 46 50 Select Member for Load Output A4 Enter the word LOAD This option is required if an LDOP option is used This field enables only selected members to be output thereby significantly increasing the efficiency of a load post pro cessing analysis If this field is omitted for all elements all TUBEs would be output with the selected forces If one or more fields are used only those elements indi cated would be output If any other member uses this field the loads on this member will not be output 51 55 Select NSE Member for Load Transfer A4 Only for tubular beam elements Enter the word OPLD for orthogonal projected load transfer or PPLD for proportional projected load transfer T
113. ation of the model data and endcut values are thus required l Endcut Figure 1 2 Endcut of a brace element at a tubular joint SESAM Installjac Program version 8 1 10 June 2010 11 This problem is avoided when element eccentricities are applied By means of element eccentricities the element ends are correctly placed at the surface of the chord elements are element lengths are correctly calculated without being negative see Fig 1 3 The nodes are still at the centre line The actual elements are moved into position by beam eccentricities Figure 1 3 Eccentricities by GeniE modelled braces with gap and flushed to can Installjac SESAM 12 10 June 2010 Program version 8 1 The use of element eccentricities requires that the model must be established by Genie and that the eccentricities are correctly established by flushing braces and stub ele ments at joint connections to the surface of the chord elements Eccentricities are read and saved during the process of converting FEM file model data to Installjac input The option ECCENT is required on the JOB card i e JOB LAUNCH CONVERT ECCENT The user may select between using eccentricities or endcuts The default is using end cuts If ECCENT is not present on the JOB card endcuts are assumed When eccentricities are used the whole model generation may be established by Genie and there is no need for Preframe to establish endcut values When endcuts and ecce
114. atter angle In other words it should be less than ninety degrees The Equilibrium Report This report shows information about the structure in its equilibrium position First check the Clearance From Sea Bed field This number should be positive It is mea SESAM Installjac Program version 8 1 10 June 2010 87 8 7 3 8 8 sured from the deepest point on the structure and takes the diameter of the member into account The Depth and Rotation field directly below the Clearance field repeat the final position from the Iteration Report The weight and buoyancy numbers in item five 5 on this report should match the weight and buoyancy figures from the Mass and Displaced Volume report generated by the Data Run The Nodal Coordinates Report The Iteration report gives an analysis warning message if the structure is completely submerged You can check the positions of nodes to tell how deep certain members are submerged Note The node positions are at the center of the member Plotting the Equilibrium Position The various iteration stages can be animated in Xtract The equilibrium position of the jacket is visualized as the last animation step in Xtract Installjac SESAM 88 9 9 1 9 2 9 3 9 4 10 June 2010 Program version 8 1 Upending a Jacket Why This task describes how to use crane hook and controlled flooding cards to upend a jacket You run this task to investigate different flooding sequences When
115. ay be placed directly in the Installjac input files or collected in a sep arate file that is read A combination is also possible When a separate file is applied the file is read when the JOB card contains the CON VERT option and a FEM file conversion card MINP followed by the file name is included JOB LAUNCH CONVERT ECCENT MINP xyzele inp When reading the xyzele inp file element names are converted to element numbers and the element name element number relations are saved for later use in the Installjac execution and for restart runs The same conversion and saving takes place when XYZELE cards are entered directly into the Installjac input files However the core part of Installjac does not relate to these cards and will thus printed as comment cards to edited input file that is applied in the actual Installjac execution 1 e User input file XYZELE Ele_70 Joint_48 Joint_34 Edit input file read by the core part of Installjac X XYZELE Ele_70 Joint_48 Joint_34 Use of Node and Element Names in the Installjac Input Descrip tion Node and element numbers of the Installjac input cards are replaced by names as shown below when the naming concept is applied Cards with node names JLTA Joint_2731 Joint_3051 JLTB Joint_3841 Joint_3531 Cards with element names CTRL OPEN 1 Ele 1 Ele_1100 Ele 70 Ele 244 CTRL CLOS 1 Ele _ 1 Ele _1100 Ele 70 Ele _ 244
116. barge by winching or jacking it along the launch tracks toward the rocker arm During the launch the jacket usually will begin to slide under its own weight the winch force is then removed Once the jacket is on the rocker arm it then begins to rotate or pitch into the water The rocker arm also rotates with the jacket which eventually slides separates from the barge into the water LAUNCH enables you to simulate the trajectory of the jacket and the barge throughout this sequence You must provide hydrostatic and hydrodynamic models of both struc tures as well as a description of the track system used in the launch Using FLOAT FLOAT is used once the jacket is off the barge and floating in a nearly stationary posi tion in the water FLOAT simulates the free floating characteristics of the jacket and is also used during the upending of a jacket Although LAUNCH models both the barge and the jacket FLOAT models only one structure usually the jacket You prepare the data for FLOAT the same way you prepare it for LAUNCH You must provide a hydrostatic model of the jacket and this model can be simplified for use with LAUNCH FLOAT calculates only hydrostatic equilibrium and does not account for wave eleva tion FLOAT calculates a number of equilibrium positions not time steps as in the LAUNCH analysis in a iterative procedure Residual forces and stability of the equa tion system are checked and motion controlled for each iteration to
117. barge during a LAUNCH run Make sure that the structures are not going to collide This task is invalid when running FLOAT This task can be combined with Launching a Jacket in the same input file 6 3 Task Outline During this task you will 4 5 Enter the job task data using JOB OPTIONS and RESTART cards You will also set time step and print options When you execute the program it Starts at the last position calculated in the LAUNCH run Calculates new positions velocities and accelerations for each new timestep Updates the RESTART 2 file and removes structures 2 and 3 Generates the graphics file Generates the reports After the run you should verify that the structure has reached a stable position and is ready for upending 6 4 Entering Cards This run is like the LAUNCH run in many ways It uses the same cards see Table 5 1 Installjac SESAM 72 6 4 1 6 4 2 6 4 3 10 June 2010 Program version 8 1 It generates the same reports We really only need to modify the OPTIONS TIME and NOD cards to get a successful run Setting Job Options Set the job options by entering data on the JOB and OPTIONS cards In the following example the JOB card tells the program that you are preparing a LAUNCH run Leave the rest of the columns blank to default to the new data format and Metric units Enter the following on the OPTIONS card STR1 Removes structures 2 and 3 and continues to comp
118. can be used for subsequent run JINP Jacket FEM file BINP Barge FEM file at present a dummy file can also be empty EINP Endcut input file NINP Node name input file of FEM file nodes MINP Element name input file of FEM file elements OINP File with other options not generated from FEM files Columns 1 4 Columns 6 80 Format Card ID A4 Name of file extension A76 SESAM Installjac Program version 8 1 10 June 2010 101 10 2 Columns 1 4 5 80 Comment Cards Comment cards are optional Use Comment cards to enter comments about your data Comment cards can appear anywhere in your data Enter as many Comment cards as you want Entry Description and Variable Name Format Card Type Identifier A4 Enter four asterisks in columns 1 4 to mark the beginning of a comment card Comment Area A76 Enter your comments in columns 5 80 Installjac SESAM 102 10 3 10 June 2010 Program version 8 1 Starting Acceleration Cards ACCx The Starting Acceleration cards ACC are optional and valid for LAUNCH only Use these cards to define the starting acceleration for structures during LAUNCH Note The ACC cards are not normally used by the user This task provides a means of overriding the dynamic equilibrium equations for a load s post processing run i e the user specifies the accelerations instead of the program calculating them This task is functional only if the LDOP option is used b
119. card to identify the hull joint nodes that make up one side of the barge These nodes will be projected across the barge according to the barge width entered on the HBWx card to describe the barge outline Plates are then assumed to exist on the surfaces of the barge defined by this outline From these plates the hydrodynamic model properties added mass drag and slam forces of the barge may be obtained Columns 7 10 4 10 11 70 Entry Description and Variable Name Format HBNx XYZHBNx A4 A7 Enter the word HBNx or XYZHBNx x Structure Identifier below Structure Number For x enter the number of the structure you are defining 1 2 or 3 HBN1 HBN2 or HBN3 Structure 1 is usu ally a jacket Structures 2 and 3 are usually barges If structure 1 is a jacket this number must be either 2 or 3 Node numbers Node Names 1215 Enter the node numbers node names describing the hull joints on one side of the barge Matching nodes must be found in columns 16 20 of the NODE cards Additional Information The node numbers must meet these conditions 1 The surface generated between the first and last node entered describes the deck 2 The first two nodes entered and the last two nodes entered must be at right angles to the deck A minimum of four nodes must be specified 4 All nodes must fall between and below the first and last nodes entered 5 Viewing the side of the barge from the outside enter the nodes
120. cket We call these structural tube elements because these are the only elements for which we can generate FEM loads Columns Entry Description and Variable Name Format 7 10 4 10 STRE XYZSTRE A4 A7 12 15 16 20 21 25 26 30 31 35 36 40 41 45 46 50 Enter the word STRE or XYZSTRE TUBE A4 Enter the word TUBE Element number Enter element number If blank zero 0 is printed for the user element number in the log file Beginning Node I5 A16 Enter the number name of the node at the beginning of the tube This number must correspond to a node number columns 16 21 on one of the NODE cards Ending Node I5 A16 Enter the number name of the node at the end of the tube This number must correspond to a node number columns 16 21 on one of the NODE cards Blank Material Group Number I5 Enter the material group number for the tube This num ber must match a material group that is entered in col umns 7 10 of MATE cards Geometry Group Number I5 Enter the geometry group number for the tube This number must match a geometry group that is entered in columns 7 10 of a GEOM cards Select Member for Load Output A4 Enter the word LOAD This option is required if an LDOP option is used This field enables only loads on selected members to be writ ten If this field is omitted for all elements all TUBEs would be output with the selected forces If one or more fields are used only loads on
121. coson eer Doe a oae e PER AE Erra EERE ITE TEN 85 Runnings th Prost nidad odia 85 Checking the Reports malta 86 The Teration Report errena ives tosis tahestr etleanss deisteedetes deta tes ves cedutessdeeies s 04 bes lon Sa eieae aN 86 Checking for Fquil brains inicias ii caveat sheod Hagens spain 86 Checking the Trim of the Jacket ainia sins ui nied ent et ee ida ieee 86 Phe Equilibrium Reporte teta ii ta 86 The Nodal Coordinates Report cnica lit 87 Plotting the Equilibrium Position cece ceecsseeseeeseceseceseeeseeeseesaeceseceeeseaeeeaecsaecsaeeeeeeseeeaaeenaeens 87 Upped a Jak AAA cndasudascuattovi adetesessivcscviudatecs 88 O A ab ea ta e te we ae Deiat tamed eae nta eet 88 Wien rai eee 88 Getting R ady cciacivan ii tdi an 88 Tas Outline ti dto Mati 88 Enterins Upendins Run Cards ario actores tous ashton cdots e eE pe Ee ee aa oa aoar Tears ISEEN 89 Setting JOD OPNS kisesi ineine sine epei eaat EN e rita debi 90 Coding the RESTART Cardin i AR Ane a aia ae eas 90 Defining Crane Hook Loads cta cee Na nln telat ltteas 90 SEN A a RA A A EA ae 90 LINE Card tsi isin csi A A Se aes 91 Defining the Flooding Steps cosa anie eerie a e Sots era deta act gee A E A TETEN E 92 Using TUBE Cards vii aia 93 Using ETUB iC ards canica dd tito cate des tics to tad 93 Using OPEN CLOS OPND CEND Cardoen a a i 93 Coding Separate Flooding Sequences seeseseeeessesresesersstsserrisstssestessrsresttsestestesssstesrestsrissessee 94 Defining the
122. ct the nodes are defined on STRE and NSE cards The STRE cards define the majority of the tube elements that make up the jacket These are structural elements The program can generate loads for structural ele ments You can define other types of elements such as point masses and mud mats on the non structural element NSE cards The Material Properties MATE cards describe the material that the elements are made of The Geometric Properties GEOM cards describe the geometric data of the ele ments such as their diameter thickness or length Entering Node Coordinates NODE cards contain the X Y and Z coordinates of all the nodes for the structure The coordinates are in the FRA axis system for the structure The structure does not have to be entered in any particular position The program will position it before beginning any calculations Remember at this point you are really assigning node numbers to points in space You will connect the points with different shaped elements by referring to the node numbers on STRE and NSE cards A NODE card has five input fields You can define only one node per card For each node you enter its number and its X Y and Z coordinates INODE 1 0 19484 0 9873 0 53467 The card above would place node number 1 at X 19484 Y 9873 and Z 53467 Obviously the nodes for this jacket are being defined in a FRA coordinate space that goes from 0 to 1 in all three directions Installjac SESAM 78 10
123. cular plate of negligible thickness which generates hydrodynamic forces only TRIA Lamina triangular plate of zero thickness VTUB Valve flooded tube element Geometry ID Number I5 Enter a unique number for each group of GEOM cards Note TUBE SPHE DISC and TRIA elements use an additional GEOM card if their added mass or viscous drag coefficients are not equal to their defaults VTUB elements use an additional GEOM card to input the gas pump pressure or volume flow rate if a pump is begin used on the vent valve You will use the group number on these additional GEOM cards to tell the system which group the additional GEOM card belongs to The addi tional GEOM cards must follow the original GEOM card Diameter Length or I F10 0 Enter the outside diameter if the Element Type columns 17 20 is TUBE VTUB SPHE or DISC Enter the length of right angled triangular prism ele ments columns 17 20 PRIS Enter the mass moment of inertia Ixx about the x axis if the Element Type columns 17 20 is PMAS For rect L m y2 z2 12 for sphere LL 2me75 1 SL feet or meters for TUBE SPHE DISC and PRIS slug feet or kilogram m for PMAS Thickness or Ls F10 0 Enter the wall thickness if the Element Type columns 17 20 is TUBE VTUB or SPHE Enter the coupling mass moment of inertia Ixy if the Element Type columns 17 20 is PMAS Leave this field blank for PRIS and DISC elements feet or meters for TUBE SP
124. d NODE Node Coordinate Cards Required STRE Structural Element Cards Required NSE Non structural Element Cards Required MATE Material Properties Cards Required GEOM Geometric Properties Cards Required FLPR Fluid Property Card Required Table 7 1 FLOAT Data Run Cards 7 5 1 Setting Job Options Set the job options by entering data on the JOB and OPTIONS cards In the example below the JOB card tells the program that you are preparing a FLOAT run By leaving the rest of the columns blank the program defaults to the new data format and Metric units The OPTIONS card has these entries DATA Checks the structure data and saves it on the RESTART 1 file NODL Generates the least amount of printed output SESAM Installjac Program version 8 1 10 June 2010 77 7 5 2 7 5 2 1 You can also add titles and comments using TITLE and cards as in the following example JOB FLOAT TITLE Example Float Structure Building a FLOAT Structure AFEM file is usually converted to Installjac input We can however create our own jacket using these Installjac cards NODE Node Coordinate Cards STRE Structural Element Cards NSE Non structural Element Cards MATE Material Properties Cards GEOM Geometric Properties Cards A jacket is composed of a series of elements connected at nodes The nodes are points in a Cartesian coordinate system You enter coordinates using a series of node coordi nate cards The elements that conne
125. d of the conversion process an echo of the Installjac direct input file including SESAM Installjac Program version 8 1 10 June 2010 37 3 7 user defined input data is appended to the final input file that is generated The direct input file is read with the OINP name option of the FEM file conversion cards When reading this input file node names and element names appearing in this file is con verted to numbers and the translated cards are written to the final input file as described in previous section 3 6 4 XYZFEM and XYXELE cards included in the direct input file are included as comment cards in the final input file as described in sections 3 6 2 and 3 6 3 Launching and upending of the jacket is executed by restart runs In a restart run the lookup res file is read This file contains all relevant data of node and element name definitions from the positioning run Node and element names may also be entered in a restart input file Such names are translated to numbers in the same way as in the positioning run A final input file is formed and read by the core part of Installjac in the restart execution The final input file is named automatically by the program as restartl inp for a restart 1 run and restart2 inp for a restart 2 run If these names are applied for the direct input file a final file with a prefix underscore is formed i e _restartl inp Examples Input file restart 1 run launch inp May contain node and element nam
126. d set of control flooded members using the second set of linear elastic lines EQON 1 2 2 CTRL TUBE 101 501 CTRL ETUB 106 506 CTRL OPEN 23 24 vy vy 25 CTRL CLOS 99 CTRL FIN CTRL TUBE 101 501 CTRL ETUB 106 506 CTRL OPEN 23 24 vy vy 25 CTRL CLOS 99 LINE 1 100 1000 LINE 1 120 1000 LINE 1 140 1000 FIN LINE 1 100 1000 LINE 1 120 1000 LINE 1 140 1000 Hook coordinates in nex O GB O O O 5 5 5 5 DEDNE gl O OO O OO Oo SS 19 10 three Cs O O O OO 20 200 20 100 GOO O O O O fields Installjac 142 10 June 2010 Program version 8 1 10 29 Fluid Property Card FLPR This card is required Use this card to define the Water depth Water density Flow speed along the X axis FRA Flow speed along the Y axis FRA SESAM The defaults are Water Depth 1000 Water Density English 64 0286 Metric 1025 64 Flow speed x 0 y 0 Columns Entry Description and Variable Name 7 10 11 20 21 30 31 40 41 50 FLPR Enter the word FLPR Water Depth Enter the depth of the water The default is 1000 feet or meters See the JOB card Water Density Enter the density of the water The default is 64 0286 for English and 1025 64 for Me
127. defined or user node number applied No message is printed when the word CTRL is applied Installjac SESAM 128 10 June 2010 Program version 8 1 10 19 Next Step Card CTRL This card is optional and valid only for FLOAT Use it in conjunction with the EQON card The program will perform a complete jacket upending sequence consisting of consecutive steps of quasi static equilibrium Each step consists of a set of control flooded members applied to the jacket simultaneously Each set of control flooded members is entered into a directory and separated by FINI cards There is no default Columns Entry Description and Variable Name Format 7 10 CTRL A4 12 15 FINI A4 Example The example below shows how to use the Control Flooded Members Cards with the NEXT STEP card to create a directory The directory can be used by the EQON card CTRL TUBE 101 501 5 1 20 CTRL ETUB 106 506 5 1 200 CTRL OPEN p 23 24 25 CTRL CLOS 99 CTRL FIN CTRL TUBE 101 501 5 1 20 CTRL ETUB 106 506 5 1 100 CTRL OPEN 23 24 25 CTRL CLOS 99 SESAM Installjac Program version 8 1 10 June 2010 129 10 20 Current Speed Card CURR Use this card to set the speed of the current along the three axes The default is zero for all three values or as specified on the FLPR card Columns Entry Description and Variable Name Format 7 10 CURR A4 Enter the word CURR 11 20 Flow Spe
128. degrees to 1t It calculates the drag force from the distributed velocities in each of the component directions The default is 1 dimensionless 31 40 Velocity Alignment Angle F10 0 Enter the velocity alignment angle The analysis chooses the dominant velocity profile if the velocity alignment angle 6 is larger than the angle between the plane of translational velocity and rotational velocity It then resolves the other profile into the com ponents aligned with it and at 90 degrees to 1t It calcu lates the drag force from the distributed velocities in each of the component directions The default is 5 7 degrees Installjac SESAM 140 10 June 2010 Program version 8 1 10 28 Next Step Card FINI This card is optional except when creating multiple EQON analyses in FLOAT then it 1s required During an EQON analysis you can concatenate a number of independent analyses to create a complete jacket upending sequence This card lets you evaluate crane hook loads or control flooding sequences for each step in the control flooding process It is used in conjunction with the EQON card and CTRL cards It lets you evaluate either e A number of different crane hook loads for a single control flooding sequence or e A number of different control flooding sequences for a single crane hook load Columns Entry Description and Variable Name Format 7 10 FINI A4 Enter the word FINI Multiple Control Flooding Analysis Example This exa
129. des The appropriate node names of an element must exist have been defined to identify the element The element names are related to element numbers by comparing node numbers of the ele ment node names with element node numbers of the FEM file model Element names are presently implemented for beam tube elements only Use of the name concepts in the execution of Installjac is described in section 3 6 Use of Name Concepts in Intalljac Installjac SESAM 10 1 9 2 10 June 2010 Program version 8 1 Eccentricities In the finite element model idealization element ends at a joint are connected to the node at the centre line of the chord element Endcut data in Installjac are used for the purpose of modelling the physical connection of braces and chords at the tube surfaces of the chord elements correctly Lengths and placements of elements at the joint con nections are adjusted by the endcut values in order to compute masses forces moments and buoyancies as accurately as possible Endcut values are established by Preframe on basis of model geometry and classifica tion of the joints The endcut length is calculated as the distance from the joint node at the centre line of the chord to the tube surface of the chord along the directions of the braces see Fig 1 2 When stub and cone elements are modelled with shorter lengths than this distance the element lengths become negative when accounting for the endcut values A manual manipul
130. dimension exceeds 1 4 the minimum wave length The ideal ratio is 1 10 SESAM Installjac Program version 8 1 10 June 2010 223 10 78 Element Name Cards XYZELE These cards are required when the element name concept is used Use XYZELE cards to enter the node names of FEM file beam elements that are referred to by element names in the input files of Installjac The element name concept is required when Installjac input cards refer to FEM file beam elements and do not contain nodes to identify the elements The CTRL OPEN CLOS card is the only card of this category When this card is not applied the XYZELE card may be omitted Columns Entry Description and Variable Name Format 5 10 XYZELE A6 Enter the word XYZELE 11 30 Element Name Al6 Enter the element name for the node names on this card 31 50 Node name of element node 1 Al6 Enter the node name of the node 51 70 Node name of element node 2 Al6 Enter the node name of the node The node names are defined by XYZFEM cards and must exist to identify the element When the element name concept is applied all FEM file element numbers referred to in the Installjac input files should be replaced with element names An element name def inition must exist before it is can be referred to in the input file Note that the element name concept does not apply to elements defined directly in the Installjac input files by the user Such elements must be referred to by their user defined el
131. distance speci fied in columns 11 20 This is used to calculate the drag and added mass forces feet English or meters Met ric Drag Coefficient Format A4 F10 0 F10 0 F10 0 F10 0 F10 0 F10 0 SESAM Installjac Program version 8 1 10 June 2010 199 Enter the drag coefficient for the shape of the cross sec tion The default is 1 0 dimensionless 71 80 Added Mass Coefficient F10 0 Enter the added mass coefficient for the shape of the cross section The default is 1 0 dimensionless Installjac SESAM 200 10 June 2010 Program version 8 1 10 62 Rocker Dimension Cards RDxx These cards are optional They are used only for a side launch Use these cards to define the proportion of the normal reaction load to apply to individual rocker arms during a side launch These values define the elastic behavior of the jacket barge com bination Columns Entry Description and Variable Name Format 7 10 RDxx A4 Enter the word RDxx xx Rocker arm identifier below Selected Rocker Arms Enter AE RDAE to define loads for any of the rocker arms from A to E that are defined with the MRP cards Enter FJ RDFJ to define loads for any of the rocker arms from F to J that are defined with the MRP cards 11 20 Normal Reaction Loads for Rockers A or F F10 0 Enter the normal reaction loads for rockers A or F Used only if that rocker is defined with an MRP card dimen sionless 21 30 Normal Reac
132. ds These cards contain three data RPNx H L a where x denotes the identifier of the rocker arm x 1 2 or 3 H is the height distance of the rocker pin to the top side of the rocker L is the horizontal length of the rocker arm measured in the length direction of the barge and a is the angle of freedom which defines the maximum angle degrees the rocker arm is allowed to open The parame ters are shown in Fig 4 2 The height H determines the water line of the barge at the start of the analysis as the water line initially is set at the level of the rocker pin see Fig 4 2 The width W of the rocker arm as shown in Fig 4 2 is not entered by the user The pro gram applies the width of the last prism element defining the geometry of the barge as the width of the rocker arm when the rocker arm is displayed in launch animations The geometry of the rocker arm is such that 1t has equal lengths to both side of the rocker pin The rocker pin is a distance H below the top surface of the rocker arm The top surface is at same level as the top of the barge track The rocker is drawn with a vertical end cut to adapt the height of the barge track and a sharp edge where the jacket slides into the water The rocker arm follows the motion of the barge and may in addition rotate about the rocker pin when the jacket slides over the rocker arm into the water Fig 4 3 shows the rocker pin axis RPA system of the barge The origin is at the mid po
133. dy to launch All of the velocities and accelerations for both structures are very small or nearly equal to zero You want about 70 to 80 percent of the barge in the water You want a pitch angle trim on the barge of between 2 and 2 5 degrees The stern should be lower than the bow The barge should have no roll and no yaw Installjac SESAM 54 10 June 2010 Program version 8 1 4 7 2 1 Checking for Equilibrium The jacket and barge combination has reached equilibrium when all of the velocities and accelerations for both structures are very small See the following example Increase the number of timesteps on the TIME card and submit the job again if the velocities and accelerations are not zero by the last timestep The positioning run per formed at time 0 0s as indicated in Figure 4 3 below is purely a static iterative analy sis to determine the starting equilibrium position for the launching analysis DEGREE OF FREEDOM TIME RECORD STRUC POSITION FORCES SECS NUMBER NUMBER AND MOMENTS AT x T z RX RY RZ CENTRE OF GRAVITY SURGE SWAY HEAVE ROLL PITCH YAW 0 00 30 1 POSITION coG 20 9153 0 0583 44 6194 179 4651 84 0998 179 4791 VELOCITY C0G ACCELERATION COG POSITION RELATIVE 25 4400 0 0000 0 0000 0 0000 0 0000 0 0000 VELOCITY RELATIVE ACCELERATION RELATIVE E E x E A HYDROSTATIC 0 0000E 00 0 DOOOE 00 6 7573E 04 2 9347E 04 3 9829E 06 0 OOODE 00 MORISON DRAG 0 0000E 00 0 0000EF 00 0 0000E 00 0 0000E 00 0
134. e Several can be used to simulate ballast Point Buoyancies PBOY Use these when other elements cannot model the hydrostatic displacement properties Triangular Pressure Plates TPPL These plates have zero thickness They are usually used in conjunction with quadrilateral pressure plates to model the pressure and hydrostatics of the barge Quadrilateral Pressure Plates QPPL These plates have zero thickness They are usually used in conjunction with tri angular pressure plates to model the pressure and hydrostatics of the barge Entering Jacket Elements You enter jacket elements on two types of cards Structural Element STRE cards let you enter load bearing elements The Non structural Element NSE cards lets you enter data for things like boat landings and external ballast tanks Structural Element cards STRE define TUBE elements and are for structure 1 only For each load bearing tube in structure 1 enter element node material and geometry numbers The nodes that you enter must refer to node numbers that you entered on NODE cards The material numbers refer to MATE cards and the geometry numbers refer to GEOM cards 64 STRE TUBE Tn Liy oy Zip l The card above would generate a load bearing tube element number 64 between nodes 1 and 11 It would have the material properties as defined on the MATE card for material group 2 and the geometric properties as defined on the GEOM card for geom
135. e in the Z direction during an analysis of more than one structure after separation Leave this field blank when analyzing more than one structure before separation feet second SESAM Program version 8 1 10 June 2010 41 50 51 60 61 70 or meters second See the JOB card X Rotation Acceleration Enter the rotation acceleration of the structure in the X direction during an analysis of more than one structure after separation Leave this field blank when analyzing more than one structure before separation feet second or meters second See the JOB card Y Rotation Acceleration Enter the rotation acceleration of the structure about the Y axis feet second or meters second See the JOB card Z Rotation Acceleration Enter the rotation acceleration of the structure about the Z axis during an analysis of more than one structure after separation Leave this field blank when analyzing more than one structure before separation feet second or meters second See the JOB card Installjac 103 F10 0 F10 0 F10 0 Installjac SESAM 104 10 June 2010 Program version 8 1 10 4 Acceleration of Gravity Card ACCG Use this card to set the acceleration of gravity The default values are 32 185 English and 9 81 Metric The acceleration of gravity is relative to the Fixed reference Axis FRA system Columns Entry Description and Variable Name Format 7 10 ACCG A4 Enter the word ACCG 11
136. e launch of the jacket off a barge Then you can use your results as input to Sestra to study member loads and to see if you can launch the jacket without over testing it After launching you can use Installjac to perform complete upending sequence analyses Installjac results are processed using Xtract Figure 1 1 shows the program modules that are in the SESAM package Features With Installjac you can e model the launch of a jacket from a single or multiple hinged barges e simulate the free floating characteristics of a jacket e simulate upending a jacket using cranes hooks and or member flooding e generate the member launch loads for a jacket stress analysis and e model hydrodynamic and hydrostatic forces on a barge or multiple hinged barges Installjac consists of two built in programs for simulating the Launching and Upending processes LAUNCH and FLOAT Time history results from Installjac can be plotted using Xtract Xtract can also be used to animate the Launching and Upending Installjac SESAM 2 1 3 10 June 2010 Program version 8 1 PREPROCESSING ENVIRONMENTAL ANALYSIS POSTPROCESSING 2 N E lt zZ lt q lt ai ES O x E N ASSOCIATED INTEGRATED PROGRAM PACKAGES Figure 1 1 Overview of program modules in the SESAM package Limitations The model you create with Installjac is just that only a model The results you get from using Installjac will simulate the actual co
137. e linear equation system is only valid for small variations in depth roll and pitch It is thus mandatory to keep the motions small and set upper limits on change in motion for each step to maintain large SESAM Installjac Program version 8 1 10 June 2010 97 9 6 9 7 9 7 1 9 7 2 rotations are not uniquely defined with respect to order of execution about the x y and Z axes Restrictions are imposed to the size of increment motions Default values may be used or entered by the user MMVE command When a motion component is larger than the limit value the limit value applies In this way the motion is controlled during the iterations At each step the force residuals difference in acting and reacting forces will gradually decrease until the final equilibrium is obtained When problems are detected during the analysis it is normally caused by singularity in the equation system or by insufficient stiffness to handle the acting forces Physically this means that struc ture is unstable and may undergo large even for a small pertubation Running the Program Type in the following on the command line or through SESAM Manager installjac exe input lt inputfile gt inp During the processing the program reads the structure block data from the Restart 1 file It then moves the jacket to the starting position and repeats the equilibrium calcu lations until all the iterations have completed Finally the program generates the report
138. e loads and update the Jacket T FEM file e Presel Assemble jacket with barge and rocker arm in the correct position Connect barge super element to all jacket nodes that are still resting on the launch tracks Also assemble the loads on the T FEM file preferably with a com mon numbering system for all runs Please note that you do not have to rotate the jacket to the actual position as the direction of the loads will be relative to the jacket e Sestra Calculate beam forces for the T FEM load Check that reaction forces agree with the Barge rocker pin reactions at the end of the Installjac log file e Xtract check structural response for current position Then for all analysis steps together e Prepost merge all result files to one results database e GeniE or Framework run code check for all actual launch steps SESAM Installjac Program version 8 1 10 June 2010 71 6 6 1 Analyzing a Jacket After Separation Why This task lets us restrict our analysis to structure 1 We generally do this to 6 2 Analyze the behavior of the jacket from the time it separates from the barge until it reaches a stable position in the water and is ready to be upended Check the dive depth and trajectory of the structure Create a RESTART 2 file that can be used by FLOAT Reduce the amount of output generated by the program Reduce the time and cost of running the program When Run this task after the jacket separates from the
139. e model e g supported on springs to simulate water pressure or a simplified model of beams and springs that represent the stiffness of the barge Similarly the rocker arm can be modelled as a simplified beam structure with a support at the centre of the rocker pin For each load step you then assemble the jacket with the barge and rocker arm in the correct position In the Installjac log file from the LDOP run you will find a section ROCKER ARM TRACK NODES at the end of the file This section gives the coordinates of the current position of the rocker arm in the Jacket local coordinate system This means you can use these coordinates directly to connect the rocker arm to the jacket model When you assemble the jacket with the barge and rocker arm note that the loads on the T FEM file have the correct direction relative to the jacket for each position This means that you do not have to position the jacket with current rotations etc for each position in the structural analysis You can leave the jacket in its local coordinate sys tem You must however make sure that the rocker arm and the launch tracks are assem bled in the appropriate position for each step in the load calculation This is easily done with the Presel command INCLUDE SuperElNo POSITION see Fig 5 5 eT PI a de ee pie a Ee gt AA F 1 mn A E 1 1 1 1 os a a Fa y A 1 iy 2 w Dp EN riginal position ginal p The superelem
140. ecause on a normal run the program cal culates the acceleration so will ignore the values input by the user ACC cards can be used for testing purposes and for calculating the forces on the barge e g forces on the sea fastenings during transportation for a KNOWN acceleration of the barge and jacket The accelerations are relative to the Fixed reference Axis FRA system Columns Entry Description and Variable Name Format 7 10 Card Type Identifier A4 11 20 21 30 31 40 Enter the word ACCx x Structure Identifier below Structure Identifier Enter the number 1 2 or 3 for x ACC1 ACC2 or ACC3 to identify the structure that you want to set the starting acceleration for Note On an articulated barge if a conflict of boundary conditions exists the acceleration of the lead barge will be altered to maintain the zero boundary condition rela tive acceleration at the hinge X Translation Acceleration F10 0 Enter the translation acceleration of the structure in the X direction feet second or meters second See the JOB card Y Translation Acceleration F10 0 Enter the translation acceleration of the structure in the Y direction during an analysis of more than one structure after separation Leave this field blank when analyzing more than one structure before separation feet second or meters second See the JOB card Z Translation Acceleration F10 0 Enter the translation acceleration of the structur
141. ection Note Make sure that all of the elements connect The barge will behave like a balloon with a hole in it if you leave any holes in the description The following two NSE cards and the accompanying diagram show how to enter QPPL and TPPL cards NSE2 OPPL 877 23 21 15 20 NSE2 TPPL 545 24 16 22 Figure 3 11 TPPL QPPL Hydrostatic Barge Description 3 5 4 2 Hydrodynamic Barge Description The hydrodynamic barge description has two cards HBW Width card and HBN Barge Sides card The HBW card tells the program how wide the barge is The HBN defines the profile of the barge when looking at it from the side You define the profile by entering the nodes that identify the hull joints for one side of the barge The program will calculate the node coordinates for the other side Restrictions for how the barge can be shaped are described in the Reference chapter Refer to the HBN card descrip tion HBW2 100 0 HBN2 5000 5001 5004 5009 5010 The above cards would create a barge like the one below Again the order in which you enter the nodes determines whether the barge projects into or out of the page The barge would project into the page if 1 The positive X direction of the barge is toward the stern and 2 You enter nodes for the port side of the barge in counter clockwise order Installjac SESAM 30 10 June 2010 Program version 8 1 The barge would project out of the page if 1 The po
142. ed along X Axis F10 0 Enter the speed of the current along the X Axis FRA The default is 0 0 feet second or meters second 21 30 Flow Speed along Y Axis F10 0 Enter the speed of the current along the Y Axis FRA The default is 0 0 feet second or meters second 31 40 Flow Speed along Z Axis F10 0 Enter the speed of the current along the Z Axis FRA The default is 0 0 feet second or meters second Installjac SESAM 130 10 June 2010 Program version 8 1 10 21 Constant Winch Cable Card CWIN XYZCWIN Use this card to attach a crane hook using a cable with a constant tension assume to be applied by a winch The program calculates the vector between the hook and cable attachment point on the jacket If the distance that this vector represents magnitude is less than the length of the cable specified in columns 41 50 then no force is applied This length represents the amount of cable remaining when the winch drum is full This can be specified as zero 1 e the winch drum can winch in all the cable if required The program generates a force which is specified below in the direction of the vector as described above Note These cards cannot be used as part of a sling assembly Columns Entry Description and Variable Name Format 7 10 4 10 CWIN XYZCWIN A4 A7 15 16 20 23 26 30 31 40 Enter the word CWIN or CWIN Structure Identifier Il Enter the number 1 2 or 3 of the structure that you want t
143. ed at atmospheric pressure This calculates the volume as though the internal free surface of the member were coincident to the mean water level MWL when the air pressure is equal to atmo spheric pressure A number greater than or equal to 100 represents an unvented com partment at an air pressure greater than or equal to the atmospheric pressure when the flood valve is at the MWL CTRL ETUBp Lo 3p 4r 145 Using OPEN CLOS OPND CLND Cards These cards are used with the CTRL options for opening and closing ballast valves Installjac SESAM 94 10 June 2010 Program version 8 1 9 5 4 4 Coding Separate Flooding Sequences You can check the equilibrium of the structure at different points in the flooding sequence You do this by separating sequences with a FINI card In the following example we have told the program to process the flooding sequences in the order shown It floods the member between nodes 1 and 2 with 10 percent sea water and then calculates and reports the equilibrium position Next it floods the member to 15 percent and repeats the equilibrium calculations The amount of flooding of a member is not cumulative between steps If one wants the member to flood to fifteen percent of its volume then 15 not 5 must be entered on the second step The position between steps however is cumulative For example the first step might move the COG to 12 23 and rotate the pitch to 87 64 degrees The second step starts at this position
144. eeeceeseaeeeensseeeens 134 Viscous Drag Multiplication Factor Card DRGX coooocnnoccnocononcnonnnonncnonccnnncnnn ccoo nono ncnnnos 135 Free Floating Equilibrium Card EQON coooccccooccccononononcnonnocononcnconnnncnnncnonnncncnnncccnnneninns 136 Drag Force Calculation Limits Card ERRD oocccnnccnnononocononcconnnonancnnncnnn crac nro ccnoncnnnos 138 Next Step Card FINI viii a arcada a aas 140 Fluid Property Card FEBRES A ea A 142 Applied Forces Cards FORC XY ZPORC c cin iii 143 Free Hinge Card FREE siri Beat E n AE A TR RA 145 Briction Card ERICO a r a E an 146 Geometric Properties Cards GEOM sssssssssssssessessesesseeesseesseesseesseresseesseesseesseesseee 147 GEOM Continuation Card GEOM oooococcnnncnncnnononononononnonanononononocnononnnnnnnnnncncononannananonos 151 Barge Sides Cards HBINx XY ZUBIN a ia 153 Barse Width Cards HBW a Bes as ee ae 155 Hard Points Sea Bed Springs Card HPNT 0 cece eeeececeeceeceeeeecsteeeeseeeeseeeenaeeeenaeeees 156 Buoyancy Multiplication Factor Cards HY DX oocconnccnnoconocononcnonnnonncnonccnnnconn non nono ncnnnos 158 Jacket Track Cards JLTx XYZJLTX wo aeaaee E Ea a easaig 159 A NE 160 Linear Elastic Cable Card LINE XY ALINE luvinoiciniand aia 161 Locked Hinge AA E O 163 Material Properties Cards MATE as cccisscssesccssasdeaes island sa csadeaeosdcacansbea ss cedezare tants 164 Maximum Residual Error Card MERR occccnnnonoconannnonccnnnnnanonononcnnonannn
145. ement numbers The XYZELE cards may be given in the inputs files of Installjac or and specified in a separate file that is read during the positioning run D XYZELE cards given in a separate file To read the input file containing the XYZELE cards the file name must be entered with the MINP option on the FEM file conversion card see example below To read the conversion cards the option CONVERT must be included on the JOB card On basis of the node names element names are translated to element numbers and used further in the execution of Installjac The element name number relation is saved on file lookup res to be applied in restart executions when required Installjac 224 10 June 2010 Program v Example FEM file conversion cards JOB LAUNCH CONVERT TITLE JACKET LAUNCH INPUT Final input file AINP all inp Jacket FEM file JINP T11 FE RAM Barge F BINP T100 FE Endcut file Gl file a dummy file for now EINP endcut inp KKK Element name file of FEM file nodes INP xyzele inp File with other options not generated from Fl OINP Installjac_Command inp Node name file with XYZFEM cards xyzele inp KkKKK KkKK A KKK SESAM ersion 8 1 EM file lement names to be translated to element numbers AER Element name Node name 1 Node name 2 XKXXk XYZELE Ele_1 Joint_30016
146. enie jacket model Note that the jacket is in an upright position 1 e the height is measured along the z axis This is a program requirement that must be satisfied for the proper placing of the jacket on the barge to take place SESAM Program version 8 1 Installjac 10 June 2010 231 The input file for the positioning run is shown below JOB LAUNCH CONVERT TITLE EX 1 POSITIONING OF JACKET ON BARGE Generated input file see Section 10 1 for description of AINP JINP etc AINP EX1_POSN_1 INP e Jacket FEM file JINP EX1T1 FEM Barge FEM file a dummy file for now can be empty BINP EX1T100 FEM Endcut file generated from Preframe EINP EX1_ENDCUT INP e File with other options not generated from file above OINP EX1_OTHER INP Fig 11 2 Positioning input file EX1_POSN INP The file EX1_ENDCUT INP is a text file containing 3 columns that respectively repre sent all the jacket tube element numbers and the endcuts both ends The file EX1_POSN_1 INP is a merger of all the data in the four other input files and is the actual file that Installjac extracts data from to perform an analysis The contents of the file EX1_OTHER INP are shown Fgure 11 3 below 1 If the name of the endcut file is not specified then the program generates one end cut inp Installjac SESAM 232 10 June 2010 Program version 8 1 TITLE DYNAMIC EQUILIBRIUM POSITIONING OF JACKET ON BARGE OPTIONS EQON TRCE PBIS PRED VTFF END
147. ensure a stable movement of the structure where the residuals are gradually reduced until final equilib rium is attained Positions forces residuals and stability are printed for every iteration on the log file About Version 7 1 00 and Later Versions Versions 7 0 00 and above of Installjac are significantly different from previous ver sions because you are no longer allowed to use deck numbers and deck headers with your card input The requirements for deck numbers and headers has been replaced by giving each card type a unique keyword A new and much simpler comma separated format is also introduced for use in the input file The program automatically detects which of the two input formats is used from the first line in the input file i e that specified on the JOB card The two formats SESAM Program version 8 1 10 June 2010 CANNOT BE USED in one input file Installjac 5 With previous versions one only had to type the following fixed format input to define the jacket nodes digits 1 9 below are only used for text positioning 1 2 1234567890123456789012345678901234 1NODE dl 9873 4 53467 5 15678901234567890 With the new comma separated input format the above nodal definition would be NODE 1 98737 53467 Because of the unique keyword scheme the input in version 7 0 no longer has to be entered in a specific order and similar data does not have to be grouped into
148. ent assembly After positioning Figure 5 5 Illustration of Presel command INCLUDE SuperElNo POSITION Extract from an Install log file for a LDOP run REACTIONAL AND RESIDUAL FORCES LOAD CASE NUMBER 1 SESAM Installjac Program version 8 1 10 June 2010 69 X COORDINATE Y COORDINATE Z COORDINATE POSITION OF STRUCTURE 0 1949 0 1400 70 5026 POSITION OF ROCKER REACTION 46 6265 0 0000 14 7223 ROCKER NUMBER OPERATIVE 0 ROCKER ARM TRACK NODES AFT PORT 40 9464 13 5000 26 9283 FORWARD PORT 42 3217 13 5000 1 9662 AFT STARBOARD 40 9464 13 5000 26 9283 FORWARD STARBOARD 42 3217 13 5000 1 9662 X FORCE Y FORCE Z FORCE JACKET TRACK FORCE LSA 1 382482E 08 8 154697E 05 1 317579E 07 MAGNITUDE OF EXT FORCE LSA 1 382482E 08 8 154697E 05 1 317579E 07 RESIDUAL FORCE 1 342240E 00 9 118281E 03 2 575864E 02 X MOMENT Y MOMENT Z MOMENT JACKET TRACK FORCE LSA 4 049380E 07 7 729289E 09 5 504911E 07 MAGNITUDE OF EXT FORCE LSA 4 048712E 07 7 729289E 09 5 505138E 07 RESIDUAL FORCE 6 680580E 03 2 404582E 01 2 270191E 03 In this section of the Installjac log file you also find the resulting forces on the launch runners and rocker pin for each load step You can compare these to the reaction forces you get from Sestra Please note that the reference coordinate system for the forces in the Installjac log file may vary from the reactions in Sestra You may have to calculate the vector sum of the force components
149. epth of the Stern Barges have a maximum depth that you can submerge the stern We can use the Degree of Freedom report to calculate the stern depth Look again at the rocker pin heave posi tion above We know from the RPN card Refer to the Input Echo report how far below the deck the rocker pin is In the example the deck starts out at 5m above the rocker pin which is at the water line Adding the original deck position to the heave position of the rocker pin puts the deck at the stern at 8003m above the water surface 5m 4 1997m 8003m TIME RECORD STRUC POSITION FORCES SECS NUMBER NUMBER AND MOMENTS AT x T z RX RY RZ CENTRE OF GRAVITY SURGE SWAY HEAVE ROLL PITCH YAW 30 00 61 2 POSITION coG 129 0589 0 0312 2 0025 0 1293 6 0088 0 0060 VELOCITY coG 3 8340 0 0020 0 1909 0 0133 0 2675 0 0031 ACCELERATION COG 0 2732 0 0005 0 0435 0 0063 0 0709 0 0011 POSITION ROCKER PIN 36 7008 0 0330 4 1997 0 1293 6 0088 0 0060 VELOCITY ROCKER PIN 3 8630 0 0084 0 2403 0 0133 0 2675 0 0031 ACCELERATION ROCKER PIN 0 2829 0 0030 0 0707 0 0063 0 0709 0 0011 HYDROSTATIC 0 0000EF 00 0 0000E 00 4 1609E 08 1 8811E 07 1 9974E 10 DO OD00E 00 MORISON DRAG 0 0000EF 00 0 0000E 00 0 0000E 00 0 0000E 00 0 0000E 00 0 0000E 00 GYROSCOPIC 0 0000EF 00 0 0000E 00 0 0000E 00 5 7068E 03 8 0236E 02 4 5226E 04 ADDED MASS MOMENTUM 0 DOOOE 00 0 0000E 00 0 0000E 00 0 0000E 00 0 0000E 00 0 0000E 00 GRAVITY 0 0000EF 00 0 Q000E 00 2 9038E 08 0 0000E 00 0 0000E
150. er node on the same plane as node 338 is nearer to the seabed Note The Clearance from the Sea Bed field is also measured from the lowest point on the barge TIME RECORD STRUC POSITION FORCES SECS NUMBER NUMBER AND MOMENTS AT x Mi z RX RY RZ CENTRE OF GRAVITY SURGE SWAY HEAVE ROLL PITCH YAW 30 50 62 1 POSITION coG 40 5991 0 0955 31 1031 179 1589 80 6943 179 1638 VELOCITY coG 4 7780 0 0058 6162 0 0161 0 3018 0 0035 ACCELERATION COG 0 1112 0 0020 0 2558 0 0050 0 0664 0 0007 POSITION RELATIVE 0 0000 0 0000 0 0000 0 0000 0 0000 0 0000 VELOCITY RELATIVE 0 0000 0 0000 0 0000 0 0000 0 0000 0 0000 ACCELERATION RELATIVE 0 0000 0 0000 0 0000 0 0000 0 0000 0 0000 HYDROSTATIC 1 9063E 10 9 0339E 11 3 4561E 07 5 4031E 06 6 5858E 08 Z 7103E 09 MORISON DRAG 1 0190E 07 7 0290E 04 5 0154E 06 2 3000E 06 2 5023E 08 1 5054E 05 GYROSCOPIC 1 2876E 02 5 6752E 01 2 8950E 03 8 4694E 03 4 7660E 04 2 Z030E 04 ADDED MASS MOMENTUM 0 0000EF 00 0 0000EF 00 0 0000E 00 0 0000E 00 0 0000E 00 0 0000E 00 GRAVITY 0 0000EF 00 0 0000E 00 1 662ZE 08 0 0000E 00 0 0000E 00 0 0000EF 00 TRACK WINCH FORCES 0 0000E 00 6 151ZE 07 6 0054E 07 0 0000E 00 0 0000EF 00 0 0000E 00 ERROR PER TIMESTEP 1 5270E 05 7 9Z253E 07 1 2295E 04 1 8240E 05 6 0157E 05 3 8436E 06 TOTAL FORCE 1 0190E 07 7 0233E 04 1 266SE 08 7 6946E 06 4 0830E 08 1 2852E 05 CLEARANCE FROM SEA BED 95 7351 POSITION NODE 338 97 1259 35 9448 17 9785 Figure 5 3 Jacket output data just after separat
151. ercentage Volume Change Flood Rate F10 0 Enter the final flood time i e the time that the element percentage flooded finished changing if you specified TIME in columns 57 60 Enter the flood rate 1f you specified RATE in columns 57 60 If you specified TIME then the percentage flooded lin early increases from the initial percentage flooded to the final percentage flooded and is equal to this value at the final flood time In the case where the final flood time exceeds the simu lation time a single message starting this would be out put and the analysis would continue The default is 0 0 seconds Final flood TIME feet second English or m second Metric Flow RATE Apply node names for nodes that are read from the FEM file model when the node name concept is applied A node name is defined by the XYZFEM card and must exist before it is applied If a node name is not found an echo of the name is printed The present card may contain a mix of user defined node numbers and node names of the FEM file model When the card name has the prefix XYZ 1 e XYZCTRL a message is printed to the Installjac MLG file if the node name is not found node name not defined or user node number applied No message is printed when the word CTRL is applied Installjac SESAM 116 10 June 2010 Program version 8 1 10 12 Valve Flooded Members CTRL VTUB XYZCTRL VTUB These cards are optional and valid for LAUNCH only The Valve
152. ers as indicated below The same applies for the elements Cards with a mix of user defined node numbers and node names JLTA 5740 Joint_3051 JLTB 5753 Joint_3531 Translated cards JLTA 5740 3051 JLTB 5753 3531 When translating an input card with node and element references all references are assumed to be names If a reference is not found among the defined names an echo of the input data is printed For the above cards 5740 and 5753 are not found among the defined node names and an echo of the numbers are printed to the translated cards All Installjac cards comprising node or element names may be given a XYZ prefix Informations about node and element names that are not found are printed to the Installjac mlg file if the cards are supplied with the XYZ prefix The XYZ prefix is removed when printing the translated cards Cards with a mix of user defined node numbers and node names XYZJLTA 5740 Joint_3051 XYZJLTB 5753 Joint_3531 Translated cards Installjac SESAM 36 3 6 5 10 June 2010 Program version 8 1 JLTA 5740 3051 JLTB 5753 3531 For the above cards the following messages are printed to the Installjac mlg file One or more names do not match names on the XYZFEM cards InCard XYZJLTA 5740 Joint_2951 OutCard JLTA 5740 Joint_2951 One or more names do not match names on the XYZFEM cards InCard XYZJLTB 5753 Joint_3531 OutCard JuTB
153. es and possible XYZFEM and XYZELEL cards Final restart input file restart inp Contains possible node and element numbers converted from node and element names of the launch inp Possible XYZFEM and XYZELE cards included as comment cards Final restart input file used as direct input file restartl inp New final restart input file _restartl inp Running the Program Through Brix Explorer See Brix Explorer User Manual On a Dos window command line Type in the following on the command line installjac exe input lt inputfile gt inp Through Sesam Manager Upon activating the Utility Run command window below the input and output file Installjac SESAM 38 10 June 2010 Program version 8 1 names can be specified Run a program Program Executable Min Extra command line arguments foutput all testl log Aun mode Background x Output file Edit output file M MANAGER defaults Edit input file Startup Plot Figure 3 14 Running intalljac in SESAM Manager During the processing the program reads and checks the structure data If there are no errors it calculates the mass center of mass and mass moments of inertia for each structure It also creates the Fixed Reference Axis FRA and the local axis system LSA Finally it generates the reports and creates the RESTART 1 file which contains the structure data and calculations 3 8 Checking the Reports Running the program with the DATA option prod
154. esent such things as boat landings on jackets For barges these cards are used to define the hydrostatic properties for the barge In general you will use PRIS PMAS TPPL and QPPL elements to model the hydro static forces of barges Other element types however can be used Table 3 identifies the valid element types and their entries on the NSE cards Installjac has two ways to enter hydrostatic properties of barges For the barge model ling TPPL and QPPL must be used for the barge hydrostatics The tracks must be defined in order for the barge to be included in a FLOAT analysis For LAUNCH PRIS or QPPL TPPL are used for hydrostatic barge modelling depend ing on whether or not waves are present The hydrostatics calculated in still waters are identical for both types of elements In waves the hydrostatic forces for PRIS elements are calculated assuming ZERO PRESSURE ATTENUATION over the surface of the PRIS element although the position of the local water surface is included i e the wavelength is assumed infinitely long so both element types should give the same answer for very long waves within modelling accuracy the smaller the elements the more accurate the modelling QPPL and TPPL elements integrate the water pressure over the surface of the element to Ist order wave theory i e pressure over the wetted surface is given by p rho gee zoo e kz cos wt kx phi where rho density of water gee acceleration due t
155. etry group 1 Enter non structural elements for the jacket structure number 1 on NSE cards NSE cards can generate other elements besides tubes For example you might use it to put a mud plate on the bottom of the jacket or to add ballast tanks NSE1 TUBE 2 201 321 3 4 NSE1 TUBE 3 301 221 3 4 NSEl TRIA 4 101 111 102 6 The first two NSE cards above would create a X brace across one side of a bay The last card would put a Lamina triangular plate of zero thickness between three of the Installjac SESAM 26 10 June 2010 Program version 8 1 legs at the bottom of the bay as shown in Figure 3 9 Z a Figure 3 9 Non Structural Jacket Elements 3 5 4 Describing a Barge Barges require two types of descriptions The first is the hydrostatic description and the second is the hydrodynamic description 3 5 4 1 Hydrostatic Barge Description The hydrostatic barge description defines how a barge sits in the water its trim and its displacement For simple geometric shapes the hydrostatics of a barge are usually described using right angled triangular prism elements and point mass elements The prism elements have no mass or material They are tools for describing the volume of a barge The point mass elements determine the center of gravity of the barge Note Prisms are invalid in a FLOAT job Use TPPL and QPPL elements to define a barge for FLOAT for performin
156. explained in Section 3 6 After the analysis the jacket is placed on the barge as shown in Figure 11 3 below Figure 11 4 Jacket placed on barge after positioning 11 1 2 Launching The input file for the launching run is shown below JOB LAUNCH TITLE DYNAMIC LAUNCHING OF JACKET ON BARGE OPTIONS TRCE PRED PPEL VTFF END RESTART 1 Installjac SESAM 234 10 June 2010 Program version 8 1 BARGE AND JACKET TRACK NODES BLT1 505 506 BLT2 507 508 JLT1 236 23 JLT2 251 38 ROCKER ARM 2 IN NUMBER COORDINATES AND PROPERTIES RPNI 5 000 25 000 20 000 RPN2 1 500 10 000 70 000 RELF 1 E29 1 E29 WNCH FRIC 0 04 0 04 STARTING POSITIONS OF BARGE AND JACKET POS1 25 440 POS2 0 0 0 0 0 1587 0 0 2 7464 0 0 x TIME INT PARAMETERS EE NO OF INC TIME INC INITIAL RECORD NO START TIME TIME 500 0 500 0 000 DEFAULT VISCOUS DRAG amp ADDED MASS MULT FACTOR DRG1 1 0 DRG2 1 0 AMS1 1 0 AMS72 1 0 PRINT EVERY TIME STEP AND NODE 452 RESULTS PREV 1 NOD1 452 Figure 11 5 Input file for the launching EX1_LNCH INP Comments on the input fie EX1_LNCH INP e The model geometry data card numbers 1 6 i Table 1 1 were gen erated in the previous positioning analysis and stored in the restart file installjac res e Card numbers 7 and above Table 1 1 are not stored in the restart file and must be given again in the launching input e The POSN option
157. g Print Optom ii ia 61 Other Option it ni IR tadas 61 Running the Program ii A aes 61 Checkin the Report ctimiitaliain diia iii salinidad 62 Things to Check il haa a EE aA ee Gin a Aenean 62 Time History Report iii A A ies 62 Checking the Trim of the Bariyer ieie iee iria debio diodes E 62 Checking the Depth of the Sterm erstere neironi entere EEE EREE EE AAEE ees 63 Checking the Rocker Pin Reaction ce eeesceeessceeseecssecsseeseceseeeseecsaeceeceeceaeecsecaecnseeeneseneesaeens 63 Checking the Depth of the Diyes sinine neinei la Sa ei 64 Checking Velocities aie vesuresc coe steve Lise cies aetna cede estas Nate tee data e ele tade das e a E a a tios 65 Launch Tia A cal an aah eae ee edie 65 Forces A Ctin evita ais 65 Results Summary aii il a 65 Visualizing the Structures and Animations oooonoccnocnnoconaccnononononnnonanano nono ncnnconnncnnnrnnnrnn cnn naco na cines 65 5 8 6 6 1 6 2 6 3 6 4 6 4 1 6 4 2 6 4 3 6 4 4 6 4 5 6 5 6 6 6 6 1 6 6 2 6 6 2 1 6 6 2 2 6 7 7 7 1 7 2 7 3 7 4 7 5 7 5 1 7 5 2 7 5 2 1 1 322 7 5 3 7 5 4 7 5 5 7 5 6 7 5 6 1 7 5 6 2 7 6 7 7 7 7 1 8 8 1 8 2 8 3 8 4 8 5 8 5 1 8 5 2 8 5 3 8 5 4 8 5 4 1 8 5 4 2 Table of Contents Load Calcnlation ri A Gerstein es nel ABA ete 67 Analyzing a Jacket After Separation oommoocms 71 O de neta A 71 A ORO 71 Task Outline ista idad 71 Entering Cards cs Acne A Sa Sin ean ee ane 71 Sett
158. g Installjac Cards 2 Positions the rocker arm pivot at the required height on the barge and mid way across the rocker arm s 3 Sets the origin of the Rocker Pin Axis system RPA at the mid point of the rocker pin 4 Moves the barge and jacket combination such that e The origin of the rocker pin axes is at the origin of the fixed reference axis when POS cards are at 0 0 0 and e The launch tracks of the barge are parallel to the still water surface X Y plane of FRA 5 Calculates their equilibrium positions for each time step 6 Creates the RESTART file updated X Z Rocker pin axis RPA Xr Zr Rotated Rocker pin axis Figure 4 1 Aligning the Jacket and Barge The RESTART file contains the structure and position data that will be read when you launch the jacket After the run you should e Check the results using the reports generated by the program Installjac SESAM 42 10 June 2010 Program version 8 1 4 5 Entering Positioning Run Cards The following table lists the cards that the program uses during a LAUNCH Position ing Run The table is followed by instructions for completing the cards Card Description Status JOB Job Card Required TITLE Title Cards Optional ETEF Comment Cards Optional OPTIONS Options Cards Required RESTART Restart Card Conditional BLT Barge Launch Track Cards Required JLT Jacket Launch Track Cards Required RPN R
159. g on those elements as shown in Figure 11 11a Installjac 240 10 June 2010 11 2 Example 2 SESAM Program version 8 1 The jacket and barge are modelled manually using Installjac options as shown as in the truncated input for the positioning analysis shown in Figure 11 9 below 11 2 1 Positioning The input is in fixed format and English imperial units of measure is used JOB LAUNCH ENGLISH ECHO PaO TITLE POSITIONING RUN DIRECT GEOMETRY INPUT OPTIONS EQON VTFF PRFO END 1NODE 141 43 00 48 00 196 9 INODE 142 43 00 42 00 196 9 Lo Conta STRE TUBE 101 201 1 1 STRE TUBE 201 301 1 1 STRE TUBE 301 401 1 2 STRE TUBE 401 501 1 2 saai Cent J MATE 1 16 18 MATE 5112 243478 0 MATE 6012 474534 0 GEO UBE 1 4 500 0 8167E 010 0000E 000 GEO 10 6000 1 000 GEO UBE 2 4 500 0 5250E 010 0000E 000 GEO 20 6000 1 000 se Ent ds GEOM PRIS 5000 80 0 GEOM PMAS 5112 1 426E08 2 613E09 GEOM PMAS 6012 2 778E08 GEOM TUBE 999 5 500 0 8167E 010 0000E 000 NSE2 PRIS 5002 5000 5003 5000 NSE2 PRIS 5001 5003 5000 5000 NSE2 PRIS 5003 5001 5004 5000 as entad HBW2 80 0 HBN2 5000 5001 5004 5009 5010 FLPR 500 1 99 0 0 ACCG 32 20 BLTA 5051 5052 BLTB 5053 5054 JLTA 6051 6052 JLTB 6053 6054 RPNA 7 50 40 0 25 0 WNCH 500000 015 0 0 FRIC 1000 0 1000 0 0 0 RELF 0 0 0 0 0 0 TIME 30 0 5
160. g upending analysis on barge like structures You define the barge hydrostatics using NSE cards The sample cards show how to code a simple barge like the one below using five prisms and a point mass It uses a total of eight nodes SESAM Installjac Program version 8 1 10 June 2010 27 Figure 3 10 Simple Hydrostatic Barge Description The order in which you enter the nodes to define a prism makes a difference The first node on the card is the origin of a right angle The second and third nodes entered depends on the side of the barge being defined port or starboard You would enter nodes counterclockwise when 1 The nodes are for the port side of the barge and 2 The positive X direction of the FRA is toward the stern of the barge The starboard side of the barge would project into the plane of the page in Figure 3 11 Enter nodes in a clockwise direction when 1 The nodes are for the starboard side of the barge and 2 The positive X direction of the FRA is toward the stern of the barge The port side of the barge would project out of the plane of the page in Figure 3 11 Note You must code the NSE cards and the Barge Sides HBN cards such that both descriptions project the barge in the same direction In the following example the first NSE card defines a prism between nodes 22 21 and 23 This is represented by triangle 1 in the two dimensional diagram below The sec ond prism creates the triangular section fr
161. gram version 8 1 10 June 2010 161 10 41 Linear Elastic Cable Card LINE XYZLINE This card is optional Use it to attach the structure to a crane hook using a linear elastic cable The program calculates the distance between the hook and the cable attachment point on the jacket It applies no force the cable is slack when the calculated distance 1s less than the unstretched length The program generates a force proportional to the difference between the calculated distance and the unstretched length when the dis tance is greater than the unstretched length The stiffness that you enter on this card is the constant of proportionality For example FORCE Stiffness x Distance Unstretched Length 1 FORCE 0 00 when Distance lt Unstretched Length Note These cards can be used in conjunction with the SLN card to create a multi line sling assembly Columns Entry Description and Variable Name Format 7 10 4 10 LINE XYZLINE A4 A7 Enter the word LINE or XYZLINE 15 Structure Identifier Il Enter the number 1 2 or 3 of the structure that you want to set the starting positions for 16 20 Structure Attachment Node Number Node Name I5 A16 Enter the node number node name where the line is attached to the structure Leave this field blank if this is the FIRST card of a sling assembly type 2 SLN2 1 e it represents the line between the sheave and the hook 25 Structure Identifier Il Enter the number 1 2 or 3 of the
162. he Installjac Input Descripti0N oooonocnnccniccnnoncnanconaconannos 34 Execution IMOGES si A RT AA A EA Caste debs Was Cue tea aint 36 Running the Program miii hdd 37 Checking the Reports js te scsi fescssehasivcs tescees etilo a Ea a stseostetauetuss 38 3 8 1 3 9 4 1 4 2 4 3 4 4 4 5 4 5 1 4 5 2 4 5 3 4 5 4 4 5 4 1 4 5 4 2 4 5 5 4 5 5 1 4 5 5 2 4 5 4 3 4 5 6 4 6 4 7 4 7 1 4 7 2 4 7 2 1 4 7 2 2 4 8 5 1 a2 5 3 5 4 5 4 1 5 4 2 5 4 3 5 4 4 5 4 5 5 5 5 6 5 6 1 5 6 2 5 6 2 1 5 6 2 2 5 6 2 3 5 6 2 4 5 6 2 5 5 6 2 6 5 6 2 7 5 6 2 8 5 7 Table of Contents Mass and Displaced Volume when Fully Submerged Report 0 cece eeseesseeeeeeeeeseeeeceeenseeees 38 Visualizing the Structures and Animations cele eeseessecsseeseceeeeeseecseecaeceseceseeeaeeeaeesaeceaeesseenes 39 Positioning the Jacket and Barge Structures Before a Launch ccmomc 40 WY NS 40 WED O ONO eis 40 Getting Read ii eatin ee een ea 40 ERA E Ob tect iis NON 40 Entering Positions Run Cards sc 0 25 ye 5 sheies adobe dedetestadotes acota eei eeri aiae pae a ece a iaa lees 42 Setting Job OPUS ii Ae ba aa aie ian ees 42 Coding the RESTART Cardiel noticiario rear E E EEEE a e I Teate 43 Defining the Track P SItIONS iesise ipri ia add 43 Defining Winch and Friction Dalarnas a aa 44 Defining Winch Data ind 44 Defining Friction Data sc c cccssscecaeddees cuit coos uid cauas ae a eE aae N e EE e eE ee Ea sE ee n
163. he bow of the barge you might center a point mass element in the stern This would move the center of gravity toward the stern and the new coordinates might be Center of X Y Z Gravity 55 0 0 0 5 6 Buoyancy 45 0 0 0 5 0 Table 3 3 Example Coordinates for a Deck Tilting to the Stern You can also describe the hydrostatics for barges using triangular and quadrilateral plates You must use these elements if the barge will also be used in a FLOAT job You will also want to use these elements instead of prisms if you plan to include waves in a LAUNCH analysis See the NSE card description in the Reference Section As with prism elements the order that you enter the nodes for QPPL and TPPL ele ments is important Enter nodes in a counterclockwise direction when The nodes are for the port side of the barge and 2 The positive X direction of the FRA is toward the stern of the barge The starboard side of the barge would project into the plane of the page in Figure 3 11 Enter nodes in a clockwise direction when SESAM Installjac Program version 8 1 10 June 2010 29 1 The nodes are for the starboard side of the barge and 2 The positive X direction of the FRA is toward the stern of the barge The port side of the barge would project out of the plane of the page in Figure 3 11 Note You must code the NSE cards and the Barge Sides HBN cards such that both descriptions project the barge in the same dir
164. he number 1 2 or 3 for x PCG1 PCG2 or PCG3 to identify the structure that you want X Coordinate Enter the X coordinate for the center of gravity of the structure using the RPA axis Y Coordinate RPA Use this field to define the Y coordinate for the center of gravity of the structure using the RPA axis Z Coordinate RPA Use this field to define the Z coordinate for the center of gravity of the structure using the RPA axis X Rotation Use this field to define the X rotation angle of the struc ture degrees Y Rotation Use this field to define the Y rotation angle of the struc ture using the RPA axis degrees Z Rotation Use this field to define the Z rotation angle of the struc ture using the RPA axis degrees Format A4 F10 0 F10 0 F10 0 F10 0 F10 0 F10 0 Installjac SESAM 186 10 June 2010 Program version 8 1 10 55 Non Linear Elastic Cable Tension Card PLYN This card is conditional It must immediately precede ALL NLIN cards subject to that polynomial description You can use non linear elastic cables instead of the linear elas tic cable defined by the LINE card A non linear elastic cable cannot be described by a single constant of proportionality so the stiffness is omitted from the NLIN card It is replaced by up to five coefficients in a PLYN card The program calculates the cable tension using the following equation Tension P E P E P3 E Py Ef P E E
165. his option is required if an LDOP option is used Note If the LPLD give a projection of the NSE outside the ends of the STRE or if the projection on the STRE is less than the 1 30 of the original length then the program will print a warning message at the DATA stage of the analysis and revert to output of the loads as global joint loads 55 60 1st Node I5 A16 Enter the number name of the node number which cor responds to the first node on the structural tube STRE card to which the loads on this member are to be trans ferred 61 65 2nd Node I5 A16 Enter the number name of the node number which cor responds to the second node on the structural tube STRE card to which the loads on this member are to be trans ferred SESAM Installjac Program version 8 1 10 June 2010 179 The table below shows which fields apply to which elements e X means that the field is required NA means that the field is not applicable Element First Node Second Third Node Material Geometry Type 17 20 21 25 Node 26 30 31 35 Group No Group No 36 40 41 45 TUBE X X NA X X SPHE X NA NA X X PRIS X X X NA X PBOY X NA NA X NA PMAS X NA NA X X DISC X X NA NA X TRIA X X X NA X TPPL X X X NA NA QPPL X X X 4th node NA SYMX NA NA NA NA NA SYMY NA NA NA NA NA Table 10 2 Non Structural Element Card File Apply node names for nodes that are read from the FEM file m
166. hows the position buoyancy moments and stability of the jacket for each iteration Use this report to e Determine if the jacket has reached an equilibrium position e Determine whether the equilibrium position is stable e Check its trim Checking for Equilibrium The jacket has reached equilibrium when the excess buoyancy moments are zero or near zero and the positions of the center of the buoyancy are zero or near zero Note that this will not be the case when crane hooks are present Check also that the equilib rium position is a stable one i e three dashes on the stability column in all three free doms Equilibrium positions can be unstable as well as stable Checking the Trim of the Jacket You can use the position information Depth Roll X and Pitch Y to determine the trim of the jacket In the example we had to rotate the jacket about both the X and Y axes The first iteration on the previous report shows this starting position of the center of gravity using PSA coordinates The last iteration shows the ending position Check the depth It should be a positive number A negative number in the depth col umn would mean that the center of gravity is above the surface of the water Check the pitch angle We want the top of the jacket to be at or above the surface of the water In our example we initially rotated the jacket ninety degrees to lay it over in the water The top of the jacket needs to rise by at least as much as the b
167. ile containing XYZELE cards XYZELE Ele 244 Joint_179 Joint_187 XYZELE Ele_1752 Joint_30021 Joint_40021 XYZELE cards printed as comment cards in the restart inp and restart2 inp files con taining the translated input XYZELE Ele_244 Joint_179 Joint_187 XYZELE Ele_1752 Joint_30021 Joint_40021 Installjac SESAM 226 10 June 2010 Program version 8 1 10 79 Node Name Coordinate Cards XYZFEM These cards are required when the node name concept is used Use the XYZFEM card to define a name for the node at a given xyz coordinate Columns Entry Description and Variable Name Format 5 10 XYZFEM A6 Enter the word XYZFEM 11 30 Node Name Al6 Enter the node joint name for the coordinates on this card 31 40 X Coordinate of the Node F10 0 Enter the X coordinate of the node 41 50 Y Coordinate of the Node F10 0 Enter the Y coordinate of the node 51 60 Z Coordinate of the Node F10 0 Enter the Z coordinate of the node When the node name concept is applied FEM file node numbers referred to in the Installjac input files may be replaced with node names A node name definition must exist before it is can be referred to in the input file Note that the node name concept does not apply to nodes defined directly in the Install jac input files Such nodes must be referred to by their node numbers The XYZFEM cards may be given in the inputs files
168. in a counter clockwise order i e bow to stern on the port side and stern to bow on the starboard side Node numbers do not have to be in sequential or ascending order however it can be handy in avoiding input errors Valid de e deck 6 2 O x 3 4 Installjac 154 SESAM 10 June 2010 Program version 8 1 Invalid nodes 5 6 not at right angle to deck 1 deck 6 Book 5 3 4 Invalid nodes 2 amp 3 above deck 3 2 Rn ei ee es Gai 5 See A deck 110 1 6 Hon O 7 8 Invalid node 4 outside end of deck defined by node 6 1 deck KG J mo By 3 4 Valid 10 deck A 2 11 20 7 6 Apply node names for nodes that are read from the FEM file model when the node name concept is applied A node name is defined by the XYZFEM card and must exist before it is applied If a node name is not found an echo of the name is printed The present card may contain a mix of user defined node numbers and node names of the FEM file model When the card name has the prefix XYZ i e XYZHBNx a message is printed to the Installjac MLG file if the node name is not found node name not defined or user node number applied No message is printed when the word HBNx is applied SESAM Installjac Program version 8 1 10 June 2010 155 10 36 Barge Width Cards HB Wx These cards are required for all barge structures Use these c
169. in the same plane The two tracks on a given structure must be parallel This means that a line drawn between the first nodes on each track must be at right angles to both tracks The two tracks on a given structure must be the same length The tracks on the barge however do not have to be the same length as those on the jacket On the barge the first nodes of each track must be positioned vertically above and parallel to the main rocker pin The width between tracks on all structures must be constant and equal Please note the following 1 Columns 7 10 4 10 11 15 16 20 The program positions the jacket and barge such that the first node of each track is coincident for the two structures This means that the first node of track A on the jacket is coincident with the first node of track A on the barge etc When the jacket begins to move the second node on each of its tracks will be moving toward the first nodes on the barge tracks Entry Description and Variable Name Format BLTx XYZBLTx A4 A7 Enter the word BLTx or XYZBLTx x Structure Identifier below Track Identifier For x enter A for the first track or B for the second track BLTA BLTB 1st Node I5 A16 Enter the node number node name of the first node This node must be positioned above the rocker arm pin 2nd Node I5 A16 Enter the node number node name of the second node Installjac SESAM 110 10 June 2010 Program version
170. inates all separated with commas XYZFEM Joint_692 14 75 33 1149 96 9867 The coordinate values must be coordinates of a nodal point of the T FEM file model The node name is connected to the node number in the T FEM file model by compar ing coordinates If no mach is found the node name is regarded as erroneous and a mes SESAM Installjac Program version 8 1 10 June 2010 33 3 6 3 sage is printed to the Installjac mlg file If the same name appears more than once on the XYZFEM cards the second and later definitions are disregarded and information is printed to Installjac mlg file The num ber of XYXFEM cards can not exceed the number of nodes of the T FEM file model By using the automatic create joint feature in GeniE you may can easily make node names Create joints in all node positions and use the report function to print a list of joint names and coordinates This list may easily be rewritten to XYZFEM commands XYZFEM cards may be placed directly in the Installjac input files or collected in a sep arate file A combination is also possible When a separate file is applied the file is read when the JOB card contains the CON VERT option and a FEM file conversion card NINP followed by the file name is included JOB LAUNCH CONVERT ECCENT NINP xyzfem inp When reading the xyzfem inp file node names are converted to node numbers and the node name node number relations are saved for later use in
171. inear Damping NOPR NOPR 16 Diffraction NOPR NOPR 17 Froude Krylov NOPR PRNT 18 Gravity PRNT PRNT 19 Wave Inertia NA PRNT 20 Total Crane Hook PRNT PRNT 21 Total Ballast PRNT PRNT 22 Rocker Pin Reaction NOPR NOPR 23 Track Winch Forces PRNT PRNT 24 Error Per Timestep PRNT PRNT 25 Total Force PRNT PRNT 26 Clearance PRNT PRNT SESAM Installjac Program version 8 1 June 195 27 Wave Height at Origin NOPR PRNT 28 Hinge Reactions HLA NOPR PRNT 29 Hinge Reactions FRA NOPR PRNT 30 Lead Barge Forces NOPR PRNT 36 Valve Flooded Tube Parameters PRNT PRNT 37 Nodal Position PRNT PRNT 38 Nodal Velocity PRNT PRNT 39 Nodal Acceleration PRNT PRNT 40 Individual Mooring Tensions PRNT PRNT Table 10 3 Parameter reference numbers Additional Information The following example shows how to 1 Print the SLAM and Froude Krylov for a jacket 2 Print Rocker pin position velocity and acceleration for a barge 3 Stop printing the COG position velocity and acceleration for a jacket 4 Stop printing the track winch forces for a barge PRN1 12 17 PRN2 7 8 9 NOP Ty LD NOP2 23 Installjac SESAM 196 10 June 2010 Program version 8 1 10 59 Trajectory Starting Conditions Cards PRPx These cards are optional POS PRP and PCG cards are mutually exclusive Use PRP cards to define the starting position of the structures before separation Use the Degree of
172. ing JODO pons reido ir lid tallos 72 Coding the RESTART Card vnn anina nanas eaea ia does ooo EEE Dedo aztec e EP arase eS aea 72 Entering Time Integration Parameters 0 cceecccceeecssecesseceescecescecececeeeecsaeeeaaeceeaeceeaeeceeeeenaeens 72 Controlling Print Options juntarse een dadeusaeterdepobbosdareainenscsaotenss 73 Other Options iia Basten eva Gna eee a Lee eh ak Reels Lada ian Gees 73 Running the PLOT ists ecs te sae zecleosiey sans At ocean es 73 Checking the Reports umi 74 Things to Check eenn tia ts EER Tre E ARAS 74 Time History Report aiii ias 74 Checking the Depth of the DIVE oooooonocnnonncoconcconnconnnonnconaconnconnconannn non a iee Eea ea cnn eR ccoo 74 Checkins Velocity anene eeens a a a a slots tated Habs Ea i Eees 74 Plotting the Structure PositiONS cisco ciidiitletslenestbnloiaiptaiiel boiler ticas aaa 74 Checking a Jacket Before Upending ccssccsssssssscccsssccssscccssssccsssccssescsssecseseeees 75 Wi A AA A dialed 75 A A 75 Getting Rad Yi a a 75 ESA ON 75 Entering FLOAT Data Run Cards eecocnicnnianiitae inten cris ii ici 76 Setting Job Options nrn tarea desea rede ddeh Haas iedecdasdestapsuaceentesedsaetsdeoeesd 76 Building a FLOAT Structure rat heh ease A I A es 77 Entering Node Coordinates xi een en aein bo de ise date ae eons geen tae 77 Element O E cotdea dees 78 Entering Jacket Elements isis iiaitar sitiar pic 78 Material Propertiese sprint ali Acie 78 Geometric Pro
173. int of the rocker pin Initially the RPA system coincide with the global reference sys tem FRA The RPA system moves and rotates along with the movement and rotation of the rocker arm SESAM 10 June 2010 Program version 8 1 Rocker arm Rocker pin Sea surface pen rocker arm x Rocker pin Figure 4 2 Initial position length L height H and angle of freedom a of rocker arm Za Figure 4 3 Rocker Pin Axes RPA of barge SESAM Installjac Program version 8 1 10 June 2010 47 The rocker may consist of up to 3 rocker arms as shown in Fig 4 4 Input is given by 3 RPNx cards one for each rocker arm RPN1 H Ly Qy RPN2 H gt Ly 0 RPN3 H3 L3 03 The rocker arms are also referred to as the main rocker arm rocker arm 1 secondary rocker arm rocker arm 2 and supplementary rocker arm rocker arm 3 Figure 4 4 Barge with 3 rocker arms The opening procedure of the rocker arms is as follows Rocker arm 1 always start to open first The opening increases until the allowable opening angle a is reached then rocker arm 2 starts to open provided that further opening is required When the opening limit a is reached rocker arm 3 starts to open while rocker arms 1 and 2 stay at maxi Installjac SESAM 48 10 June 2010 Program version 8 1 mum opening angle Closing of the rocker arms takes place in reversed order 1 e first rocker arm 3 closes then rocker arm 2 and finally rocker arm 1 Duri
174. ion SESAM Installjac Program version 8 1 10 June 2010 65 5 6 2 5 Checking Velocities Use the COG velocity fields to check the velocities of the jacket and barge at the sepa ration A good rule of thumb to use is that the jacket should not have a velocity greater than 4 572 m s The barge velocity should be less than 7 62 m s 5 6 2 6 Launch Time Another good rule of thumb is that the jacket and barge should separate within 60 to 120 seconds The time is printed on the left side of the output report 5 6 2 7 Forces Acting Before winch forces are released i e before the jacket starts sliding the equilibrium forces are as shown in Figure 5 4 below NB Figure 5 4 is from another launch input DEGREE OF FREEDOM TIME RECORD STRUC POSITION FORCES SECS NUMBER NUMBER AND MOMENTS AT x Y Z RX RY RZ CENTRE OF GRAVITY SURGE SWAY HEAVE ROLL PITCH YAW 4 00 9 1 POSITION COG 20 7869 1 2823 43 8272 166 7927 83 7343 167 0617 VELOCITY COG 0 2833 0 0383 0 0569 0 1144 0 0231 0 0177 ACCELERATION COG 0 1146 0 0030 0 0441 0 0081 0 0284 0 0002 POSITION RELATIVE 26 4816 0 0000 0 0000 0 0000 0 0000 0 0000 VELOCITY RELATIVE 0 5000 0 0000 0 0000 0 0000 0 0000 0 0000 ACCELERATION RELATIVE 0 2069 0 0000 0 0000 0 0000 0 0000 0 0000 HYDROSTATIC 1 7735E 11 9 3774E 12 2 0538E 06 3 7085E 07 1 6395E 08 5 2387E 10 MORISON DRAG 1 4469E 02 6 0827E 01 1 0783E 02 2 5329E 03 1 2759E 04 3 7861E 03 GYROSC
175. ion Factor Conditional Cards AMS Added Mass Multiplication Factor Conditional Cards SLM Slam Multiplication Factor Cards Conditional SC1 Reynolds Number Scale Card Conditional Note Use these to control currents CDRN Current Direction Card Conditional CURR Current Speed Card Conditional CPRF Current Profile Cards Conditional Note Use these to control printing options NOD Node Printing Cards Conditional PRN Print Cards Conditional PREV Print Increment Card Conditional Note Use this card to control flooding CTRL Control Flooding Cards Conditional Note Use these to control crane hook loads FORC Applied Forces Cards Conditional CWIN Constant Winch Cable Card Conditional LINE Linear Elastic Cable Cards Conditional PLYN Non Linear Elastic Cable Tension Conditional Cards NLIN Non Linear Elastic Cable Cards Conditional FINI Next Step Cards Conditional Note Use these to control wave options WDEF Wave Definition Cards Conditional ADDM Added Mass Matrix Cards Conditional Installjac SESAM 60 10 June 2010 Program version 8 1 DAMP Linear Damping Matrix Cards Conditional DIFF Diffraction Force Cards Conditional DIFM Diffraction Moment Vector Cards Conditional 5 4 1 5 4 2 5 4 3 Table 5 1 LAUNCH Run Cards The RESTART card is conditional because you can do a Launch run without it If you leave it out however you must include all the cards that would normally go i
176. ions Set up the job by entering data on the JOB and OPTIONS cards In the following exam ple the JOB card tells the program that you are preparing a Float run Leave the rest of the columns blank to default to the new data format and Metric units Enter the following on the OPTIONS card NODL Generates the least amount of printed output SESAM Installjac Program version 8 1 10 June 2010 83 8 5 2 8 5 3 8 5 4 JOB LAUNCH TITLE EXAMPLE POSITIONING RUN OPTIONS NODL END Coding the RESTART Card The RESTART card tells the program which RESTART file to use A positioning run uses the RESTART 1 file The RESTART 1 file is created by the DATA option of the LAUNCH or FLOAT runs It contains the information about the structures and the global parameters Defining the Track Positions Installjac has two Jacket Track Position cards JLTA and JLTB The track cards use the same format Each contains e The name of the structure JLT jacket e The letter of the track A or B The number of the node at the top of the track e The number of the node at the bottom of the track JLTA 1111 1112 ETD 1121y TUDO 1 The two tracks on a structure must be parallel 2 The two tracks on a structure must be the same length Setting the Starting Position As discussed in the previous chapter FLOAT uses three axis systems e FRA Fixed Reference Axis system e LSA Local System of Axis e PSA
177. ix of user defined element numbers and ele ment names of the FEM file model When the card name has the prefix XYZ i e XYZCTRL a message is printed to the Installjac MLG file if the element name is not found element name not defined or user element number applied No message is printed when the word CTRL is applied SESAM Installjac Program version 8 1 10 June 2010 127 10 18 Free Flooding Card CTRL XYZCTRL This card is optional Use it to override the ballast valve setting for any step There is no default Columns Entry Description and Variable Name Format 7 10 4 10 CTRL XYZCTRL A4 A7 Enter the word CTRL or XYZCTRL 12 15 Ballast Valve Setting A4 Enter OPND To open the ballast valve CLND To close the ballast valve 16 20 Structure Identifier 15 default is Jacket i e 1 21 25 1st Node I5 A16 Enter the first node number node name of the element 26 30 2nd Node I5 A16 Enter the second node number node name of the ele ment Apply node names for nodes that are read from the FEM file model when the node name concept is applied A node name is defined by the XYZFEM card and must exist before it is applied If a node name is not found an echo of the name is printed The present card may contain a mix of user defined node numbers and node names of the FEM file model When the card name has the prefix XYZ i e XYZCTRL a message is printed to the Installjac MLG file if the node name is not found node name not
178. l be relative to the last computed time from the previous run The RESTART 2 run also uses the time increment from the previous run for the first new reported time For example if the previous run was in time increments of 0 1 seconds and the last reported time was 19 9 seconds using RESTART 2 with time increments of 5 seconds would SESAM Program version 8 1 Installjac 10 June 2010 produce times of 20 0 20 5 21 0 The program ignores all of the cards in Table 10 4 above as well as the cards in the Table 10 5 below when you use a RESTART 2 card Card Description ACCx Acceleration Cards AXIS Hinge Axis Card BLTx Barge Launch Track Cards ERRL Drag Force Calculation Limits Card FREE Free Hinge Card FRIC Friction Force Card JLTx Jacket Launch Track Cards LOCK Locked Hinge Card MERR Maximum Residual Error Card MMVE Maximum Movement per Iterations Card MRP Multiple Rocker Arm Property Cards MXNI Maximum Number of Iterations Card PCGx Position Cards POSx Position Cards PRPx Position Cards RDxx Rocker Dimension Cards RELF Restraint Cards RPNx Rocker Pin Cards VELx Velocity Cards WNCH Winch Card Table 10 5 Cards Ignored by RESTART 2 203 Installjac SESAM 204 10 June 2010 Program version 8 1 10 65 Rocker Arm Description Cards RPNx These cards are required for LAUNCH option positioning EQON launch run or FLOAT combination runs Use this ca
179. lable e What length would give an acceptable angle between the cables at the hook e When do the top cables become taunt Installjac SESAM 92 9 5 4 10 June 2010 Program version 8 1 Naturally because of the cost and time involved you want to use cables that the sup plier has available New cables can be very expensive The second thing to consider is the angle that the cables make at the hook when the crane is holding the jacket upright Short cables give you a larger angle but put more compressional force on the cross members between the attachment points than do long cables The advantage of short cables is that all four cables become taunt sooner which helps reduce jacket roll So your cable length determines the trade off between these two fac tors Calculate the length of the cable using this equation CL SW sin 5 0 where W Is the width of the member between the attachment points on the thin side of the structure See figure reference 0 Is the angle between the cables when the jacket is suspended from the hook in its fully upright position So 1f the width of the structure is 50 feet and the cable angle is 30 degrees CL 25 sin 15 96 6 feet During the lift the bottom two cables become taunt first The crane hook is located directly over their attachment points in the X axis and halfway between their points on the Y axis As the crane lifts the jacket rotates All four lines become taunt when the
180. ljac Program version 8 1 10 June 2010 7 7 2 RAPR Rocker Arm Properties RPN1 RPNA L F Winch and Friction Parame RPN2 RPNB ters Rocker Restraint Forces RPN3 PRNC RPO1 MRPA RPO2 MRPB RPO3 MRPC PRO4 MRPD RPOS5 MRPE RP06 MRPF RPO7 MRPG RPO8 MRPH RPO9 MRPI RP10 MRPJ RDO1 RDAE RDO2 RDFJ WNCH WNCH FRIC FRIC RELF RELF 7 3 HNGE Hinge Definition AXIS 8 ELMT Launch Error Limits ERRL ERRL L 8 ITLM Float Iteration Limits MMVE MMVE MERR MERR MXNI MXNI 9 TRST Trajectory Starting Condi POS1 POS1 L F tions POS2 POS2 POS3 VEL1 VEL1 VEL2 VEL2 VEL3 PCG1 PCG2 PRP1 PRP2 ACC 10 TINT Launch Time Integration TIME TIME L Parameters 10 ADEF Float Analysis Definitions EQON EQON F STRX STRX STRY STRY OBTZ OBTZ OBRX OBRX OBRY OBRY Installjac SESAM 8 10 June 2010 Program version 8 1 11 HYPC Hydrostatic and Hydrody HYD1 L F namic Factors Reynolds HYD2 Number Parameter Current DRG1 HYD3 Definition DRG2 DRG1 DRG2 AMS1 DRG3 AMS2 AMS1 AMS2 SLM1 AMS3 SLM2 SLM1 SC1 SLM2 CDRN SLM3 CURR SC1 CPRF CDRN CURR CPRF 12 PROP Printing Options NOD1 NOD1 LP NOD2 NOD2 NOD3 PRN1 PRN1 PRN2 PRN2 PRN3 NOP NOPI NOP2 NOP2 NOP3 PREV PREV 13 CTRL Control Flooding TUBE CTRL L F TUBE OPEN ETUB FINI CLOS OPND CLND 14 CRAN Mooring Lines Crane Hook FORC FORC L F Loads Sling and Hook SLNG SLN Descriptions LINE LINE PLYN PLYN NLIN NLIN FINI FINI CWIN
181. lly adequate for a large jacket You might have to reduce this number for small structures With this set to 0 5 and Number of increments calculated is 30 the barge and jacket will have 15 seconds to separate Starting Time SESAM Installjac Program version 8 1 10 June 2010 61 5 4 4 5 4 5 S 5 This value controls the start time of time incrementation The total time of an analysis is the Starting Time plus the Time Increment times the number of exe cuted increments TIME 30 1 0 0 0 Controlling Print Options You can include Node Printing NOD cards in a LAUNCH Run These cards will help you see when the barge and jacket separate Node cards tell the program to print the positions of nodes that you specify In the example below the program would print the positions of nodes 1 and 2 on the jacket and nodes 21 and 22 on the barge Nodes 1 and 2 are at the base of the jacket nodes 21 and 22 are at the stern of the barge You can use the position reports for these nodes to tell when the two structures separate and to track the depth of dive of the jacket Note The Time History Report prints a message when the structures separate The best way to check the depth of dive is to use the Clearance Value field on the report NOD1 1 2 NOD2 21 22 Other Options You can enter many other cards during a Launch Run For example you can enter cards that control Hydrodynamic Parameter Coefficients Control Flooded Members Crane
182. lobal Parameters The last set of cards that we need set such things as the water depth current profile and acceleration of gravity The Float option can use two global parameter cards FLPR Flow Parameters ACCG Gravity 7 5 6 1 Flow Parameters The FLPR Flow Parameters card controls the water depth density and flow speed at the surface Below is a card setting depth to 25 meters and density to 1000 kilograms per cubic meter in still water 6FLPR 114 0 1025 0 7 5 6 2 Gravity Card The ACCG card sets the acceleration equal to the that due to gravity and is required ACCG 9 81 7 6 Running the Program Type in the following on the command line or through SESAM Manager installjac exe input lt inputfile gt inp The program reads and checks the structure data If there are no errors it calculates the mass center of mass and mass moments of inertia for each structure It also creates the Fixed Reference Axis FRA and the local axis system LSA Finally it generates the reports and creates the RESTART 1 file which contains the structure s data Installjac SESAM 80 10 June 2010 Program version 8 1 Teh Checking the Reports Running the program with the DATA option produces the Mass and Displaced Volume When Fully Submerged report for each structure 7 7 1 Mass and Displaced Volume When Fully Submerged Report 1 Verify that the program used all of the elements for the structure by checking the Number of Elements column
183. locity F10 0 Enter the rotation velocity of the structure about the Y SESAM Installjac Program version 8 1 10 June 2010 219 axis The default is 0 0 feet second or meters second See the JOB card 61 70 Z Rotation Velocity F10 0 Enter the rotation velocity of the structure about the Z axis during an analysis of more than one structure after separation Leave this field blank when analyzing more than one structure before separation feet second or meters second See the JOB card Installjac SESAM 220 10 June 2010 Program version 8 1 10 75 Wave Definition Card WDEF This card is optional Use it to define an Airy wave The Airy wave formulation is for finite water depth All calculations are based on the water depth entered on the FLPR card Airy waves are defined by for parameters T H 6 and b such that at the origin of the Fixed Reference Axes FRA Water Surface Elevation H 2 cos 2n T t KX cos b KY sin b 0 1 where T period H wave height phase angle b heading angle t time k wave number Note Spectral sea can be defined by a series of AIM waves with random phases Spread sea can also be represented by specifying sets of waves in several directions Columns Entry Description and Variable Name Format 7 10 WDEF A4 Enter the word WDEF 11 15 Blank 16 20 Blank 21 30 Period T Seconds F10 0 Enter the period of the wave seconds 31 40 Height H Length F10 0 Ente
184. m Xp Yp Zp 18 always located in the element node with the lowest global Z coordinate value Node A During launching and upending the origin of the coordinate system may change from one node to the other SESAM Installjac Program version 8 1 10 June 2010 13 Beam with eccentricities Ze End2 Xe End to end axis Flexible part of beam Xn Node to node axis Node B ea eccentricity node A end 1 eg eccentricity node B end 2 Xn Yn Zn node to node coordinate system of beam NodeA Xe Ye Ze end to end coordinate system of beam Beam with endcuts Xn Xe ea endcut node A end 1 eg endcut node B end 2 Xn Yn Zn node to node coordinate system of beam Node A Xe Ye Ze end to end coordinate system of beam Figure 1 4 Beam with eccentricities and endcuts Installjac SESAM 14 2 2 1 2 1 1 10 June 2010 Program version 8 1 Getting Started with Installjac This chapter details e using this User s Guide and e accessing Installjac Using the User s Guide This section describes e how the User s Guide is structured and e conventions used in this User s Guide How the User s Guide is Structured The Installjac User s Guide contains the following additional chapters Coding and Checking the Jacket and Barge Structures This chapter describes how to verify that the jacket and or barge have been cor rectly coded It also describes some global parameters that
185. m position in the water You run this task to 1 Verify that the structures float and 2 Determine if the trim of the mated structures is the way you want it for the launch 4 2 When Run this task after verifying that the structures are correctly coded with a Data Run see Coding and Checking the Structures You must run this positioning task before you launch the jacket from the barge 4 3 Getting Ready Before you begin this task 1 Verify that you entered nodes during the Data Run for the launch tracks 2 Verify that you entered nodes during the Data Run for the barge hinge if you are working with an articulated barge Note If your Data Run did not include nodes for these two items modify and re execute the Data Run 3 Getthe Launch Barge Characteristics and determine the amount of winch force that the barge can generate 4 4 Task Outline This outline assumes that you are using structure data from the RESTART 1 file created by a Data Run During this task you will Enter card data that defines the launch tracks rocker arms winch forces friction forces and number of iterations When you execute the program it 1 Positions the jacket on the barge SESAM Installjac Program version 8 1 10 June 2010 41 The program positions the structures such that their launch tracks are coin cident Note This is true only when the POS cards default or are set to 0 0 0 Refer to POS card in Chapter 10 Describin
186. material and buoyancy prop erties of the structures You can use the RESTART 1 card to define the structure in subsequent runs if this check produces no error messages EQON The program iterates in the time domain to a position of hydrostatic equilibrium As each position freedom reaches zero acceleration the freedom velocity is set to zero The time increments are specified on the TIME card The launch analysis can then be initiated by removing the EQON option and setting the RESTART card to 2 This option produces no hydro dynamic calculations STR1 The program removes structure 2 the barge and continues to compute the tra jectory of structure 1 the jacket The resulting RESTART file is appropriate for the analysis of structure 1 only Note In practice you use the DATA and SESAM Installjac Program version 8 1 10 June 2010 183 EQON options in separate runs You usu ally use the STR1 option after a jacket has separated from a barge EQON and STR are invalid for FLOAT when more that one structure has been input RNDD The program selects a Reynolds Number dependent drag coefficient for all TUBE elements NVDR Use approximate solution for drag on tubes FLTE Program card image for float CONF On a Restart 2 for Launch continue flood ing as a restart CGAS Use Centre Of Gravity axis system for barge jacket integration YAWR Release yaw freedom on the rocker MROC Use multiple rocker arms YLCH Side launch option
187. mple shows how to code EQON control flooding and crane hook load cards to evaluate a single crane hook load for a number of control flooding sce narios In the example the program will 1 Process the first set of control flooded members using the second set of lin ear elastic lines LINE cards 2 Next it will process the second set of control flooded members using the second set of linear elastic lines EQON 2 1 2 CTRL CTRL TUBE IOl S0lyy Op Uy 20 CTRL ETUB 106 506 5 200 CTRL OPEN 23 24 25 CTRL CLOS 99 CTRL FIN CTRL TUBE 101 501 5 1 20 CTRL ETUB 106 506 5 1 100 CTRL OPEN 23 24 25 CTRL CLOS 99 LINE ae LOO x 1 00 00 0 BOND LINE Ly 2204574 AO OOO O DO O Onas LINE hy LAO yy LOOO Os O 5 00 06 FIN SESAM Program version 8 1 10 June 2010 LINE 1 100 10000 0 LINE 1 120 10000 0 LINE 1 140 10000 0 Installjac 141 BO Obi Seve 50 000 Va 50 005 ss Hook coordinates in next three fields Multiple Crane Hook Analysis Example This example show how to code EQON control flooding and crane hook load cards to evaluate a number of crane hook positions during the control flooding procedure In the example the program will 1 Process the second set of control flooded members using the first set of lin ear elastic lines 2 Next it will process the secon
188. n Data and Positioning Runs Setting Job Options Set the job options by entering data on the JOB and OPTIONS cards In the following example the JOB card tells the program that you are preparing a LAUNCH Run Leave the rest of the columns blank to default to the new data format and Metric units Enter the following on the OPTIONS card NODL Generates the least amount of printed output JOB LAUNCH TITLE EXAMPLE LAUNCH RUN OPTIONS NODL END Coding the RESTART Card The RESTART card tells the program which RESTART file installjac res to use A Launch Run uses and updates RESTART 1 The RESTART 2 file is created by the EQON option of the LAUNCH or FLOAT It contains information about the structures their positions and the global parameters Entering Time Integration Parameters The Time Integration Parameters card controls how long the program will run when trying to launch the jacket The card has these inputs Last Increment This value controls the record number of the last time step the program will cal culate in the analysis Typically you will set this to between 30 and 100 Start of Incrementation This value controls the record number from which time incrementation starts The record number of step n is the Start of Incrementation value plus n If omit ted the start level is 0 Time Increment This value controls the time that elapses between position calculations A sec ond 0 5 sec is usua
189. n a line from each corner of the jacket to a crane hook It takes five cards to do this in Float a SLN card and four LINE cards See the examples on alternative ways of defining a sling assembly shown in Section 10 69 9 5 3 1 SLN Card The SLN card has two input fields Load and Height You can enter information in only one of these two fields For most applications we leave the Load field blank and set the crane hook height This gives us the most accurate simulation of actual events In the real world the crane operator does not control the load on the crane directly It is deter mined by the height of the hook and the weight of the structure To determine the minimum height that you will have to raise the hook add the cable length leg length leg diameter and a little extra for cable stretch Then subtract the water depth cable length leg length leg diameter fudge factor water depth You can define up to 25 different sling arrangements with four cables each In the SESAM Installjac Program version 8 1 10 June 2010 91 9 5 3 2 example below the first SLN card and the following four LINE cards define the basic sling arrangement The first FINI card marks the end of the first crane hook set and the beginning of the second The second SEN card raises the hook fifty feet The third one raises it to the point where both sides of the sling become taunt And the last one raises it to the final height of the hook
190. nch position Remember e The velocities and accelerations of both structures must be zero e Seventy to eighty percent of the barge should be in the water e The barge should have a pitch between 2 and 2 5 degrees with the stern lower than the bow e The barge should have no roll or yaw Repeat the Data and Positioning runs until your structures satisfy these conditions Task Outline During this task you will e Enter the job option data using JOB OPTIONS and RESTART cards You will also set some time step and print options When you execute the program it 1 Starts at the equilibrium position calculated in the Positioning run 2 Connects and activates the winch or jack The winch will begin pushing the jacket down the launch tracks causing rel ative movement between the two structures The movement of the jacket is defined by the displacement of the jacket RPA from the barge RPA The movement of the barge is defined by the displacement of the barge RPA from the origin of the FRA At this point the jacket has been launched and is separated from the barge You can continue to analyze the actions of both structures but usually you will want to study only the jacket behavior Installjac SESAM 58 10 June 2010 Program version 8 1 1 Updates the RESTART installjac res file 2 Generates the graphics file VTF if this is requested with the VTFF option 3 Generates the reports After the run you should e Check
191. nd an echo of the name is printed The present card may contain a mix of user defined node numbers and node names of the FEM file model When the card name has the prefix XYZ i e XYZNLIN a message is printed to the Installjac MLG file if the node name is not found node name not defined or user node number applied No message is printed when the word NLIN is applied SESAM Installjac Program version 8 1 10 June 2010 173 10 49 Node Printing Card NODx XYZNODx This card is optional Use this card to print the coordinates of selected notes at each time step This can help you visualize the motion of different parts of the structure Note DO NOT USE THIS CARD WITH THE LDOP OPTION Columns Entry Description and Variable Name Format 7 10 4 10 NODx XYZNODx A4 A7 11 70 Enter the word NODx or XYZNODx x Structure Number below Structure Number Enter the number 1 2 or 3 for x NOD1 NOD2 or NOD3 defining the structure the following nodes are defined in Node Numbers Node Names 1415 14A16 Enter up to 14 nodes per card The node numbers must be right justified in the data entry fields You may enter as many NOD cards as needed however the maximum number of nodes that may be entered is 70 Apply node names for nodes that are read from the FEM file model when the node name concept is applied A node name is defined by the XYZFEM card and must exist before it is applied If a node name is not found an echo of the
192. nditional CWIN Constant Winch Force Cards Conditional LINE Linear Elastic Cable Cards Conditional PLYN Non Linear Elastic Cable Tension Cards Conditional NLIN Non Linear Elastic Cable Cards Conditional FINI Next Step Cards Conditional Table 9 1 Upending Run Cards Installjac SESAM 90 10 June 2010 Program version 8 1 The RESTART card is conditional because you can do an Upending Run without it If you leave it out however you must include all the cards that would normally go in a Data Run Although these cards are required they may be omitted in which case the defaults are used 9 5 1 Setting Job Options Set up the job by entering data on the JOB and OPTIONS cards In the following exam ple the JOB card tells the program that you are preparing a Float Run Leave the rest of the columns blank to default to the new data format and Metric units Enter the following on the OPTIONS card NODL Generates the least amount of printed output JOB FLOAT TITLE EXAMPLE UPENDING RUN OPTIONS NODL END 9 5 2 Coding the RESTART Card The RESTART card tells the program which Restart file to use An Upending Run uses and updates Restart 1 The Restart 1 file is created by the DATA option of the LAUNCH or FLOAT options It contains the information about the structure and the global parameters 9 5 3 Defining Crane Hook Loads In most cases we use a sling assembly to lift the jacket Basically we ru
193. nditions but there is a margin of error There are limits on the size of the model you can create with Installjac You can at present define up to 40000 Nodes 60000 Elements 20000 Materials and 20000 Sec tion properties Node numbers 50000 to 50900 are reserved for nodes generated for visualizing the barge in the postprocessor Xtract And therefore the structure or barge definitions should not use these node numbers Jacket loads can only be generated at specific times during the launching process Only one load step is generated during an analysis SESAM Installjac Program version 8 1 10 June 2010 3 1 4 1 5 16 1 7 Inputs Each module LAUNCH and FLOAT of Installjac requires slightly different input LAUNCH requires the physical descriptions of both the barge and jacket structures and their material and section properties Also global parameters such as water depth and density and the acceleration due to gravity must be set The launch parameters must also be defined FLOAT requires similar input to LAUNCH but in FLOAT you only analyze the jacket Also crane hook information and or member flooding sequences are required FLOAT calculates only hydrostatic equilibrium and does not account for wave elevation Outputs LAUNCH and FLOAT each generate different output LAUNCH produces printed reports that describe various positions and properties of both structures during the launch and a RESTART file Graphical VTF and
194. ng opening and closing of the rocker arms the RPA reference system of the barge moves to the rocker pin of the active rocker arm From onset of the analysis the refer ence system is located at rocker pin and stay at this location until the opening limit a 1s reached and rocker arm 2 starts to open see Fig 4 5A The reference system then switches to rocker pin 2 see Fig 4 5B and when rocker arm 3 starts to open it switches to rocker pin 3 see Fig 4 5C When closing takes place the reference system switches to the rocker pins in reversed order of the opening 4 5 5 2 Mass and Cross Section properties of the rocker arm The mass and cross section properties of the rocker is entered by the RAMS and RAXS The cards are optional When they are omitted the rocker arm is considered weightless and no mass and stiffness properties are assigned to the rocker The jacket will then separate from the barge as soon as the trailing part of the jacket track passes the rocker pin and the rocker arm will stay in open position after separation When the RAMS and RAXS are given closing of the rocker arm is governed by the dynamic motion due to inertia forces acting on the rocker mass Mass and section properties are entered for the port and starboard side of the main rocker arm rocker arm 1 see Fig 4 6 Hence two RAMS card are required The first card is for the port side mass and the second is for the starboard side mass RAMS Mport RAMS Mstarboard Mport
195. nononononnoncnnnnns 165 Maximum Movement Increment per Iteration Card MMVE cooconnccccoccnoccnannnonncnonennnos 167 Multiple Rocker Arm Property Cards MRPX coooconoccnnoccconononccnoncnan ccoo nono nccnncnona ccoo ncnnns 169 Maximum Number of Iterations Card MXNI o ooconccoconnnonocnnonanononononoccononanancnnnncnccnonnnos 170 Non Linear Elastic Cable and Non Linear Sea Bed Sprint Cards NLIN XYZNLIN 171 Node Printing Card NODx XYZNODX ccceeecceceseeceseeeceseeeceeeecseeeeceteeeeneeeeneeeees 173 Coordinate Cards NODE csi ita 174 Non Structural Element Cards NSEx XYZNSEX c0ocooccccccncnononnnnnnnnonconcnnnnn no nonononinnnnos 175 Out of Balance Report Card OBRx OBRy OBTZ oooonooccccoocccooncnononcconnncnonnccnnnncconnnos 180 Options Card OPTIONS ve eels cust a A 182 Trajectory Starting Conditions Cards PCGX coocococcccocccnonononononananncnonononccnnncnnn ccoo ncno nenas 185 Non Linear Elastic Cable Tension Card PLYN o ooooccconnnncnnconcnonananncononnnnonononononnoninannns 186 Trajectory Starting Conditions Cards POSX ooocoococccccnoccconacconaccnonnncononcconnnccconncnnnnncnnnns 187 Print Every nth Timestep Card PREV ici isa 190 Print No Print Cards PRNx and NOPXx iii 191 Trajectory Starting Conditions Cards PRPX esseessesssssessesseseesressessrseresressesererresseese 196 10 60 10 61 10 62 10 63 10 64 10 65 1066 10 67 10 68 10 69 10 70 10 71 10 72 10 73 10 74 10 75 10 76
196. ntent of file that is not generated from FEM file EX1_OTHER INP SESAM Installjac Program version 8 1 10 June 2010 233 The comments embedded in the input file and the options descriptions in chapter 10 makes contents above self explanatory Note also the following about the contents of the file e The barge is made up of 3 noded triangular prismatic non structural NSE elements The barge mass is modelled by a PMAS geometry acting at a node 990 coincident with the barge s centroid Only the barge s side elements and the barge width PRIS are defined The barge here is of very simple geometry box shaped e The initial longitudinal positioning x direction of the jacket on the barge is prescribed using the POS1 option If POS1 is not prescribed then the jacket and barge COGs will be coincident along the z axis The initial position of the barge using POS2 is actually not necessary because the barge s nodal coordinates are defined in the FRA axis The contents of EX1_OTHER INP is first concatenated to the input converted from the FEM file and endcut data file to form the complete input file EX1_POSN_1 INP This is the file that Installjac actually runs If the jacket model does not change and one wants to avoid the process of converting files then this final complete file can be edited for new runs The analysis is performed by specifying the following on the command line installjac input ex1_posn inp or through SESAM Manager as
197. nter the Z position of the center of gravity of the struc ture EXCEPT when the jacket is in contact with the barge in which case e for structure 1 jacket enter the RELATIVE Z posi tion of the center of the jacket track with respect to the barge track THIS VALUE SHOULD ONLY BE ENTERED IN THE UNLIKELY EVENT THAT YOU ARE RESTARTING WITH THE JACKET ROLLED ONTO ONE TRACK e for structure 2 trailing or only Barge enter the Z coordinate of the center of the rocker pin The default is 0 0 feet or meters 41 50 X Rotation F10 0 Enter the X rotation angle of the structure EXCEPT when the jacket is in contact with the barge in which case e for structure 1 jacket enter the RELATIVE Z posi tion of the center of the jacket track with respect to the barge track THIS VALUE SHOULD ONLY BE ENTERED IN THE UNLIKELY EVENT THAT YOU ARE RESTARTING WITH THE JACKET ROLLED ONTO ONE TRACK The default is 0 0 degrees 51 60 Y Rotation F10 0 Use this field to define the Y rotation angle of the struc ture The default is 0 0 degrees 61 70 Z Rotation F10 0 Use this field to define the Z rotation angle of the struc ture Enter the Z rotation angle of the structure EXCEPT when the jacket is in contact with the barge in which case e for structure 1 jacket leave blank unless the yaw release option YAWR has been specified on the options card when you should enter the RELATIVE Z rotation angle of jacket track with respect to the barge
198. ntricities are applied it is distinguished between node to node length and end to end length of the element see Fig 1 4 The end to end length is the flexible part of the element and the element ends end 1 and end 2 are rigidly con nected to the element nodes node A and node B Distributed element loads act on the flexible part of the element Element end forces and moments from the distributed loading are transformed to the nodal points of the element Endcuts assumes the element ends to be located along the node to node axis of the ele ment The node to node coordinate system Xp Y pp Z and end to end coordinate sys tem Xe Ye Ze Of the element are parallel and a transformation between the systems is represented by a translation e along the node to node axis of the element and no rotation Use of eccentricities represents a more general formulation where the position of the element ends may be anywhere relative to the element nodes The node to node coordi nate system and end to end coordinate system of the element are not parallel and a transformation between the systems may include translations as well as rotations in all three directions The lengths of the eccentricity vectors e and ep are printed as posi tive values when the projection of the vectors on to the node to node axis points in pos itive direction of the x axis and negative otherwise Note that the origin of the local node to node element coordinate syste
199. o gravity z z coordinate in FRA a wave amplitude e constant e k wave number w wave frequency t time x distance IN THE DIRECTION OF THE WAVE phi wave phase The Theoretical manual contains more details Columns Entry Description and Variable Name Format 7 10 4 10 NSEx XYZNSEx A4 A7 Enter the word NSEx or XYZNSEx Installjac SESAM 176 10 June 2010 Program version 8 1 x Structure Number below Structure Number Enter the number 1 2 or 3 for x NSE1 NSE2 or NSE3 to identify the structure you are coding Structure 1 is usually the jacket Structures 2 and 3 are usually barges 12 15 Element Type A4 Enter one of the following element types TUBE Tube elements SPHE Spherical shell with constant wall thick ness PRIS Right angled triangular prism which gen erates hydrostatic properties of the struc ture typically the barge Note the left hand rule used with PRIS PBOY External point buoyancy without mass which generates hydrostatic displace ment forces only PMAS Internal mass which generates mass forces only DISC Circular plate of negligible thickness which generates hydrodynamic forces only TRIA Lamina triangular plate of zero thickness which generates hydrodynamic forces only TPPL Triangular pressure plate of zero thick ness which generates pressure and hydro static displacement forces only QPPL Quadrilateral pressure plate of zero thick ness which generates pressure
200. o set the starting positions for Structure Attachment Node Number Node Name I5 Enter the node number node name where the line is attached to the structure Structure Identifier Il Enter the number 1 2 or 3 of the structure that you want to set the starting position for Structure Attachment Node Number Node Name I5 Enter the node number node name where the line is attached to the structure Force E10 0 Enter the CONSTANT force on the cable Apply node names for nodes that are read from the FEM file model when the node name concept is applied A node name is defined by the XYZFEM card and must exist before it is applied If a node name is not found an echo of the name is printed The present card may contain a mix of user defined node numbers and node names of the FEM file model When the card name has the prefix XYZ i e XYZCWIN a message is printed to the Installjac MLG file if the node name is not found node name not defined or user node number applied No message is printed when the word CWIN is applied SESAM Installjac Program version 8 1 10 June 2010 131 10 22 Linear Damping Matrix Card DAMP This card is optional You must remove HBW and HBN cards for the barges Use this card or an ADDM card when wave motion dominates the launch analysis Use this card to input a Linear Damping matrix This matrix has six rows and six col umns Six cards will be needed for each matrix one card per row The columns co
201. oG 0 0000 0 0000 0 0000 0 0000 0 0000 0 0000 POSITION ROCKER PIN 0 0756 0 0287 0 0550 2 7464 0 0136 VELOCITY ROCKER PIN 0 0000 0 0001 0 0000 0 0002 0 0000 0 0000 ACCELERATION ROCKER PIN 0 0000 0 0000 0 0000 0 0000 0 0000 0 0000 HYDROSTATIC 0 0000E 00 0 0000E 00 4 5653E 08 1 1407E 07 1 1888E 10 0 0000E 00 MORISON DRAG 0 0000E 00 0 0000E 00 0 0000E 00 0 0000E 00 0 0000E 00 0 0000E 00 GYROSCOPIC 0 0000E 00 0 0000E 00 0 0000E 00 9 3046E 05 9 7873E 02 4 6638E 04 ADDED MASS MOMENTUM 0 0000E 00 0 0000E 00 0 0000E 00 0 0000E 00 0 0000E 00 0 0000E 00 GRAVITY 0 00000E 00 0 0000E 00 2 9038E 08 0 0000E 00 0 0000E 00 0 0000E 00 ROCKER PIN REACTION RPA 7 9611E 06 1 5989E 05 1 6596E 08 1 3679E 07 3 4917E 09 4 0273E 06 ERROR PER TIMESTEP 2 0676E 07 7 5363E 08 3 3645E 07 4 0050E 07 7 4213E 07 7 9608E 08 TOTAL FORCE 1 6628E 02 4 5337E 02 1 5009E 02 1 5709E 04 3 4959E 04 2 5220E 04 CLEARANCE FROM SEA BED 114 7775 Figure 4 4 Checking the Trim One other thing you can infer from the rocker pin heave position is the position of the deck at the stern of the barge in relation to the surface of the water We know from the RPNA card Refer to the Input Echo report how far below the deck the rocker pin is In the example the deck starts out at 5m above the rocker pin which is at the water line Adding the original deck position to the equilibrium heave position of the rocker pin puts the deck at the stern at 4 8422m above the water surface 5 0 1578
202. ocker Pin Cards Required WNCH Winch Card Required FRIC Friction Force Card Required RELF Restraint Cards Required MRP Multiple Rocker Arm Property Cards Conditional RD Rocker Dimension Cards Conditional HINGE Hinge Axis Card Conditional TIME Time Parameters Card Required Table 4 1 LAUNCH Positioning Run Cards The RESTART card is conditional because you can do a Positioning Run without it If you leave it out however you must include all the cards that would normally go in a Data Run See Table 3 1 The RPN card is usually required It is ignored however if you are launching the jacket off the side of the barge using the MRP and RD cards Use either the RPN cards or the MRP and RD cards but not both Include the HINGE card if you are working with an articulated barge 4 5 1 Setting Job Options Set the job options by entering data on the JOB and OPTIONS cards In the following example the JOB card tells the program that you are preparing a launch run Leave the rest of the columns blank to default to the new data format and Metric units Enter the following on the OPTIONS card SESAM Installjac Program version 8 1 10 June 2010 43 4 5 2 4 5 3 EQON Mates the jacket and barge s and lets the structures find their equilibrium posi tions NODL Generates the least amount of printed output JOB LAUNCH TITLE EXAMPLE POSITIONING RUN OPTIONS EQON NODL END Coding the RESTART Card The RESTART
203. odel when the node name concept is applied A node name is defined by the XYZFEM card and must exist before it is applied If a node name is not found an echo of the name is printed The present card may contain a mix of user defined node numbers and node names of the FEM file model When the card name has the prefix XYZ i e XYZNSEx a message is printed to the Installjac MLG file if the node name is not found node name not defined or user node number applied No message is printed when the word NSEx is applied Installjac SESAM 180 10 June 2010 Program version 8 1 10 52 Out of Balance Report Card OBRx OBRy OBTz This card is optional and valid for FLOAT only A maximum of 100 EQON STR and OB cards may be used Use this card to calculate the structure s hydrostatic force and moments as it is rotated about the X or Y axis or translated along the Z axis Columns Entry Description and Variable Name Format 7 8 OB A2 Enter the word OB 9 10 PSA Axis A2 Enter RX To calculate the hydrostatic moments on the structure as it is rotated about the X axis RY To calculate the hydrostatic moments on the structure as it is rotated about the Y axis TZ To calculate the translation of the struc ture along the positive Z axis 11 15 Starting the Crane Hook Load IS This field is used in one of three ways e Leave the field blank if you are not running multiple crane hook or control flooded member cases Enter the number of the c
204. of the end of the intake pipe The default is no pipe is identified Vent Valve Node at Member Wall I5 Enter the node that identifies the position of the vent valve at the member wall The position of the vent valve at the wall will be auto matically corrected to lie on the wall See the CTRL VTOL card for more details A position off the end of the member or supermember see the SMEM card for details will cause an error The default is no valve is identified Vent Pipe Node IS Enter the node which identifies the position of the end of the vent pipe The default is no pipe is identified Valve Name AS Enter any 5 characters as a name for this member The default is VM where stands for any combination of numbers from 001 999 Apply node names for nodes that are read from the FEM file model when the node name concept is applied A node name is defined by the XYZFEM card and must exist before it is applied If a node name is not found an echo of the name is printed The present card may contain a mix of user defined node numbers and node names of the FEM file model When the card name has the prefix XYZ i e XYZCTRL a message is printed to the Installjac MLG file if the node name is not found node name not defined or user node number applied No message is printed when the word CTRL is applied SESAM Installjac Program version 8 1 10 June 2010 119 10 13 Valve Wall Tolerance Card CTRL VTOL These cards are option
205. ok Load on the SLNx card columns 31 40 1 Do not enter the hook coordinates on the SLNx card 2 Do not enter the hook coordinates on the individual LINE NLIN cards SLN1 200 LINE 1 100 10000 0 LINE 1 120 10000 0 Case 3 Without SLN card 1 Hook coordinates on each line LINE 1 100 10000 0 32 105 40 Installjac SESAM 210 10 June 2010 Program version 8 1 LINE 1 120 10000 0 32 105 40 Case 4 Two slings attached to different nodes in one hook sequence Only hook coordi nates that the slings are attached to are specified IN 0 20 LINE 1 781 10000 0 50 00 LINE 1 799 10000 0 50 00 LINE 1 701 10000 0 50 00 LINE 1 719 10000 0 50 00 SLINI peer ppp Ll 0 LINE 1 401 10000 0 50 00 LINE 1 419 10000 0 50 00 SESAM Installjac Program version 8 1 10 June 2010 211 10 69 Stability Report Card STRx and STRy This card is optional and valid for FLOAT only Use this card to calculate the hydro static moments on the structure as it is rotated about either the X or Y axis while it maintains vertical equilibrium Note A maximum of 100 EQON STR and OB cards may be used Columns Entry Description and Variable Name Format 7 10 STR or y A4 Enter the word STR and x or y depending on the axis PSA Axis Enter X To calculate the hydrostatic moments on the structure as it is rotated about the X axis S
206. olume that the imaginary member would hold It 1s up to you to point this card at nodes that are connected by a member with this geom etry The material group number that you define on this card identifies the material that the member will be flooded with Normally you will want this to be sea water Make sure that you identify the correct MATE card otherwise you might be flooding the member with steel The TUBE card below floods a tube between nodes 1 and 2 It floods it using the mate rial defined on MATE card number 3 The program calculates the volume of the tube using the OD and wall thickness of GEOM card number 4 The last field shows how much to flood the tube In this case it floods 45 percent of the tube CTRL TUBE 1 2 7 3 4 45 Using ETUB Cards ETUB cards control the internal air pressure of a tube The tube is defined the same way as on a TUBE card You define the starting and ending nodes of the tube One thing to remember is that the first node identifies the flood valve The first node must always be at a lower elevation than the second node Again the material group number identifies the material that the program will use to flood the member Make sure that you aren t flooding with steel The geometry group number is used to determine the inside diameter for the volume calculation You can enter numbers in the last field on the card in two ways A number less than 100 represents the percentage of volume flood
207. om nodes 21 19 and 23 Together these two prisms create the main body of the barge The next three prisms define the prow Prism 3 connects nodes 15 21 and 20 Number 4 connects nodes 15 16 and 20 The last prism connects nodes 16 20 and 19 NSE2 PRIS 2 23 22yr 2175 5 NSE PRIS Lp 19 23 21 5 5 NSEZ PRIS 3 21725 20 5 NSE2 PRIS 4 16 20 15 5 NSE2 PRIS 5 20 16 19 5 NSE2 PMAS 6 24 4 4 The prisms define the volume of the barge The geometry group number for the five Installjac SESAM 28 10 June 2010 Program version 8 1 PRIS elements are the same because these elements are all prisms with the same geo metric properties Use point mass elements to show how the weight of the barge is distributed The pro gram uses the mass to determine the trim The trim is the way that the empty barge sits in still water The program uses two coordinates the center of gravity and the center of buoyancy to determine trim The barge is in equilibrium when the center of gravity and the center of buoyancy line up when their X and Y coordinates are equal The center of gravity should be above the center of buoyancy otherwise the barge will flip when any roll motion is added If the deck of the barge were level the coordinates for the two points might be Center of X Y Z Gravity 45 0 0 0 5 6 Buoyancy 45 0 0 0 5 0 Table 3 2 Example Coordinates for a Level Deck To raise t
208. one of these parameters may be specified as the program calculates one parameter from the other Note also that the density of the gas is specified on the MATE Materials card for the corresponding VTUB element Installjac SESAM 152 10 June 2010 Program version 8 1 Columns Entry Description and Variable Name Format 7 10 GEOM A4 Enter the word GEOM 11 15 Blank 16 20 Geometry Group Number I5 Enter the Geometry Group Number of the VTUB that this card accompanies 21 30 Vent Valve Gas Pressure I5 Enter the gas pressure that the pump delivers at the vent valve This entry is required if the vent valve flow rate is not specified in columns 31 40 If this entry is not speci fied the program calculates the pressure pounds ft English or Newtons m Metric Note The loss coefficient on the GEOM VTUB card must take into account where the pressure is measured 31 40 Vent Valve Gas Flow Rate I5 Enter the gas flow that the pump delivers at the vent valve This entry is required if the vent valve gas pres sure is not specified in columns 21 30 If this entry is not specified the program calculates the rate t second English or m second Metric Note The loss coefficient on the GEOM VTUB card must take into account where the gas is delivered on the valve pipe SESAM Installjac Program version 8 1 10 June 2010 153 10 35 Barge Sides Cards HBNx XYZHBNx These cards are required for all barge structures Use this
209. or the jacket because e This is the only structure for which the program can generate loads You can use the loads for this structure to analyze the stress on the jacket during the launch this is done at present only at specified times e You can only launch structure 1 Structure 2 generally defines the barge from which the jacket is launched For very long SESAM Installjac Program version 8 1 10 June 2010 17 3 3 2 3 3 3 jackets it can be used as the lead barge in an articulated barge arrangement You can also use structure 2 to define a second jacket instead of a barge For example two parts of a jacket in the water Structure 3 again could be anything Its most common use however is as the trailing barge in an articulated barge arrangement Jacket model from Preframe or Genie Installjac extracts the jacket nodes and elements from an FEM file and creates the appropriate Installjac cards Corrections for overlapping beam elements at tubular joints can be done by endcuts or eccentricities as described in Chap 1 9 1 The file endcut inp containing endcut data of the various members must also be generated from Preframe for the FEM file conversion to work The endcut data is used in Installjac for the computation of correct masses and buoyancies Note that the correction for mass sums in Preframe is done using eccentricities For more information about Preframe see the Preframe User s Guide Jacket FEM Barge FEM
210. ormat TRACE A5 Enter the word TRACE Name of the routine to be debugged A6 Enter the name of the routine to be debugged Main Trace Level 13 This integer governs the main trace level of individual routines At a level of 1 a single line of trace output is written to stream 7 At a level of 2 the main results are also output At levels greater than 2 the output is increasingly more detailed however levels are rarely higher than 6 Exact output is dependent upon each sub routine The default is 0 Integer parameters to pass 5I5 Enter up to five different integer parameters to pass to the routine that you entered in columns 7 11 Values must be entered in discrete columns 16 20 21 25 26 30 31 35 and 36 40 Real parameters to pass 4F10 0 Enter up to four different real parameters to pass to the routine that you entered in columns 7 11 Values must be entered in discrete columns 41 50 51 60 61 70 and 71 80 Installjac SESAM 218 10 June 2010 Program version 8 1 10 74 Starting Velocities Cards VELx These cards are required for LAUNCH only Use these cards to define the starting velocities for structures during LAUNCH The default is zero for all degrees of free dom The velocities are relative to the Fixed reference Axis FRA system Columns Entry Description and Variable Name Format 7 10 VELx A4 11 20 21 30 31 40 41 50 51 60 Enter the word VELx x Structure Identifier below Struc
211. perties cit da nl A ds 79 Global Parameters dt A A eed Ets 79 Elow Pareto ni iia 79 Gravity Cardiaca ri is 79 Running the Programm mini iii eis che ellis Maelo ie eae es 79 Checking the Reports eiii da AA sa 80 Mass and Displaced Volume When Fully Submerged Report oonconccnnncnoconoccncnnocnnnnnconcconaconannss 80 Jacket Equilibrium Before Upending ccssccssssccssssccssssccssssccssssccssscscssssscsssssooss 1 RS TN 81 WIRED A E O O NO secoguecacerhas 81 Getting Rea dyoer fcaei awa ee A en ae ea i a eee 81 Task Outhme size taa e Werte dit 81 Entering Jacket Equilibrium Run Cards cece ceeceseeseesseceseeseceseeeseecaeecaeceseceeeeaeesaecaecneeeseeeees 82 Setting Job Options im AA eee 82 Coding thes RESTART Cardi redarea a eee eea o Ee e T a E A aciendo 83 Defining the Track POS1toms iii lili laa de 83 Setting the St rting POSION ui ii at tee 83 Zc Etanslation ii ca 84 X ROCA OMS iii iii il eiii sities Hasek blabictilssoutbleiadt iat 84 111 8 5 4 3 98 5 5 8 5 6 8 6 8 7 8 7 1 8 7 1 1 8 7 1 2 8 7 2 8 7 3 8 8 9 9 1 9 2 9 3 9 4 9 5 9 5 1 9 5 2 9 5 3 9 5 3 1 9 5 3 2 9 5 4 9 5 4 1 9 5 4 2 9 5 4 3 9 5 4 4 9 5 5 9 5 6 9 6 9 7 9 7 1 09 7 2 9 8 10 10 1 10 2 10 3 e10 4 e10 5 10 6 e10 7 e10 8 10 9 10 10 10 11 10 12 10 13 Table of Contents Yo ROtat A ON 84 Identifying the Positioning RUM esseci sisit eei ii EEEE E 85 Checking Node POSILIONS s
212. plied Installjac SESAM 160 10 June 2010 Program version 8 1 10 40 Job Card JOB This card is required The JOB card identifies the program option and version that you are running and sets defaults that apply to the entire job There is no default The job card must be the first card in the input excluding comment cards Columns Entry Description and Variable Name Format 1 3 JOB A3 Enter the word JOB 5 10 Program Option A4 Enter LAUNCH To examine how a jacket and barges inter act during a launch operation FLOAT To upend and install a jacket that has been launched 12 18 Units of Measure A7 This entry sets the default units of measure for the entire job English or Metric The default is Metric 20 23 Input Echo Print A4 Enter ECHO to obtain a printed report of the input cards Installjac cards 25 31 FEM files as input A7 Enter CONVERT to convert the jacket and barge input from the FEM files this requires the specification of the various files that data are to be converted from to form a complete input for an Installjac run see the examples in the last chapter of this manual 33 35 Data Format Version Number A3 Enter 8 0 This is the default data format version number 36 41 Option for using Eccentricities or Endcuts A7 Enter ECCENT to apply element eccentricities in the calculation of the element end positions If ECCENT is not present endcut values are applied SESAM Installjac Pro
213. point of the element length 2 The rotational velocity whose plane will be at some angle to the plane of the translation velocity profile The program derives the solution to the overall drag force from a spiral vector analysis It is not economic however to analyze all members using this method so the simplifi cations are made if the velocity profiles fall within limits set on this card The details of the simplifications are described below Default Significant Froude Number 04 velocity profile ratio 1 velocity alignment angle 5 7 Columns Entry Description and Variable Name Format 7 10 11 20 21 30 ERRL A4 Enter the word ERRL Significant Froude Number Squared F10 0 Enter the significant Froude Number Squared y gD where D Diameter of tube g Acceleration of gravity V Velocity limit If either the translational velocity Vr or the rotational velocity at the end of the TUBE VR is less than the velocity limit then the drag forces are calculated sepa rately for each velocity component The default is 04 dimensionless Velocity Profile Ratio F10 0 Enter the velocity profile ratio Vr Vp Ve Vx The analysis chooses the dominant velocity profile 1f the ratio of the translational to rotational tip velocity exceeds SESAM Installjac Program version 8 1 10 June 2010 139 the velocity profile ratio It then resolves the other pro file into the components aligned with it and at 90
214. r cards An error will occur if the members are not continuous and the program will stop ONLY ONE FREE SURFACE WILL BE ALLOWED IN THE SUPERMEMBER 1 e it is assumed that the change in diameters or the width of ring stiffeners is small entrapped fluid at member junctions is ignored Warnings will be issued during the data check if members are not co linear toler ance 1 degree and the program will continue Warnings will be issued during the time history and the program will continue if more than one free surface is caused by non co linear members All internal free surfaces will be assumed at the same horizontal level for the purpose of calculation of the bal last distribution It is assumed that the total internal volume is equal to the sum of the individual member volumes i e change in section geometry at member joints for non co linear members is ignored Columns Entry Description and Variable Name Format 7 10 4 10 CTRL XYZCTRL A4 A7 Enter the word CTRL or XYZCTRL 12 15 SMEM A4 Enter the word SMEM 16 20 Structure Identifier 15 default is Jacket i e 1 21 25 1st Node 15 26 30 Enter the first node number node name of the element 2nd Node I5 SESAM Installjac Program version 8 1 10 June 2010 123 36 40 41 45 Enter the second node number node name of the ele ment Material Group I5 Enter the material group number of the element Material groups are specified on MATE cards Note If the ma
215. r the height of the wave feet or meters 41 50 Phase Angle p Degrees F10 0 Enter the phase angle The default is 0 0 degrees 51 60 Heading Angle b Degrees F10 0 Enter the direction of the wave The default is zero 0 which corresponds to propagation along the positive X axis FRA The default is 0 0 degrees SESAM Installjac Program version 8 1 10 June 2010 221 10 76 Winch Card WNCH This card is conditional and valid for LAUNCH only Use the WNCH card to define the maximum winch force and the cut off velocity for the jacket during a launch run The maximum winch force is a threshold value of force It is held constant until the speed of the jacket exceeds the cut off velocity At that point the program reduces it to maintain the cut off velocity The winch is disconnected if the winch force equals zero It is reconnected if the relative speed falls to the cut off velocity The winch is discon nected regardless of the relative speed if the rocker arm becomes operational Columns Entry Description and Variable Name Format 7 10 WNCH A4 Enter the word WNCH 11 20 Maximum Force F10 0 Enter the maximum force of the winch pounds force English or Newtons Metric 21 30 Cut off Velocity F10 0 Enter the jacket velocity at which to disconnect the winch The jacket can t launch if this value is set to zero and the jacket weight cannot overcome static friction feet second or meters second See JOB card Inst
216. rag and added mass coefficients for TUBE SPHE DISC and TRIA elements will be set to their defaults Use the GEOM continuation card to specify the viscous drag and added mass coefficients for TUBE SPHE DISC and TRIA elements Note For control flooded tubes TUBE ETUB this card is ignored The input for the TUBE SPHE DISC and TRIA elements are described below first followed by the descriptions for the VTUB elements Columns Entry Description and Variable Name Format 7 10 GEOM A4 Enter the word GEOM 11 15 Blank 16 20 Geometry ID Number I5 21 30 31 40 Enter the Geometry ID Number of the TUBE SPHE DISC or TRIA that this card accompanies Added Mass Coefficient Cy F10 0 Enter the added mass coefficient Cy The default is 1 0 slugs English or kilograms Metric Viscous Drag Coefficient Cp F10 0 Enter the viscous drag coefficient Cp The defaults are TUBE 0 7 SPHE 0 3 DISC 1 0 TRIA 1 5 dimen sionless Note If the added mass or drag coefficient value is lt 1 E 6 then the default value will be used This card is required only when the vent valve gas pressure or gas volume flow rate is specified by the user to model a pump If this card is not entered both the vent valve gas pressure and gas volume flow rate are calculated by the program Use the GEOM continuation card to specify the gas pressure at the vent valve OR the gas volume flow rate at the vent valve for VTUB elements Note that only
217. rane hook load to use when analyzing multiple control flooded member cases This number refers to one of the crane hook loads defined using SLN NLIN PLYN FORC LINE CWIN and FINI cards See Multiple Control Flood ing Analysis Example in the FINI card description Enter the first crane hook load case to run when ana lyzing multiple crane hook load cases See Multiple Crane Hook Analysis Example in the FINI card description 16 20 Blank 21 25 Starting Control Flooded Member Case IS This field is used in one of three ways 1 Leave the field blank if you are not running multiple crane hook or control flooded member cases 2 Enter the number of the control flooded member case to use when analyzing multiple crane hook loads This number refers to one of the control flooded SESAM Program version 8 1 10 June 2010 26 30 31 35 36 40 41 50 members defined using TUBE ETUB OPEN CLOS and FINI cards See Multiple Crane Hook Analysis Example in the FINI card description 3 Enter the first control flooded member case to run when analyzing multiple control flooded member cases See Multiple Control Flooding Analysis Example in the FINI card description Blank Initial Increment Number Enter zero 0 to start at the position entered on the POS card Enter a number to start at a position other than the starting position For example if you enter one 1 in this field the system will increment the sta
218. rd Use the GEOM cards to define the geometric properties of the elements in the structures The geometric properties are such things as the outside diameter wall thickness ballast valve setting and length The table below shows the inputs that are expected in the six input fields of this card Element INPUT Type 21 30 31 40 41 50 51 60 61 70 71 80 TUBE Outside Wall Ballast Cut 1 Cut 2 Diameter Thickness Valve Set ting SPHE Outside Wall Ballast Diameter Thickness Valve Set ting PRIS Length PMAS Ixx Ixy Ixz lyy Iyz Izz DISC Outside Diameter Note TRIA elements require no input on this card but do require a GEOM continuation card Table 10 1 TRIA Geometric Properties Do not enter GEOM cards for PBOY TRAP TPPL or QPPL elements Note TRAP elements are generated internally by the HBN cards to produce the hydro dynamic properties of the barge plating Columns 7 10 12 15 Entry Description and Variable Name GEOM Format A4 Enter the word GEOM Element Name A4 Enter the type of element being described Valid entries are TUBE SPHE PRIS PMAS Tube elements Spherical shell with constant wall thick ness Right angled triangular prism which generates hydrodynamic forces only Internal mass which generates mass Installjac 148 16 20 21 30 31 40 41 50 SESAM 10 June 2010 Program version 8 1 forces only DISC Cir
219. rd to describe the main secondary and supple mentary rocker arms Columns Entry Description and Variable Name Format 7 10 RPNx A4 Enter the word RPNx x Rocker Pin Identifier below Rocker Pin Identifier For x enter Aorl For main rocker arm RPNA RPN1 B or 2 For secondary rocker arm RPNB RPN2 C or 3 For supplementary rocker arm RPNC RPN3 11 20 Rocker Height F10 0 Enter the distance from the rocker pin to the top of the rocker feet or meters See JOB card Rocker Rocker Barge height 21 30 Track Length F10 0 Enter the length of the rocker feet or meters See JOB card Main rocker length la 2 rocker length le 3 rocker length BS 34 rocker 5 N am Y 7 SESAM Program version 8 1 10 June 2010 31 40 Angle Freedom Enter the maximum angle that the rocker can open degrees For the main rocker arm this is the maximum angle between the barge and the front of the rocker arm The origin of the angle is the rocker pin For the other two rocker arms it is the angle between the front of the rocker and the back of the previous rocker feet or meters See JOB card The default maximum angle is 180 Angle of freedom 0 Installjac 205 F10 0 Installjac SESAM 206 10 June 2010 Program version 8 1 1066 Reynolds Number Scale Card SC1 This card is optional Use it to scale the Reynolds Number when performing scale model tests on TUBE elements This factor le
220. re data from the Restart 1 file created by a Float Positioning Run To do all the things outlined above you will e Enter card data that defines the member flooding sequence and crane hook loads When you execute the program it SESAM Program version 8 1 Installjac 10 June 2010 89 1 Places the jacket at the starting position 2 Executes the first EQON card and tries to find an equilibrium posi tion Repeats these calculations for each step on each EQON card 3 Generates the reports After the run you should check the results using the reports generated by the program 9 5 Entering Upending Run Cards The following table lists all of the cards that the program uses during an Upending Run The table is followed by instructions for completing the cards Card Description Status JOB Job Card Required TITLE Title Cards Optional EEEE Comment Cards Optional OPTIONS Options Cards Required RESTART Restart Card Conditional MMVE Maximum Movement per Iteration Card Required MERR Maximum Residual Error Card Required MXNI Maximum Number of Iterations Card Required POS1 Jacket Trajectory Starting Condition Card Conditional EQON Free Floating Equilibrium Card Required HYD1 Buoyancy Multiplication Factor Card Required NOD Node Printing Cards Optional PRN NOP Print No Print Cards Required CTRL Control Flooding Cards Required FORC Applied Forces Cards Co
221. rectly It also tells how to determine if the trim of the jacket is correct for upending the jacket This chapter is helpful to all users SESAM Installjac Program version 8 1 10 June 2010 15 2 1 2 2 2 Upending and Lowering a Jacket This chapter describes how crane hook loads and controlled flooding is used to upend and place a jacket after it has reached equilibrium Describing Installjac Cards This chapter contains the technical reference material for the experienced and the novice users The organization and format of each card used in Installjac is described in detail here Conventions Throughout this User s Guide the names of the two modules of the program LAUNCH and FLOAT are in CAPITAL letters Input examples are given in the new comma separated format Two or more sequential commas on a data line represents either default values or blank fields see the chapter Describing Installjac CARDS for syntax of each input option Accessing Installjac To use Installjac you need to create input file s with specifications of model geometry data and other necessary options in a text editor Installjac is then accessed from the command line DOS prompt by the following installjac exe input lt inputfile gt inp output lt output log gt vtfile lt vtfile gt The names enclosed in lt gt are specified by the user The specification of the output and vtf file is optional they default to the name of the input file
222. rogram version 8 1 10 June 2010 99 10 Describing Installjac Cards This chapter of the Installjac manual provides reference information about all of the Installjac cards and reports It lets experienced users quickly look up syntax and other detailed information about particular cards Conventions Both fixed and comma separated formats can be used as input with Installjac In describing the various options in this chapter the columns fields refer to the fixed for mat These fields including the blank ones are delimited by commas when working with the comma separated input format Status fields can have three entries Required The program requires information from this card or field The program editor either 1 Uses the defaults for all fields on this card if the card is not entered or 2 Fails if this card is not entered infor mative messages are written to the output text file Optional The program does not require the card or field The program uses none of the data or defaults for this card or field if the card is not entered Conditional The program requires this card or field or its default settings in some situations Installjac SESAM 100 10 June 2010 Program version 8 1 10 1 FEM file Conversion cards All of the following cards are needed when the geometry is translated from an FEM file The input syntax format is also shown below See also Figure 10 1 AINP Final input file this is generated and
223. rol Flood ing Analysis Example in the FINI card description 3 Enter the first crane hook load case to run when ana lyzing multiple crane hook load cases See Multiple Crane Hook Analysis Example in the FINI card description Ending Crane Hook Load 15 This field is used in one of three ways 1 Leave the field blank if you are not running multiple crane hook or control flooded member cases 2 Leave the field blank if you are running multiple con trol flooded member cases 3 Enter the last crane hook load case to run when ana lyzing multiple crane hook load cases See Multiple Crane Hook Analysis Example in the FINI card description Starting Control Flooded Member Case 15 SESAM Program version 8 1 10 June 2010 26 30 31 35 36 40 41 50 51 60 61 70 71 80 This field is used in one of three ways 1 Leave the field blank if you are not running multiple crane hook or control flooded member cases 2 Enter the number of the control flooded member case to use when analyzing multiple crane hook loads This number refers to one of the control flooded members defined using TUBE ETUB OPEN CLOS and FINI cards See Multiple Crane Hook Analysis Example in the FINI card description 3 Enter the first control flooded member case to run when analyzing multiple control flooded member cases See Multiple Control Flooding Analysis Example in the FINI card Ending Control Flooded Member Case
224. rox 5000 when inaccuracies will not be important b Valve is either fully open or closed c Itis the same for water gas Leave this field blank for SPHE PRIS or DISC ele ments feet or meters for TUBE slug feet or kilogram m for PMAS dimensionless for VTUB 61 70 End cut 2 I or Vent Valve Diameter F10 0 Enter end cut 2 if the Element Type columns 17 20 is TUBE The end cut is the actual distance from the sec ond node to the end of the element Enter the coupling mass moment of inertia I if the Element Type columns 17 20 is PMAS Enter the Vent Valve Diameter for VTUB elements Leave this field blank for SPHE PRIS or DISC ele yz Installjac SESAM 150 10 June 2010 Program version 8 1 ments feet or meters for TUBE VTUB slug feet or kilogram m for PMAS 71 80 I or Vent Valve Loss Coefficient F10 0 Enter the mass moment of inertia Izz about the z axis if the Element Type columns 17 20 is PMAS For rect L m y7 x7 12 for sphere I 2m1 5 1 y L Enter the Intake Valve Loss Coefficient for VTUB ele ments Leave this field blank for TUBE SPHE PRIS or DISC elements slug feet or kilogram m dimensionless for VTUB SESAM Installjac Program version 8 1 10 June 2010 151 10 34 GEOM Continuation Card GEOM This card is required only when the viscous drag or added mass coefficients are some thing other than the defaults If this card is not entered both the viscous d
225. rre spond to the six degrees of freedom x y and z translational freedoms and x y and z rotational freedoms Cards one two and three correspond to the x y and z transla tional freedoms respectively Likewise cards four five and six correspond to the x y and z rotational freedoms respectively The added mass and damping are values about centre of gravity of the structure Units must be consistent with units applied in the analysis Columns Entry Description and Variable Name Format 7 10 11 15 16 20 21 30 31 40 41 50 51 60 61 70 71 80 DAMP A4 Enter the word DAMP Structure Identifier I5 Enter the number 1 2 or 3 of the structure Blank X Translational F10 0 Enter the linear damping value for the X translational degree of freedom The default is 0 Y Translational F10 0 Enter the linear damping value for the Y translational degree of freedom The default is 0 Z Translational F10 0 Enter the linear damping value for the Z translational degree of freedom The default is 0 X Rotational F10 0 Enter the linear damping value for the X rotational degree of freedom The default is 0 Y Rotational F10 0 Enter the linear damping value for the Y rotational degree of freedom The default is 0 Z Rotational F10 0 Enter the linear damping value for the Z rotational degree of freedom The default is 0 Installjac SESAM 132 10 June 2010 Program version 8 1 10 23 Diffraction Force
226. rting position given on the POS card by one then begin the analysis Last Increment Number Enter the last increment that you want processed during the analysis For example 1f the analysis started with increment 0 and this field were 10 the system would analyze the first 11 structure positions This number must be greater than or equal to the Initial Increment number Increment Value Enter the amount by which to change the position of the structure for each increment degrees when column 10 1s either X or Y Rotation length when it is Z Transla tion The defaults are 10 for Z and 1 for X Y Installjac 181 I5 I5 F10 0 Installjac SESAM 182 10 June 2010 Program version 8 1 10 53 Options Card OPTIONS This card is required The OPTIONS card controls the 1 Processing options 2 Reports that get generated 3 Output files that get generated You can enter more than one OPTIONS card The default is no options are set See PRN and NOP for default printing for LAUNCH Columns Entry Description and Variable Name Format 1 7 OPTIONS A7 Enter the word OPTIONS 9 77 Control Options 12A4 Use these twelve fields to control the processing print ing and file generation options The columns for the option fields are 9 12 14 17 19 22 24 27 29 32 34 37 39 42 44 47 49 52 54 57 59 62 64 67 69 72 and 74 77 The Program Execution Options are DATA The program stops after checking and defining the
227. ructure We can use this report to check the items listed above 6 6 2 1 Checking the Depth of the Dive See Section 5 6 2 4 6 6 2 2 Checking Velocity Use the COG velocity fields to check the velocity of the jacket By the end of the run the jacket should have no velocity or rather shown only slightly oscillate about a fixed position At that point you would be ready to attach crane hooks and begin the upend ing sequence 6 7 Plotting the Structure Positions Animations of the jacket and barge motions can be performed in Xtract using the gen erated VTF file X Y plots of the various barge and jacket component results as shown in Table 5 2 can be plotted using Xtract SESAM Installjac Program version 8 1 10 June 2010 75 7 Checking a Jacket Before Upending 7 1 Why Perform this task to e Verify that the jacket is coded correctly for FLOAT e Set some global parameters that apply to the data throughout all of FLOAT e Let the program calculate some initial values that are applied throughout the rest of FLOAT E2 When You only need to run this task if you are analyzing a structure that has not been pro cessed using the STR1 option of LAUNCH For example you might use this task if you wanted to make a preliminary check of the hydrostatic properties of the jacket before launching it This type of check would tell you if the jacket would float after the launch You would need to run this task first to make sure that the s
228. s and updates the Restart file which contains the structure block data plus the position data The updated Restart file is still called a Restart 1 file Checking the Reports Running the program with the EQON card and NODL option produces these reports e Reports of Position and Properties of Structure for Each Iteration e Reports of Position and Properties When the Structure is in Equilib rium The Iteration Report This report shows the position buoyancy moments and stability of the jacket for each iteration Use this report to e Determine if the jacket has reached an equilibrium position e Check its trim See section The Iteration Report for a description of how to use this report The Equilibrium Report This report shows information about the structure in its equilibrium position and is Installjac SESAM 98 9 8 10 June 2010 Program version 8 1 written when the options OBXx and STRx are used See the description of the options in Chapter 10 for what the x s stand for Plotting the Upending Sequence We can check the upending sequence graphically by animating the various equilibrium iteration stages for the different flooding and hook loadings Note that only the last position of each hook flooding sequence is of interest for design purposes To do this we specify VTFF on the OPTIONS card to create a new VTF file Trajectory plots are at present not available in the upending analyses SESAM Installjac P
229. s the free floating characteristics of the jacket FLOAT is used during the upending of a jacket FLOAT calculates only hydrostatic equilibrium and does not account for wave eleva tion FLOAT calculates a number of equilibrium positions not time steps as in the LAUNCH analysis in a iterative procedure Residual forces and stability of the equa tion system are checked and motion controlled for each iteration to ensure a stable movement of the structure where the residuals are gradually reduced until final equilib rium is attained Positions forces residuals and stability are printed for every iteration on the log file The equation system during the upending is formed directly in a parasitic coordinate system PSA that moves with the structure The origin of the PSA system is at all stages of the analysis at the water line vertically above or below the centre of gravity of the structure The XY plane coincide with the water surface and the XYZ axes are par allel to those of the fixed reference system FRA This means that movement of the structure in the X and Y directions are by definition equal to zero A static equation system is formed and solved for the vertical heave movement in Z direction and the roll and pitch rotations X and Y rotations 1 e three components the other components are zero unless crane loads are included The equation system is solved at every iteration step during all iterations of the upend ing
230. senting the line between the sheave and the hook Structure Identifier structure 2 Enter the number 1 2 or 3 of a structure Structure Attachment Node Number Node Name Enter the node number node name on structure 2 where the line is attached to the structure or the node number at the hard point Leave this field blank if this is the FIRST card of a sling assembly type 2 SLN2 1 e representing the line between the sheave and the hook Unstretched Length Enter the unstretched length of the cable feet or meters Format A4 A7 Il I5 A16 Il I5 A16 F10 0 Enter data in the following three fields if this line is not part of a sling assembly 51 60 61 70 71 80 Hook X Coordinate FRA Enter the X Coordinate in the Fixed Reference Axes FRA of the crane hook feet or meters Hook Y Coordinate FRA Enter the Y Coordinate in the Fixed Reference Axes FRA of the crane hook feet or meters Hook Z Coordinate FRA Enter the Z Coordinate of the crane hook in the Fixed F10 0 F10 0 F10 0 Installjac SESAM 172 10 June 2010 Program version 8 1 Reference Axes FRA system FLOAT only applies ver tical loads which is why you only have to enter the Z coordinate feet or meters Apply node names for nodes that are read from the FEM file model when the node name concept is applied A node name is defined by the XYZFEM card and must exist before it is applied If a node name is not fou
231. should be set for use throughout the rest of the installation simulation tasks New users will find this chapter especially helpful Positioning the Jacket and Barge Structures Before a Launch This chapter covers the first task in launching a jacket e g positioning both the jacket and the barge You will learn how to verify that your structures both the jacket and the barge float and how to determine if the trim of the two structures is correct for the launch New users will find this chapter helpful Launching a Jacket This chapter describes how to simulate the behavior of both structures as the jacket is launched off the barge All users can benefit from reading this chapter because the data generated by this task shows how stable both structures are during the launch Analyzing a Jacket After Separation This chapter describes how to analyze the behavior of the jacket from the time it separates from the barge until it reaches a stable state in the water and is ready to be upended All users will find this chapter helpful Checking a Jacket Before Upending This chapter describes a task that must be performed only if the previous tasks have not been performed It verifies that the jacket is coded correctly for the upending analysis This chapter is helpful to all users Reaching Jacket Equilibrium Before Upending This chapter describes the task of finding the equilibrium position of the jacket after verifying that the jacket is coded cor
232. sitive X direction of the barge is toward the stern and 2 You enter nodes for the starboard side of the barge in clockwise order 5009 Figure 3 12 Hydrodynamic Barge Description 3 5 5 Material Properties You must assign different material group numbers to different combinations of material properties Not all elements have material properties and therefore do not require MATE cards Material properties are defined on MATE card MATE 1 7 850E 3 MATE 2 9 250E 3 MATE 3 2 184E 6 3 5 6 Geometric Properties The geometric properties describe such things are the diameter thickness length added mass coefficient and viscous drag coefficient Each element requires different inputs Refer to GEOM card in Describing Installjac cards A sample set GEOM cards might look like this GEOM TUBE 1 10 0 0 1073 0 0 GEOM DISC 2 10 0 GEOM PMAS 3265 292E 6 GEOM PMAS 4546 750E 6 0 0 0 0 G EOM PRIS 5 30 SESAM Program version 8 1 Installjac 10 June 2010 31 3 5 7 Global Parameters The last set of cards that we need set such things as the water depth current profile and acceleration of gravity LAUNCH can use two global parameter cards FLPR Flow Parameters ACCGGravity 3 5 7 1 Flow Parameters The FLPR Flow Parameters card controls the water depth density and flow speed at the surface Below is a card setting depth to 25 meters and density to 1000 kilograms
233. sla tion value equal to zero 0 0 8 5 4 2 X Rotation Leave this field blank if the structure was coded such that the widest part of the base of the structure is along the Y axis If the structure was not coded that way enter the angle of rotation that would be needed to turn it that way 8 5 4 3 Y Rotation Leave this field blank if the structure was coded such that a line from the base of the structure to the top points in the positive X direction of the FRA If the structure was not coded that way enter the angle of rotation that would be needed to turn it that way SESAM Installjac Program version 8 1 10 June 2010 85 8 5 5 8 5 6 9 6 The correct starting position for FLOAT would be coded on a POS card like this POS1 0 0 90 0 90 0 Identifying the Positioning Run The EQON card tells the program that you are running a FLOAT Positioning run The EQON card has a number of input parameters none of which really apply during a positioning run Just enter the card by itself This will tell the program to run a maxi mum of 100 iterations in its attempt to find the equilibrium position of the jacket Checking Node Positions Use the NOD1 card to check positions of different parts of the structures Using this card will help you determine if your structure is floating at the water surface or not NOD1 2 5 30 32 Here is a example of what all the cards would look like together JOB FLOAT TITLE Float Equilibrium
234. structure that you want to set the starting position for 26 30 Structure Attachment Node Number Node Name I5 A16 Enter the node number node name where the line is attached to the structure 31 40 Stiffness F10 0 Enter the stiffness of the cable pounds feet or Newtons meter 41 50 Unstretched Length F10 0 Enter the unstretched length of the cable feet or meters Enter the following three cards if this line is NOT part of a sling assembly 51 60 Hook X Coordinate FRA F10 0 Enter the X Coordinate in the Fixed Reference Axes Installjac SESAM 162 61 70 71 80 10 June 2010 Program version 8 1 FRA of the crane hook Hook Y Coordinate FRA F10 0 Enter the Y Coordinate in the Fixed Reference Axes FRA of the crane hook Hook Z Coordinate FRA F10 0 Enter the Z Coordinate in the Fixed Reference Axes FRA of the crane hook Apply node names for nodes that are read from the FEM file model when the node name concept is applied A node name is defined by the XYZFEM card and must exist before it is applied If a node name is not found an echo of the name is printed The present card may contain a mix of user defined node numbers and node names of the FEM file model When the card name has the prefix XYZ i e XYZLINE a message is printed to the Installjac MLG file if the node name is not found node name not defined or user node number applied No message is printed when the word LINE is applied SESAM
235. t have to increase this number for larger structures With this value set to 1 0 and Number of Increments see above set to 100 the jacket will have 100 seconds to reach a stable state SESAM Installjac Program version 8 1 10 June 2010 73 6 4 4 6 4 5 6 5 Starting Time This value controls the start time of time incrementation The total time of an analysis is the Starting Time plus the Time Increment times the number of exe cuted increments This should be the last time that was reported on the Degree of Freedom report from the LAUNCH run TIME 100 1 0 30 0 Controlling Print Options You can include Node Printing NOD cards in the run These cards will help you fol low the trajectory of the jacket in the water Node cards tell the program to print the positions of nodes that you specify In the example below the program would print the positions of nodes 1 and 2 on the jacket Nodes 1 and 2 are at the base of the jacket You can use the position reports for these nodes to track the depth of dive of the jacket NOD1 1 2 Other Options You can enter many other cards during a run For example you can enter cards that control Hydrodynamic Parameter Coefficients Control Flooded Members Crane Hook Loads Current Parameters Wave Parameters Examples of using some of these other cards are included in following task descrip tions Here is a example of what the cards for this task would look like together J
236. table is followed by instructions for completing the cards Card Description Status JOB Job Card Required TITLE Title Cards Optional ee Comment Cards Optional OPTIONS Options Cards Required NODE Node Coordinate Cards Required STRE Structural Element Cards Required NSE Non structural Element Cards Required MATE Material Properties Cards Required GEOM Geometric Properties Cards Required HBW Barge Width Cards Required HBN Barge Sides Cards Required SESAM Installjac Program version 8 1 10 June 2010 21 FLPR Fluid Property Card Required ACCG Acceleration of Gravity Card Required 3 5 1 3 5 2 Table 3 1 LAUNCH Data Run Cards Setting Job Options Set the job options by entering data on the JOB and OPTIONS cards see Chapter 10 for description of the various options used in Installjac In the example below the JOB card tells the program that you are preparing a LAUNCH run By leaving the rest of the columns blank the program defaults to the new data format Version 7 0 and Metric units kg m The OPTIONS card has these entries DATA Checks the structure data and saves it on the RESTART 1 file PPEL Prints the properties for each element including the calculated mass value You can also add titles and comments using TITLE and cards as in the following example in fixed and comma separated format respectively JOB LAUNCH TITLE DD9L1 DOUBLE BARGE J
237. tation relative to FRA X Y Z RX RY RZ VELRE Velocities relative to FRA jacket X Y Z RX RY RZ ACCRE Accelerations relative to FRA jacket X Y Z RX RY RZ POSRP Position rotation relative to RPN barge X Y Z RX RY RZ VELRP Velocities relative to RPN barge X Y Z RX RY RZ ACCRP Accelerations relative to RPN barge X Y Z RX RY RZ HYDST Hydrostatic forces X Y Z RX RY RZ MORDR Morrison drag forces X Y Z RX RY RZ SLAMM Slamming forces X Y Z RX RY RZ GYROS Gyroscopic forces X Y Z RX RY RZ ADMAM Added mass momentum X Y Z RX RY RZ LDAMP Linear damping X Y Z RX RY RZ DIFFR Diffraction forces X Y Z RX RY RZ FRKRY Froude Krylov forces X Y Z RX RY RZ GRAVI Gravitational forces X Y Z RX RY RZ WINER Winch track forces X Y Z RX RY RZ TOTML Total mooring line forces X Y Z RX RY RZ TOTBA Total ballast X Y Z RX RY RZ RPREA Rocker pin reaction X Y Z RX RY RZ TRACK Winch track forces X Y Z RX RY RZ SESAM Program version 8 1 10 June 2010 Installjac 67 ERROR Error per timestep X Y Z RX RY RZ TOTFO Total force X Y Z RX RY RZ SBCLR Clearance Z WAHGT Wave height at origin X Y Z RX RY RZ HRHAX Hinge reactions hinge axis X Y Z RX RY RZ HRFRA Hinge reactions FRA X Y Z RX RY RZ LBFOR Lead barge forces RPA X Y Z RX RY RZ RPPWB Rocker position with respect to barge X Y Z RX RY RZ RPVWB Rocker velocity with respect to barge X Y Z RX RY RZ RPAWB Rocker acceleration with respect to barge
238. terial group number is omitted by the user a material the density of seawater will be used by default The density on the MATE card should be approximately that of seawater If it is greater than 10 of the density of seawater a warning will be issued Geometric Group I5 Enter the geometry number for this element Geometric group numbers are defined on GEOM cards Apply node names for nodes that are read from the FEM file model when the node name concept is applied A node name is defined by the XYZFEM card and must exist before it is applied If a node name is not found an echo of the name is printed The present card may contain a mix of user defined node numbers and node names of the FEM file model When the card name has the prefix XYZ i e XYZCTRL a message is printed to the Installjac MLG file if the node name is not found node name not defined or user node number applied No message is printed when the word CTRL is applied Installjac SESAM 124 10 June 2010 Program version 8 1 10 16 Entrapped Air Card CTRL XYZCTRL This card is optional and valid for FLOOD only Use this card to specify a control flooded member by controlling its internal air pressure rather than giving its percentage of flooded volume While flooding if the free surface cuts both the end discs the pro gram will abort Columns Entry Description and Variable Name Format 7 10 4 10 CTRL XYZCTRL A4 A7 12 15 16 20 21 25 26 30 36 4
239. tering Node Coordinates NODE cards contain the X Y and Z coordinates of all the nodes for all three struc tures The coordinates are in the FRA axis system for the structures The structures themselves do not have to be modelled in any particular position relative to each other The program will position the structures during the LAUNCH Position ing run For example they might be defined as in Figure 3 5 Then again they could overlap as in Figure 3 6 Note Remember to include nodes for the launch tracks If you are working with an articulated barge include nodes for the barge hinge also Figure 3 5 Initial Structure Positions SESAM Installjac Program version 8 1 10 June 2010 23 Figure 3 6 Overlapping Initial Structure Positions Remember at this point you are only assigning node numbers to points in space You will connect the points with different shaped elements by referring to the node numbers on STRE and NSE cards Figure 3 7 Nodes in Space A Node Coordinate card has five input fields You can define only one node per card For each node you enter its number and its X Y and Z coordinates NODE 435 36 03 39 218 26 0 Installjac SESAM 24 10 June 2010 Program version 8 1 The card above would place node number 435 at X 36 03 Y 39 218 and Z 26 00 3 5 2 2 Obviously the nodes for this jacket and barge are being defined in a FRA coordinate space that goes from 0 to 1 in all three directions
240. the Installjac execution and for restart runs The same conversion and saving takes place when XYZFEM cards are placed in the Installjac input files However the core part of Installjac does not relate to these cards and the cards will thus appear as comment cards in the edited input file that is applied in the actual Installjac execution i e User input file XYZFEM Joint_692 LA Sp ABRI AO 96 9867 Edit input file read by the core part of Installjac XYZFEM Joint_692 Lao Sy 4 96 9867 Element Name Definition Element names are defined by XYZELE cards A XYZELE card contains the card name a user specified element name and two node names to identify the element XYZELE Ele _70 Joint_48 Joint_34 Only two node beam elements can be handled The node names must have been defined when the XYZELE card is treated The element name is connected to an ele ment number by comparing the node numbers of the converted node names with node element connectivities of the T FEM file model If no mach is found the element name is regarded as erroneous and a message is printed to the Installjac mlg file If a same name appears more than once on the XYZELE cards the second and later Installjac SESAM 34 3 6 4 10 June 2010 Program version 8 1 definitions are disregarded and information is printed to Installjac mlg file The number of XYXELE cards can not exceed the number of elements of the FEM file model XYZELE cards m
241. the density of sea water a warning will be issued 41 45 Geometric Group I5 Enter the geometry group number Geometry group num bers are defined on GEOM cards 46 50 Initial Percentage of Volume Flooded IS Enter the percentage of the element that will be initially flooded At a time up to and equal to the start flood time the per centage flooded is specified by this value 51 55 Final Percentage of Volume Flooded IS Enter the percentage of the element that will be finally flooded The percentage flooded is maintained until the end of the simulation if the simulation time exceeds the finish flood time Note In the special case when this value or the start and finish flood times are all omitted or zero the final per centage flooded will default to the initial percentage of volume flooded i e no change in initial volume flooded throughout the simulation 57 60 Time Flowrate Indicator A4 Enter TIME if you want to specify the final flood time in columns 71 80 Enter RATE if you want to enter the flood rate in columns 71 80 61 70 Starting Time for Percentage Volume Change F10 0 Enter the start flood time i e the time that the element percentage flooded starts to change At a time up to and equal to the initial flood time the percentage flooded is specified by the percentage value in columns 46 50 The default is 0 0 seconds SESAM Installjac Program version 8 1 10 June 2010 115 71 80 Finish Time for P
242. those elements indicated would be written Installjac SESAM 214 10 June 2010 Program version 8 1 If any other member uses this field the loads on this member will not be written Apply node names for nodes that are read from the FEM file model when the node name concept is applied A node name is defined by the XYZFEM card and must exist before it is applied If a node name is not found an echo of the name is printed The present card may contain a mix of user defined node numbers and node names of the FEM file model When the card name has the prefix XYZ i e XYZSTRE a message is printed to the Installjac MLG file if the node name is not found node name not defined or user node number applied No message is printed when the word STRE is applied SESAM Installjac Program version 8 1 10 June 2010 215 10 71 Time Parameters Card TIME This card is required for LAUNCH Use this card to set the Columns 7 10 11 15 16 20 31 40 41 50 Total number of increments Time increment Starting time Entry Description and Variable Name Format TIME A4 Enter the word TIME Last Record Number I5 This value controls the last record number of the time incre ment in this analysis Starting record number for time increments in this analysis Start of Incrementation I5 This value controls the record number from which time incre mentation starts The record number of increment n is the Start of Incrementation
243. tion Loads for Rockers B or G F10 0 Enter the normal reaction loads for rockers B or G Used only if that rocker is defined with an MRP card dimen sionless 31 40 Normal Reaction Loads for Rockers C or H F10 0 Enter the normal reaction loads for rockers C or H Used only if that rocker is defined with an MRP card dimen sionless 41 50 Normal Reaction Loads for Rockers D or I F10 0 Enter the normal reaction loads for rockers D or I Used only if that rocker is defined with an MRP card dimen sionless 51 60 Normal Reaction Loads for Rockers E or J F10 0 Enter the normal reaction loads for rockers E or J Used only if that rocker is defined with an MRP card dimen sionless SESAM Installjac Program version 8 1 10 June 2010 201 10 63 Restraint Card RELF This card is valid for LAUNCH only It is required during a launch run before jacket separation Use this card to define the restraint moment and force These values govern the opening of the main rocker arm or the lifting of the jacket away from the track sys tem You can use them to make a clean transition for sensitive launch problems If the card is omitted the defaults are Force normal to rocker 1000 Moment 100 000 Columns Entry Description and Variable Name Format 7 10 RELF A4 Enter the word RELF 11 20 Force Normal to Rocker F10 0 Enter the force restraining the jacket from lifting off the rocker pounds force English or Newtons Metric 2
244. tric The density units must be consistent with the units for acceleration of gravity ACCG card columns 11 20 slugs per cubic foot Eng lish or kilograms per cubic meter Metric see JOB card Current Flow Speed Along X Axis FRA Enter the current speed along the X Axis FRA at sea level This field is not used by FLOAT The default is 0 0 feet second or meters second See the JOB card Current Flow Speed along Y Axis FRA Enter the current speed along the Y Axis FRA at sea level This field is not used by FLOAT The default is 0 0 feet second or meters second See the JOB card Format A4 F10 0 F10 0 F10 0 F10 0 Note The flow speed entries columns 31 40 and 41 50 can be overridden by CPRF and CDRN cards at any stage of the processing SESAM Installjac Program version 8 1 10 June 2010 143 10 30 Applied Forces Cards FORC XYZFORC This card is optional Use this card to apply a crane hook force of constant magnitude to a structure Columns 7 10 4 10 15 16 20 21 25 26 30 31 40 41 50 Entry Description and Variable Name Format FORC XYZFORC A4 A7 Enter the word FORC or XYZFORC Structure Identifier Il Enter the number 1 2 or 3 of the structure that you want to set the starting positions for Structure Node Number Node Name I5 A16 Enter the node number node name of the place where the load is to be applied For example this node identi fies the pl
245. tructure was coded properly 7 3 Getting Ready Before you begin this task you should e Understand the axis systems used by FLOAT e Design your structure e Prepare a stress analysis of your jacket using Prefem and Sestra e Convert your jacket FEM file into an a format suitable for Installjac 7 4 Task Outline This outline assumes that you are building your structure from scratch During the task you will e Enter card data that defines basic task parameters the structure and global parameters Refer to Table 7 1 When you execute the program it 1 Calculates the mass center of mass and mass moments of inertia for each structure 2 Creates a local axis system LSA for each structure which rotates with the Installjac SESAM 76 10 June 2010 Program version 8 1 jacket 3 Prints the Properties of Elements report 4 Creates a RESTART 1 file The RESTART 1 file contains the structure data that will be read when you run other FLOAT tasks or when you plot the structure After this run you should e Check the results using the reports generated by the program 7 5 Entering FLOAT Data Run Cards The table below lists all of the cards that the program uses during a FLOAT Data run The table is followed by instructions for completing the cards Card Description Status JOB Job Card Required TITLE Title Cards Optional ne Comment Cards Optional OPTIONS Options Cards Require
246. ts you reproduce the problems associated with the Reynolds number dependence of the drag coefficient Note This option applies the drag coefficient specified in figure reference to all TUBE elements and is not modified by the DRG factor specified Columns Entry Description and Variable Name Format 7 10 SC1 A4 Enter SC1 11 20 Reynolds Number Scale Factor F10 0 21 30 Enter the Reynolds Number Scale Factor The default is 1 0 and the TUBE drag coefficient will include the effects of Reynolds Number when velocities are small Kinematic Viscosity F10 0 Enter the kinematic viscosity dynamic viscosity fluid density The default is 1 57 x 10 x GEE 9 81 feet second English or meters second Metric SESAM Installjac Program version 8 1 10 June 2010 207 10 67 Slam Multiplication Factor Cards SLMx These cards are required Use them to modify the slam of a structure The program applies slam to each hydrodynamic component of the structure If these cards are not entered the Slam Multiplication Factor defaults to 0 0 Columns Entry Description and Variable Name Format 7 10 SLMx A4 Enter the word SLMx x Structure Identifier below Structure Identifier Enter for x the number 1 2 or 3 SLM1 SLM2 or SLM3 to identify the structure that you want to set the starting positions for 11 20 Slam Modification Factor F10 0 The slam of the structure will be multiplied by the num ber you enter here Inst
247. ture Identifier Enter the number 1 2 or 3 for x VEL1 VEL2 or VEL3 to identify the structure that you want to set the starting velocities for On an articulated barge if a conflict of boundary conditions exists the velocity of the lead barge will be altered to retain the zero boundary condition rela tive velocity at the hinge X Translation Velocity F10 0 Enter the translation velocity of the structure in the X direction The default is 0 0 feet second or meters sec ond See the JOB card Y Translation Velocity F10 0 Enter the translation velocity of the structure in the Y direction during an analysis of more than one structure after separation Leave this field blank when analyzing more than one structure before separation The default is 0 0 feet second or meters second See the JOB card Z Translation Velocity F10 0 Enter the translation velocity of the structure in the Z direction during an analysis of more than one structure after separation Leave this field blank when analyzing more than one structure before separation The default is 0 0 feet second or meters second See the JOB card X Rotation Velocity F10 0 Enter the rotation velocity of the structure in the X direc tion during an analysis of more than one structure after separation Leave this field blank when analyzing more than one structure before separation The default is 0 0 feet second or meters second See the JOB card Y Rotation Ve
248. two and a maximum of 10 RAXS cards may be input to describe the rocker arm cross sec tion along its length The default is that the hydrostatic drag and added mass forces on the rocker arm will be zero implying that the RAMS and RAXS cards are not used see sect 4 5 5 for further explanation Columns Entry Description and Variable Name 7 10 11 20 21 30 31 40 41 50 51 60 61 70 RAXS Enter the word RAXS Distance from the Rocker Pin Enter a distance from the rocker pint to the point at which the cross sectional area is given in columns 21 30 This distance is positive from the trailing to the leading ends of the rocker arm feet English or meters Met ric Note The first distance given is always negative On each RAXS card the distance must be in ascending order Mass Cross Sectional Area Enter the mass cross sectional area at the distance speci fied in columns 11 20 square feet English or square meters Metric Hydrostatic Displacement Cross Sectional Area Enter the hydrostatic displacement cross sectional area at the distance specified 1 columns 11 20 square feet English or square meters Metric Height of the Cross Section Enter the height of the cross section at the distance speci fied in columns 11 20 This is used to calculate the drag and added mass forces feet English or meters Met ric Width of the Cross Section Enter the width of the cross section at the
249. uces the Mass and Displaced Volume When Fully Submerged report for each structure 3 8 1 Mass and Displaced Volume when Fully Submerged Report 1 Verify that the program used all of the elements for the structures by checking the Number of Elements column 2 Make sure that the buoyancy of each structure is greater than its weight 3 Make sure that the X and Y positions of the centers of gravity and buoyancy of the barge are roughly equal The information for performing the three points above are found in the text output files log is the default extension if no output filename is specified 1 Note there is a bug in Manager version 5 2 01 specifying the output file name in the Output file field does not have any effect Specify instead output lt output gt log in the Extra command line arguments field as shown in the figure SESAM Installjac Program version 8 1 10 June 2010 39 3 9 Visualizing the Structures and Animations If the option VTFF is specified as on the OPTIONS card then the jacket and barge structures can be visualized in SESAM Xtract Animations of the displacements can also be performed in Xtract Installjac SESAM 40 10 June 2010 Program version 8 1 4 Positioning the Jacket and Barge Structures Before a Launch 4 1 Why The second task in launching a jacket is to position the jacket and barge structures This task places the jacket on the barge s and lets them move until they reach an equilib riu
250. ure Identifier Enter the numberl 2 or 3 for x POS 1 POS2 or POS3 to identify the structure that you want Note You must enter cards for each structure that you have defined X Coordinate Enter the X position of the center of gravity of the struc ture EXCEPT when the jacket is in contact with the barge in which case e for structure 1 jacket enter the RELATIVE X posi tion of the jacket track with respect to the barge track i e how far the jacket has slid along the tracks in the direction of the launch e for structure 2 trailing or only Barge enter the X coordinate of the center of the rocker pin e position of center of gravity for structure 3 for articu lated barge case The default is 0 0 feet or meters Y Coordinate FRA Enter the Y position of the center of gravity of the struc ture EXCEPT when the jacket is in contact with the barge in which case e for structure 1 jacket enter the RELATIVE Y posi tion of the center of the jacket track with respect to the barge track THIS VALUE SHOULD ONLY BE ENTERED IN THE UNLIKELY EVENT THAT YOU ARE RESTARTING WITH THE JACKET ROLLED ONTO ONE TRACK e for structure 2 trailing or only Barge enter the Y coordinate of the center of the rocker pin Note Leave this field blank when using FLOAT Format A4 F10 0 F10 0 Installjac SESAM 188 10 June 2010 Program version 8 1 The default is 0 0 feet or meters 31 40 Z Coordinate FRA F10 0 E
251. ut a mud plate on the bottom of the jacket or to add ballast tanks Some people use these cards to define ele ments that outline the jacket Then they display the outline using these elements instead of the detailed structure NSE1 TUBE 2 201 321 3 4 NSE1 TUBE 3 301 221 3 4 NSE TRIA 4 101 111 102 6 The first two NSE cards above would create a X brace across one side of a bay The last card would put a Lamina triangular place of zero thickness between three of the legs at the bottom of the bay as shown in Figure 8 Material Properties You must assign different material group numbers to different combinations of material properties Not all elements have material properties and therefore do not require SESAM Installjac Program version 8 1 10 June 2010 79 MATE cards Material properties are defined on MATE cards 3MATE 1 9125 0 3MATE 2 9125 0 3MATE 3 8000 0 3MATE 8 1025 0 7 5 5 Geometric Properties The geometric properties describe such things are the diameter thickness length added mass coefficient and viscous drag coefficient Each element requires different inputs Refer to the GEOM card in Describing Installjac Cards A sample set of GEOM cards might look like this GEOM TUBE 949 3 5 3 5E 02 0 0 0 0 0 0 GEOM 949 1 0 0 7 GEOM PMAS 999 5 08E9 6 558E7 4 485E8 4 937E10 3 298E6 5 3666E10 7 5 6 G
252. ute the trajectory for struc ture 1 PRFO Tells the program to print the resultant forces at the center of mass of the defined structures for each time step NODL Generates the least amount of printed output JOB LAUNCH TITLE EXAMPLE LAUNCH RUN OPTIONS STR1 PRFO NODL END Coding the RESTART Card You can leave the RESTART card the same as it was for the LAUNCH 2 run This tells the program to get the last trajectory for structure 1 from the RESTART file and update the file with new structure 1 data only At the end of this run the RESTART file will contain data for structure 1 only Entering Time Integration Parameters The Time Integration Parameters card controls how long the program will run when trying to launch the jacket The card has these inputs Last Increment This value controls the record number of the last time step the program will cal culate in the launch position analysis Typically you want to set this large enough to let the jacket reach a stable state ready for upending One hundred 100 increments is a good place to start Start of Incrementation This value controls the record number from which time incrementation starts The record number of step n is the Start of Incrementation value plus n If omit ted the start level is 0 Time Increment This value controls the time that elapses between position calculations A sec ond 1 0 sec is usually adequate for a standard jacket You migh
253. utually exclusive Use this card to free the hinge of an articulated barge This card is not generally used and under normal circumstances should be omitted If you do not enter this card the hinge is free Columns Entry Description and Variable Name Format 7 10 FREE A4 Enter the word FREE No other entry is required on this card Installjac SESAM 146 10 June 2010 Program version 8 1 10 32 Friction Card FRIC This card is valid for LAUNCH and is used only during a launch run before jacket sep aration Use this card to specify the dynamic and static friction coefficients The friction force retards the relative motion between the jacket and the barge launch tracks The program applies the static friction coefficient when the relative motion along the tracks is zero It then reduces the friction force to the dynamic value once rel ative motion occurs Columns Entry Description and Variable Name Format 7 10 FRIC A4 Enter the word FRIC 11 20 Dynamic Coefficient F10 0 Enter the dynamic friction coefficient This number should be smaller than the static friction coefficient The default is 0 0 21 30 Static Coefficient F10 0 Enter the static friction coefficient This number should be larger than the dynamic friction coefficient The default is 0 0 SESAM Program version 8 1 10 33 10 June 2010 Geometric Properties Cards GEOM Installjac 147 These cards are required if you are not using a RESTART ca
254. with the Ist hinge node on the trailing barge columns 21 25 2nd Hinge Node on Leading Barge 15 A16 Enter the node number node name that corresponds to the connection on the leading barge This will connect with the 2nd hinge node on the trailing barge columns 26 30 Apply node names for nodes that are read from the FEM file model when the node name concept is applied A node name is defined by the XYZFEM card and must exist before it is applied If a node name is not found an echo of the name is printed The present card may contain a mix of user defined node numbers and node names of the FEM file model When the card name has the prefix XYZ i e XYZAXIS a message is printed to the Installjac MLG file if the node name is not found node name not defined or user node number applied No message is printed when the word AXIS is applied SESAM Program version 8 1 10 June 2010 109 10 8 Installjac Barge Track Cards BLTx XYZBLTx The Barge Track Cards BLTx are required for a positioning or launch run of the LAUNCH option or FLOAT combination runs These cards define the launch tracks on the barges and are used by LAUNCH and by FLOAT when the Barge Jacket is com bined Both the jacket and the barge have two tracks figure reference Jacket tracks are defined with the JLT cards Each track is defined by two nodes The following constraints apply to the tracks 1 2 6 The track nodes for a structure must lie
255. y 5T 3y 3931 Such information is not printed when the XYZ prefix is not applied Execution Modes Application of Installjac consists of several execution modes Positioning of the jacket on the barge Launching of the jacket Analyzing the jacket after separation Upending of the jacket In the positioning run the FEM file model data is converted to Installjac input by apply ing the CONVERT option on the JOB command card There are two basic input files a convert run 1 A T FEM file with the jacket model 2 A file comprising other Installjac commands OINP A convert run then has the following steps 1 The T FEM jacket model is converted to Installjac model commands 2 Node and element names in the OINP file are converted to members 3 The jacket model commands and the OINP commands are written to a new Installjac input file AINP The converted data are written to a final input file which is read the core part of Install jac The final input file may be named by the user with the AINP FEM file conversion card During the conversion node name and element name files are translated to num bers Node and element names may be defined in separate files These files are refer ring to by the NINP and MINP FEM file conversion cards Name and numbering relations of nodes and elements are saved for later use in the exe cution process All relevant data are written to the lookup res file for use in restart exe cutions At the en

Installjac

Contents

Download Pdf Manuals

Related Search

Related Contents