Home

DeepC User Manual

1. DeepC SESAM 4 92 01 DEC 2010 Program version 4 5 The artificial stiffness dialog looks like Support Vessel Vessel Data Vessel Mass Artificial Stifness Hydrostatic Restoring Linear Currer_4 Artificial stifness coefficients 1E6 Nim N m Rall ON m Nm 1E6 Nim N m Pitch 0N Nm ON m N m Yaw 1 3 Mm Nm Cancel Artificial stiffness is often applied to vessels to improve the stability of the static solution If the static solu tion converges the artificial stiffness shall not contribute to the final static solution meaning that artificial stiffness is treated differently from other stiffness contributions The following components can be speci fied all stiffnesses are given in global coordinate system e Surge Sway Heave Additional translational stiffness in global X Y Z direction e Roll Pitch Yaw Additional rotational stiffness about global X Y Z axis SESAM Program version 4 5 01 DEC 2010 4 15 7 Hydrostatic Restoring supply supply_t E Ss semi E supp Vessel Data Vessel Mass Artificial Stiffness Hydrostatic Restoring Linear Current Folder Properties Quadratic Current Save HTML Report Wind Force Calculate Retardation Function Linear Damping Read Vessel Data Read Vessel Geometry Quadratic Damping Fairleads RAO Functions Viscous Force Specified Force Quadratic Transfer Func
2. aa Select Result Coordinate Arc Length ene Select Result Component X Coordinate pu J Line Time Series Y Coordinate Range Curves a E Spectra 2 Coordinate Vessel Time Series E E Fatigue Results H E Static Results Specify that the line plots shall be drawn as a function of distance along the line Arc Length or X Y Z coordinate of the line in stress free configuration 4 24 12 Select Result Component a a Ana x5_19x5 Moment B Fatigue Range Max Min E Results Range Mean Stdv E O ao Results Range Statistics E Distributions Select Result Coordinate Select Result 7 ST Axial Force 3 Pa Time Series sigs FT E Curves Total Bending Moment z Spectra Bending Moment My Vessel Time Series Bending Moment Mz Total Shear Force Shear Force Sy Shear Force Sz ea Structure Ey Structure Properties Total Curvature y Utilities Curvature Cy E Vessels Curvature Cz X Displacements Y Displacements z Displacements Select the type of result that you want to plot curves for DeepC SESAM 4 194 01 DEC 2010 Program version 4 5 4 24 13 Plot Fatigue Life et Fatigue_Inner_pipe line 2DPlot riser3 til Fatique outer pipe line 2DPlot riser 1 EAS thrice 3 Plot fatigue life h whet esa Plot fatigue life along line at Graph Window Dept 022 10 Date 08 Dec 2004 0800132 Fatigue Life Fatigue Life Years a r ran 50
3. Pointia51 3539064 m 404 Point 0 m 10 m 13 m 1150 m 1150 m DO m 20m _ C ris Point 861 3539364 m 404 Point 0 m 10 m 13 m 4150 3 1150 m 7 ES E Point 0 m 10 m 13 m Point 0 m 10 m 13 m Stress free coordinates represent the initial position of lines and stress joints in the static analysis A stress free configuration is one chosen position out of an infinite number of possibilities for the line end coordi nates The dialog has the following fields e Line name Name of line or stress joint e End 1 2 Stress free coordinates of the two end points of the line stress joint e Length Information field showing the sum of the segment stress free lengths on the line stress joint Note that if the Initially stressed segments option in the line dialog Section 4 17 1 is used then the sum of the initially stressed segments lengths 1s shown e Distance Information field automatically updated by the program showing the distance between the two end points specified This distance should equal Length e Calc End 1 2 When the Calculate or Calculate Connected button is pressed stressfree coordinates will be calculated for end 1 of a line if Calc End 1 1s pressed and end 2 if Calc End 2 is pressed Usu ally both Calc End 1 and Calc End 2 should be selected for a line By pressing the heading row in this column t
4. SESAM DeepC Program version 4 5 01 DEC 2010 4 159 The execute multiple analysis dialog looks like MA ayas Control gt Scatter discretization tb ScatterDiscretizatio M Runin background e o a Joumal esport and execute commands C Single analysis E pS Maxinium Y Number of parallel analyses Y Oe Generate Input Files Input Mo Static Dynamic InputRe Simo Sta Riflex St SimoDy Riflex Dy View C vew C Vew C View Scan All Result Files Fun Analysis Gg When the workspace contains many analysis that shall be executed in batch it is a good idea to use the exe cute multiple analysis dialog It contains the following fields Scatter discretization Select this option if you want to execute analysis connected to a scatter discretiza tion All analysis Select this option if you want to execute all the analysis in the project Single analysis Select this option to execute a single analysis only Run in background If this option is selected the DOS windows for Simo and Riflex will initially be minimized Journal export and execute commands Specify whether export and execution commands shall be added to the scripting file of the workspace Automatically regenerate input files If this option is selected all Riflex Simo input files that are not locked will be regenerated prior to running Riflex Simo Number of parallel analyses Here you deci
5. Save HTML Report The section pipe dialog looks like L2 Staichine Properties Section Axi symmetric Section Axi symmetric Non Linear Mesh Density on Segment Pipe Linear Isotropic Materia 4 f New Edit existing Section M Allow edit Thickness Diameter Diameter 0 3 Im Thickness 20mm m Outer contact diameter Yj Im k Inner contact diameter Vy Im Pipe cross sections define strength properties of segments They take the following parameters e Diameter External pipe diameter Also used to calculate buoyancy and wave forces e Thickness Wall thickness of pipe e Outer contact diameter Outer contact diameter for pipe in pipe contact If not specified the cross sec tion outer diameter will be employed SESAM DeepC Program version 4 5 01 DEC 2010 4 69 e Inner contact diameter Inner contact diameter for pipe in pipe contact If not specified the cross section inner diameter will be employed Segments applying pipe cross sections must also apply a material 4 13 11 Section End Cone eq Structure Properties Load Interfaces i Materials Mesh Densities New Section Axi Symmetric f a Utilities New Section Axi Symmetric Non Linear ER g Vessels New Section Pipe New Section Cone Fields Folder Properties save HTML Report The section end cone dialog looks like t structure Properties Extemal Wrapping Marine Growth Co
6. Support Vessel Wind Force Calculate Retardation Function Linear Damping Quadratic Damping 4 gt Linear Damping Coefficients 4 Cancel Linear damping coefficients are used to specify additional damping on the vessel proportional to the vessel velocity They are defined by DeepC SESAM 4 102 01 DEC 2010 Program version 4 5 e Damping C1 C6 The components of the 6x6 damping matrix 4 15 13 Quadratic Damping Ai Vessels ty semi Delete nn Rename Vessel Data Vessel Mass Artificial Stiffness Hydrostatic Restoring Fields Linear Current Folder Properties Quadratic Current Save HTML Report Wind Force Calculate Retardation Function Linear Damping Quadratic Damping Fairleads RAO Functions Viscous Force Read Vessel Data Read Vessel Geometry Specified Force Quadratic Transfer Functions SESAM DeepC Program version 4 5 01 DEC 2010 4 103 The quadratic damping dialog looks like Support Vessel Quadratic Damping Coefficients Y baron C1 Damping C2 Damong C3 Damping c Damping C5 Damping ce AAE 2 omes zmz ORNS 082 30 KNS 2m2 O kNs Zim 2 0 KN S220 KN s 2 0 KZ 0 MaS 5 OkN 6 n 6 OKN s 2 m OKN s 2 m 0 KN s 2 m 0 kKN s 2 m 0 KN s 2 m n 6 OKN s 2 m OKN s 2 m 0 KN s 2 m 0 kKN s 2 m 0 KN s 2 m s 2m OKN s 24 m OKN s 2 m 0 KN s 2 m 0 kN 2 2 m Cancel Quadratic damping coefficients are used to
7. Information Copy Paste SESAM DeepC Program version 4 5 01 DEC 2010 4 147 In the dynamic analysis options dialog the first and fourth tab will be depending on whether the analysis is an irregular or regular wave analysis The first tab is used to specify time stepping data and some general parameters for the dynamic analysis For irregular analyses the first tab in the dialog looks like i Dynamic Analysis Options Ana7x511x5 Identifier DYN Description rao dynamic analysis Time domain parameters Simulation length Time step Time step wave senes Ramp duration Wave kinematics on lines Include wave forces on Lines Start time in wave time series Os El Cancel The parameters are e Identifier Free text e Description Free text e Simulation length Duration of time domain simulation e Time step Time step in time domain simulation e Time step wave series Read only information field Time step wave series should be an integer multiple of time step time step n time step wave series where n is an integer e Ramp duration Duration of start up procedure Dynamic forces will vary from 0 and up to real value during the ramp duration e Wave kinematics on lines Specify whether wave forces shall be included on lines or not More infor mation is specified on the Irregular Wave Procedure tab clude wave forces on Lines No wave forces on Lines DeepC SESAM 4 148 01 DEC 2010 Program
8. The selection here should not conflict with the load types selection e No Strips Number of strips subelements on an element Wave forces for each strip are calculated based on the wave particle kinematics at the centre of the strips e X Y Z End 1 X Y Z coordinate of first element end e X Y Z End 2 X Y Z coordinate of second element end e X Y Z Ref The x axis of the element is going from end 1 to end 2 of element To define the remaining two axis Y and Z the user must give a point in the XY plane This point should not lie along the ele ment axis e C2drag X Y Z Quadratic drag coefficient in element local X Y Z direction Quadratic drag force on a strip sub element is calculated as FEC q V ret AL Y yg Eg Quadratic drag coefficient matrix AL Length of sub element Vea 7 Relative velocity vector between wave particle and sub element e Cldrag X Y Z Linear drag coefficient in element local X Y Z direction Linear drag force on a strip sub element is calculated as F C F 5 AL C Linear drag coefficient matrix AL Length of sub element Vee 7 Relative velocity vector between wave particle and sub element e Add Mass X Y Z Added mass coefficient in element local X Y Z direction SESAM DeepC Program version 4 5 01 DEC 2010 4 113 4 15 18 Specified Force Re supply_boat_InfiniteAddedMass Infinite E Ts semi supply boat LinCur Linear E 3 supi LinearD BodyMa Potentiz De
9. The vessel data dialog looks like t Support Vessel Vessel Mass Artificial Stiffness Hydrostatic Restoring Linear Cure 4 gt Initial position and onentation Position in global co ordinates X rotation Odeg deg Point 0 m 60 m 0 m E 0 deo dea Z rotation Udeg deg Geometry Symmetry No symmetry Vessel data Characteristic length 80 55999756 m Im Wetted surface 508 6013184m 2 m 2 Water plane area Om m 2 Submerged volume 2354775391 m 3 m 3 SESAM DeepC Program version 4 5 01 DEC 2010 4 89 From the vessel data dialog the vessel initial position and orientation may be edited In addition vessel symmetry may be specified At the bottom of the dialog some vessel data are displayed for information pur poses The data in the dialog has the following interpretation e Position in global coordinates Specify location in 3D space of vessel origin The vessel geometry will be translated according to these coordinates and the origin of the vessel local coordinate system 1s defined at this position e X Y Z rotation Specify Euler rotations about the X Y Z axes in a local coordinate system The origin is at the vessel initial position and initially the axes are parallel to the axes of the global coordinate system Rotations about the Z axis is performed first then about the intermediate Y axis and at last about the intermediate X axis e Symmetry Specify symmetry of vessel geometry e Characteristi
10. 3 ws_ip Mame Description Environment 3 Analysis Anar 115 Nonlinear Analysis CB7x5_11 5 Capacity OF Ana e5_1925 Nonlinear Analysis CE7x5_19x5 H Environment OF Anal 7251145 Nonlinear Analysis CB17x5_11 5 Results OF Ana17x5 1945 Nonlinear Analysis CB17x5_19 5 3 Structure W AnaReg_1 405 DO Nonlinear Analisis ARegCond_14s5_ D0 3 Structure Properties Se AnaReg_14 10_D0 Nonlinear Analysis RegCond_14 10_D0 Utilities Y AnaReg_ 14 10 045 Nonlinear Analysis RegCond_14x10_D45 Vessels 6 AnaReg_ 14 10 090 Nonlinear Analysis RegCond_14x10_D45 semi HE AmaReg_14410_D135 Nonlinear Analisis Reglond 14 10 045 DeepC SESAM 4 132 01 DEC 2010 Program version 4 5 4 19 Analysis Data Types Analysis objects contain parameters related to how calculations shall be performed what results shall be stored algorithms etc Defining an analysis involves 4 steps 1 Define the analysis in the new analysis dialog Section 4 19 1 2 Define response storage parameters Section 4 19 2 3 Define static analysis parameters Section 4 19 3 4 Define dynamic analysis parameters Section 4 19 4 4 19 1 New Analysis las H Em New Analysis be E Fal Multiple Analysis t O RE Generate Multiple Input Files t L gt T Execute Multiple Analysis Str 3 Util Paste Eaj Ves Fields Folder Properties Save HTML Report The new analysis dialog looks like t x DC New Editesisting Ana7x5_11 5 C Regular time condition
11. 4 80 01 DEC 2010 Program version 4 5 e Logl0N Logl0 Number of cycles at which curve breakpoint occurs By pressing the Fill with predefined button the fields in the dialog will be filled based on the selected pre defined curve and whether or not Tubular joint is selected 4 13 19 Section Stress Parameters Structure Properties New Stress Concentration Factor New SN curve New Section Stress denia Fields Save HTML Report Vessels The section stress parameters dialog looks like 4 F BE New Editexisting StressProperties IY Allow edit Moment of inertia Y 0 00020435 m mA Crossectional area 0 0094 m 2 m2 Diameter W 0 3m m Thickness Gz 0 02m m Stress cross sectional parameters are used to specify the stress properties of segments in fatigue calculations They use the following input e Moment of inertia Defined as the integral y 2 dA over the cross section Assumed equal about local y and z axis Used to calculate stresses from bending moment together with the diameter e Cross sectional area Area used to calculate axial stresses based on axial force SESAM DeepC Program version 4 5 01 DEC 2010 4 81 e Diameter Section diameter that is used when extracting bending stresses from curvature The radial position for evaluation of stress is specified by the stress concentration factor property Section 4 13 17 e Thickness Wall thickness Used to calculate
12. 4 95 Linear current coefficients are used to calculate current forces on the vessel that are proportional to the cur rent velocity The following parameters must be specified e Symmetry Specify whether the current coefficients shall be mirrored for symmetric current directions With double symmetry specified current coefficients must be specified for headings ranging from 0 to and including 90 deg With single symmetry coefficients must be specified for headings ranging from 0 to and including 180 deg With no symmetry coefficients must be specified for headings ranging from 0 to and including 360 deg coefficients at 360 deg must equal those at 0 deg e Heading Current direction to which current coefficients apply Angle counterclockwise from vessel local X axis e Current C1 C6 Give the current coefficients corresponding to force in the 6 degrees of freedom DeepC 4 96 4 15 9 Quadratic Current 0 52 Vessels E semi The quadratic current dialog looks like t Suppont Vessel Delete Rename Read Vessel Data Read Vessel Geometry Fields Linear Current Folder Properties Quadratic Current save HTML Report Wind Force A SESAM 01 DEC 2010 Program version 4 5 Vessel Data Vessel Mass Artificial Stiffness Hydrostatic Restoring Calculate Retardation Function Linear Damping Quadratic Damping Fairleads RAO Fu
13. Dynamic analysis Options Export View Static Configurations Response Post Processing Read All Results Read Static Results Read Dynamic Results Read Vessel Results Information Paste e Right click the parent folder and choose paste New Analysis Multiple Analysis Generate Multiple Input Files Execute Multiple Analysis Fields and Folder Properties Save HTML Report DeepC SESAM 2 14 01 DEC 2010 Program version 4 5 2 12 Copy Transform On lines risers mooring lines etc and guiding geometry one may perform the copy transform operation The dialog is reached from the Edit gt Copy with transfrom menu or the toolbar button cn Five different translation methods are available Point in miror plane P 1 A Miror plane nomal vector RA Mirrored point Normal wector Preview Cancel The dialog contains figures and descriptions of the different transformation types One should note that if the length of a line is changed in the copy operation the copied segment definitions may not make sense Copy by translation and copy by rotation gives the option of performing multiple copy operations in one go Rotate Mirror 3 Point Position General transftomation Translation vector Wector3d 200 m 0 m 10 m Copy f time s Preview Cancel When multiple copies are made in one go the logic works such that the n th copy becomes t
14. Program version 4 5 01 DEC 2010 2 31 Resize columns widths by positioning the mouse cursor over a column division line and pressing LMB Direction deg 1 Jom Odeg 0 945 mis 2 79 85m D deg 0 945 mis 3 ssm gt Jodeg 0 122 mis 4 639 13 m i 0 122 mis Velocity m2 2 21 Save Print Graphics On the file menu one finds the Print Graphics and Save Graphics As commands Edit View Insert Tools Help C New Workspace Ctrl h E Open Workspace Cctrl 0 m Save Workspace ctrl 5 Close Workspace Print Graphics K Read Command File Recent Command Files d Recent Workspaces d save report Save Clean J5 Exit E A lr These commands are used to print or store the 3D window in one of the following formats 2 22 Tolerances When defining 3D geometry objects are automatically connected when their coordinates match This means that 1f one line ends at a given coordinate and another line starts from this same coordinate these two lines will be connected Similarly a support point is connected to a line 1f the line ends starts in the same DeepC SESAM 2 32 01 DEC 2010 Program version 4 5 point as the support is defined in To ensure that objects are connected although their coordinates don t match perfectly but are very close one has to specify tolerant modeling The relevant actio
15. Soil is the last tab Aa dro ro fede orario Gravity 3 80665 m s a m s2 Ar Water Soll Seabed lt mudline 639 1 am mn Seabed normal Y Wector3a 0 m0 m 1 m Seabed property floor Cancel The Soil tab takes the following parameters e Seabed Z mudline Z level of the seabed e Seabed normal Normal vector of seabed surface e Seabed property Select a seabed property Section 4 11 6 defining seabed constants SESAM DeepC Program version 4 5 01 DEC 2010 4 31 4 11 17 Scatter Diagram E a Environment Alr Directions Pa EDDY _locatiog H H Block_A Rename Delete Edit Location Set Active location Results Structure New Irregular Time Condition 3 Structure Propertie New Regular Time Condition fH 3 Utilities New Scatter Diagram Ey Vessels Information Copy Paste The scatter diagram dialog looks like catre Diaeram C Iregua Q Scatter table F Fill with example _ Sen Bc oPepry gt stp ui ijj ta StatT 15s 258 34s 458 55s 65s 7 58 85s 95s 10 5s 115s 2 0sm 181387 8858 11860 6342 1883 369 58 T 3 pim 283 9880 48760 77280 S5697 23757 7035 1607 A 41121815 1588 6200 74498 48804 20680 6445 5 Pam 2 248 6955 32265 58750 s0891 28280 11141 asno fise 13643 32888136675 26888 12782 7 Pm 510 4984 16029 23727 20083 11280 Bo f sm 2 N 1670 6903 12578 12688 8259 gps po 521 2701 59
16. e Animation file name Animation will be stored in the analysis directory in a file with the name lt Anima tion file name gt vtf e Start time End time Specify time interval in analysis from which animation shall be produced e Frame rate Specify that every Frame rate time step shall be included in the animation e X Y min max Specify extent of the sea surface that shall be included in the animation e Grid spacing in X Y direction Specify the subdivision number of elements of the sea surface in the X Y direction SESAM DeepC Program version 4 5 01 DEC 2010 4 155 4 19 5 Multiple Analysis New Analysis Generate Multiple Input Files Execute Multiple Analysis Paste Fields Folder Properties Save HTML Report The multiple analysis dialog looks like Ml Define Multiple Analysis 2 Scatter discretizations ScatterDiscretizatior Analysis template 8 Analysis table 9 Mra MEA eat eat O EJ cara e This dialog is used to generate multiple nonlinear analysis objects corresponding to all scatter bins in a scat ter discretization Section 4 11 18 Each row in the table defines one analysis The following parameters must be specified Scatter discretization Select a scatter discretization To the right it is shown whether the selected discre tization is H T regular or Hs Tp irregular Analysis template Select an already existing analysis that will used as a template for al
17. 2 19 Graph Controls Many of the dialogs and postprocessing tools utilize a graph control By right clicking inside a graph con trol one gets access to the graph control actions DeepC D02 2 06 Date 17 Oct 2004 18 20 19 Jonswap Spectrum Foom All Lin Copy Bitmap Copy Metafile Frint LO z C settings K g N Lin o LO o 5 10 15 20 25 30 35 40 Wave Period T The actions here include e Zoom All Make entire graph fit within the graph window e Copy Bitmap Metafile Copy the graph to the clipboard and paste it into applications like Microsoft Word and Excel for reporting e Print Make a hardcopy of the graph SESAM DeepC Program version 4 5 01 DEC 2010 2 29 Setting This action makes the following dialog appear T Graph Settings Fonts Anis Lines Settings Bold Italic Underline Font type SIZE Color Sample 4 Header i This is a test Jonswap Spect Labels W wave P This is a test M Y sim Annotation Prograrri M header On the first tab headers labels and their look is specified The second tab contains axis specifications T Graph Settings Fonts xls Lines Settings axe tpe Linear ki fais type Linear TD Manual limit Flin Max Manual limit bin Max I Show grid Ld Manual ticks Y T Manual Y ticks Y No small ticks jo Nao small ticks jo E Cancel Apply DeepC SESAM 2 30 01 DEC 2010 Program ver
18. 5 Spectra Contains spectra computed from selected time series 6 Vessel Time Series Contains time series of vessels viscous force elements on vessels wind velocity wave elevation etc 3 Fatigue Results Results from the fatigue calculations 4 Static Results Results from the static analysis 4 24 Results Data Types 4 24 1 Display Probability Distributions Environment 3 Fatigue 1 3 Results 1 3 Dynamic Results 3 Distributions 3 Filtered Time Series 3 Line Time Series ES Range Curves 53 Spectra EJ Vessel Time Series Fatigue Results 13 Static Results h Line2_ chain pare A Line3_chain_upper_Eli Delete z f Line4_chain_upper_El Rename E f LineS_chain_upper_El i Line6_chain_upper_Eli Weibull Graph A Line7_chain_upper_Eltrrer r Tea ir aol SESAM DeepC Program version 4 5 01 DEC 2010 4 185 Distributions are generated from time series Use Display Probability Distribution to display the cumula tive distribution function at Graph Window ao DeepC D4 2 01 Date 21 Now 2008 16 41 10 riser RiserbinchStrake Element 1 Te 1 Probability o 01020304050607 080 9 1e 006 1 18 006 1 28 006 riser1_Riserbinchstrake_Element_1_Te 3 parameter Weibull fit Scale 87088 Location 991221 Sh riser1_Riserbinchstrake_Element_1_Te Sample Cumulative Distribution Function 4 24 2 Weibull Graph B Fatigue A Line2_chain_upper_Element_1_Te Weibu
19. Bending stiffness cume y Cu rvatu rel Bending Moment 1 0 0 120 kNm 2 0 001 30 kNm 3 0 002 300 kNm 4 E ss mo Ba Deep D2 3 09 Date 23 5 ae Bending Moment Curve _ O LL 0 5 ES e 5 T E a co 0 0 0005 0 004 0 0015 0 002 Curvature 1 L DeepC SESAM 4 66 01 DEC 2010 Program version 4 5 C Homogeneous pipe Y General Y Youngs modulus Pa Geometry Axial Stifness Bending Stiffness Torsion Stifness f Constant bending stifness Bending stiffness curve 4 El Bending Stiffness 7 1150 MNE Nm W Friction moment T 1000 kNm Mr The following parameters may need to be given e El Bending Stiffness Constant bending stiffness bending moment per curvature e Friction moment Up to the friction moment if specified the bending stiffness is taken as 10 times the specified EI Energy dissipation will result from specifying a friction moment e Curvature Segment axis change in direction per length e Bending Moment Bending moment at given curvature Torsion stiffness is specified on the fourth tab It looks as follows depending on the selection of homogene ous pipe or not and whether or not the stiffness shall be constant f Homogeneous pipe Y General Y Youngs modulus 200 GPa ts Pa Geometry Adal Stiffness Bending Stifness Torsion Stiffness Constant torsion stiffness C Torsion stifness curve Q Calculated based on Youngs m
20. Ea Siru New Spreading Function New Jonswap 5 Parameter 69 Struct New Current Profile New Pierson Moskovitz i Jeu ete j el J H E Utilitie oe New Bretschneider on yesse O Fields New User Spectrum Folder Properties Cove HTM Darrnrt SESAM DeepC Program version 4 5 01 DEC 2010 4 23 The Torsethaugen dialog looks like Li Greate Edit Wave Spectrum Jonswap 3 Jonswap 5 A Aretschnei f New Edit existing WaveSpectrum A F v Alea ye Torsethaugen Spectrum Peak period E 8 Spectral peak 0 6991317008r rad s an 20 30 40 Wave Period T Cancel Apply For a description of the Torsethaugen spectrum see Ref 4 4 11 12 User Defined Wave Spectrum gj Environment zj CurPr a A E CurPr z i Jonsi a h Jonsz i Jons i Jonsy Wave Spectrum New Jonswap 3 Parameter New Spreading Function New Jonswap 5 Parameter New Pierson Moskovitz New Bretschneider New User Spectrum Properties New Current Profile Fields Folder Properties Save HTML Report DeepC SESAM 4 24 01 DEC 2010 Program version 4 5 The user spectrum dialog looks like L Greate Edit Wave Spectrum Jonswap 3 Jonswap 5 Pierson Moskowitz Bretschneider User spectrun New f Editexisting WaveSpectrum2 Allow edit Spectrum values E Ba Ba Fi Deept D2 30 4 E A A la E U
21. External wrapping is typically used to model buoyancy elements attached to the segments They are defined by the following parameters e Specific Buoyancy Volume AE cross sectional area of wrapping volume per length e ation Radius of gyration around local x axis e Fraction Fraction of the segment that is actually covered by the wrapping Conceptually this can be thought of as splitting the wrapping into an infinite number of pieces distributing these pieces along the segment and the given fraction of the segment will be covered by the wrapping e Mass Mass per length of wrapping Note that hydrodynamic forces on the external wrapping is included in the cd segment coefficients Section 4 13 2 SESAM DeepC Program version 4 5 01 DEC 2010 4 55 4 13 4 Marine Growth i Structure Properties New Cd Buoy New Cd Segment New External Wrapping Fields Folder Properties save HTML Report Vessels The marine growth dialog looks like f New Edit existing MarneGrowth1 I Allow edit Density of growth Kgm 3 Layerthickness m x Marine growth is defined by the following parameters e Density of growth Density of the marine growth e Layer thickness Thickness of marine growth layer The buoyancy of the marine growth is calculated based on the layer thickness and the segment cross section Mass per length of the marine growth is calculated based on the density of the growth the layer t
22. New Support Labels Fields Folder Properties save HTML Report The line dialog looks like L Define Line C New Edit existing ooL M Allow edit e Internal fluid foil Properties IY Compute kinematics Ge At every f node Line end pozitions __ ___ _ _ __ _ _ _ _ __ _u_ _______ _ End 1 Pointj 21 OO m 0 m 5 mi End 2 Point 2 m0 m 5 m Points distance 2098 m Initially stressed segments 2 Segment definition 2 PO PE CI 5 LO OEA EL ED OA AS aoe Boe o a 70m scope merope mens pee 1769670007 tonne eom beeu O O A on EOE 750m see pipe fhyaro pee mens pps 1789470001 tonne 198m sec_strek _ hydro_streke mdensstra 5021200601 tonne am eennecto yato sate Saens stra fogos O 2 Cancel Lines are used to represent mooring lines tension leg tethers risers and other slender beam objects Each line is subdivided into a number of segments 1 e one or more Each segment typically has constant cross sectional properties The following parameters must be specified for a line e Internal fluid Select an internal fluid if any to represent the fluid content of the line DeepC SESAM 4 118 01 DEC 2010 Program version 4 5 e Compute kinematics Specify whether wave kinematics and wave forces shall be computed for the line This setting is only relevant for analysis where it is chosen to include wave kinematics on
23. SESAM USER MANUAL DET NORSKE VERITAS SESAM User Manual DeepC Deep water floater motion analysis December 1 2010 Valid from program version 4 5 Developed by Det Norske Veritas and Marintek Developed and marketed by DET NORSKE VERITAS DNV Software Report No 00 0000 Revision December 1 2010 Copyright 2010 Det Norske 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 Hovik Norway Telephone 47 67 57 99 00 Facsimile 47 67 57 72 12 E mail sales software sesam dnv com E mail support software support dnv com Website www dnvsoftware 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 2 1 22 2 3 2 4 2 5 2 6 2 2 8 2 9 2 10 2 11 2 12 2 1
24. SESAM DeepC Program version 4 5 01 DEC 2010 2 21 The two main lists on this tab are connected to cursor tooltips that pop up when you move the mouse cursor over objects in the 3D window Description Line Name risers Section axiRiserdinch Select items in the left list and press Add to make the entry pop up as part of a tooltip Conversely select an item in the right list and press Remove to remove the entry from the tooltip On the next tab Model you find two sections Beam presentation E Wireframe C Outline section C Hollow section f Solid Color code settings Property type IO E Color palette Cancel Apply DeepC SESAM 2 22 01 DEC 2010 Program version 4 5 The Beam presentation section is used to specify how you want to visualize your lines risers mooring lines etc Wireframe type visualization is typically used to speed up visualization of large models Color code settings are used to specify colors and settings for the Color Code Property action Section 2 13 Most of the settings on the last tab Annotation Diagrams are not relevant for DeepC 2 15 Units All data can be input with a unit specification Thickness 10ft m Database units the units in which the data are stored can either be changed from the default setting when a new project is established or changed by the FIRST script command The database units cannot be changed later on One should
25. T1 FEM E Local ongin offset on FEM file 0 Mm mn Length Unit This dialog is used to read in a finite element file representing the geometry of the vessel DeepC does not employ this file for any other purpose than visualization The file may be a top level super element in a super element hierarchy Before pressing OK the following parameters must be specified e Interface file Specify the path to the finite element file These files are typically named T FEM e Local origin Z offset on FEM file The coordinates on the FEM file are referenced to the vessel local coordinate system with an offset in the z direction specified in this field A positive local origin Z offset will move the geometry up in positive Z direction e Length Unit Text specifying the length unit of the coordinates on the interface file DeepC SESAM 4 88 01 DEC 2010 Program version 4 5 4 15 4 Vessel Data E i Vessels supply _boa semi supply_boa CNRS supe ate Rename 1 Vessel Data Vessel Mass Artificial Stiffness Hydrostatic Restoring Linear Current Read Vessel Data Read Vessel Geometry Fields Folder Properties save HTML Report Quadratic Current Wind Force Calculate Retardation Function Linear Damping Quadratic Damping Fairleads RAO Functions Viscous Force Specified Force Quadratic Transfer Functions
26. 2 5e 006 3500 4000 4500 5000 5500 6000 LF Line10_chain_upper_Element_1_Te Mean 2 88699e 006 Std 175937 I 4 24 7 Compute Probability Distribution 3 Results le riser 3_ ae Element 5 _Mz1 E Dynamic Results a2 D htir Homoni E Mz B 9 Distributions rid Delete pa 3 Filtered Time Series rig Rename ju y Line Time Series pu E Range Curves y Compute Spectrum F Spectra A Low Pass Filter a E WVessel Time Series ria Compute Probability Distribution H Fatigue Results H B Static Results za Structure Display Graph Parametric Graph A cumulative distribution function is generated from the selected time series when Compute Probability Distribution is chosen The result ends up in the Distributions folder Note that several time series can be selected when performing this action DeepC 4 190 4 24 8 Range Max Min J Analysis Ju Environment SESAM 01 DEC 2010 Program version 4 5 Range Max Min Range Mean Stdw Range Statistics Select Result Coordinate P Select Result Component P When Range Max Min is chosen the maximum minimum value of all timesteps is plotted along the line at Graph Window Ceept 022 10 Date 06 Dec 2004 08 33 16 pet Ra E S W5 amp a ER g T pet sample Max and Min for riser A C IS AAA EA 400 300 1000 1200 Line Coordinate m SESAM Program version 4 5 01 DEC 2010 4 24 9 Range Mean Stdv 53 Analysi
27. Cab nondimensional linear tangential drag coefficient Cin nondimensional linear normal drag coefficient Cmt nondimensional tangential added mass coefficient Cmn normal added mass coefficient Cmn IS Normally equal to 1 0 for a circular cross section e Quadratic Drag Cqx Cy SESAM DeepC Program version 4 5 01 DEC 2010 4 53 e Quadratic Drag Cqy Can e Added mass Cax Cnt e Added mass Cay Cin e Linear drag Clx Cat e Linear drag Cly Ore e Hydrodynamic diameter Specify the cross sectional diameter to be used when calculating wave forces Note that if external wrapping is used the cd segment coefficients should include the effect of the external wrapping 1 e one cannot specify cd segment coefficients for the wrapping This also means that the coef ficients must account for the added diameter that the wrapping represents Buoyancy however will be the sum of the segment and external wrapping buoyancy 4 13 3 External Wrapping Ey Structure Properties 3 Load Interf Ey Materials New Cd Buoy 3 Mesh Dens New Cd Segment 53 Sections sq Slender Ca New Marine Growth ho Utilities A Fields Vessels Folder Properties Save HTML Report DeepC SESAM 4 54 01 DEC 2010 Program version 4 5 The external wrapping dialog looks like Mey Structure Properties f New Edit existing EtWrap 1 IY Allow edit Specific Buoyancy Volume 4E Radius of gyration Fraction Mass
28. Fields E 3 Structure F a J Utilities foal Vessels Folder Properties save HTML Report The ball joint dialog looks like MEY Define eal Joint Bo New Edit existing Baloin A Alowedi Line ser Segment Riserbinch Fistend Last end Component Component Hydrodynamic load HydrodynamicLoad Rotation hinge RotationHinget Ball joints are used to model a hinged connection between two line segments or between a line segment and the vessel In a coupled lines vessel analysis 1 e the vessel motion is calculated together with the lines using a ball joint at the point where a line is connected to a vessel is a way to get a hinged connection between the line and the vessel In an uncoupled analysis on the other hand it is possible to define the stiff ness properties and static rotation of a fairlead connection Section 4 15 15 This means that if a line has nonzero bending stiffness a ball joint should usually always be specified at the connection point to the ves sel in a coupled analysis The following parameters are needed to define a ball joint e Line Select a line on to which the ball joint will be connected e Segment Select a segment on to which the ball joint will be connected e First end Last end Specify that the ball joint shall be attached to the first
29. Fixed The vessel is fixed Time series on file The vessel motion is read in from a file Time series from existing analysis The motion is taken from the time series of an existing analysis that has been executed e Analysis Select an analysis Relevant when motion type is taken from another analysis e File Name Specify the name of the file containing the motion time series Relevant when motion type is Time series on file e File Type Select that the motion time series is taken from an ASCII or a start times file The ASCII file must be formatted such that the time steps and the X Y Z RX RY and RZ motions have one column each File Type Global Dynamic Dieplacement Global Position and rotation of vessel at a given time step is found by first putting the vessel in the origin of the global coordinate system Rotations are defined as Euler rotations about the X Y Z axes in a vessel local coordinate system where the origin is at the vessel initial position Initially the axes are parallel to the axes of the global coordinate system Rotations about the Z axis is performed first then about the intermediate Y axis and at last about the intermediate X axis The vessel is translated DeepC SESAM 4 134 01 DEC 2010 Program version 4 5 out to the given global X Y and Z coordinates The vessel position as defined in the new vessel dia log Section 4 15 1 will not have any impact on the placing Dynamic Displa
30. Information The multiple regular time conditions dialog looks like Mi Veins muliols reyobir dale condition Regular time conditions pde ptes on i gt heme negara wave br vievenodesecuren Sorento cure recion a fer ET 7s Aw e O 2 js jente lis ar O a mes as Bit 165m88s SSCA a piss Bint 17 5mit8s a e o S carcel aw The purpose of the table in this dialog is to define regular time conditions wave and current parameters for each bin in a scatter discretization 1 e the scatter discretization from which the dialog was activated Each such regular time condition will later be used to define the environment parameters of a time domain analy sis The table has the following columns Block Scatter discretization block Bin Bin within the scatter discretization block H Wave height of scatter discretization block T Period of scatter discretization block Name Specify name of regular time condition By pressing the uppermost row in this column all names are filled in automatically Regular Wave Select a regular wave to use for the sea state SESAM DeepC Program version 4 5 01 DEC 2010 4 43 e Wave Direction Select a direction property for the direction of the regular wave e Wave Model Select Airy linear wave theory or Stokes 5th order wave theory e Use Current Specify whether to include current e Current Profile Select a current profile e Current Direction Select a current directi
31. New Scatter Diagram Iregua Irregual Information Irregual The regular time condition dialog looks like Maris onion Reglond templa ls Wave Current Director Component Wave model Direction A aye Regularwave_1 4 10 A de Ain Cancel Apply The first tab is where the water parameters are specified e Direction Select a direction property for the direction of the regular wave train e Component Select a regular wave component e Wave model Select Airy linear wave theory or Stokes 5th order wave theory DeepC 4 47 DeepC SESAM 4 48 01 DEC 2010 Program version 4 5 On the second tab current parameters are given Wave Curent W Include current Direction Dicuri 4 Curent profile CurProfl e Use Current Specify whether to include current e Direction Select a current direction e Current profile Select a current profile 4 12 Structure Properties Data Organization Structure Properties describe common attributes on geometrical entities They are organized into the fol lowing folders when all the modules of DeepC are loaded 2 0 Structure Properties 9 Combined Loading 23 Fluids E Materials _ Pipes lt Fatigue Section Stress Parameters SN Curves Stress Concentration Factors 1 3 Load Interfaces ES CD Boupz C CD Segments 23 External W rappings Marine Growths C Materials Mesh Densities Pipe in Pipe Contacts Sections 23 Asi
32. i e support points and fairleads with specified rotation will be rotated to their static equilibrium position and line ends will be moved from stress free position to static equilibrium position SFOR Specified forces static point loads Section 4 19 3 CURR Current forces PIPE Pipe 1n 1pe contact forces Section 4 17 2 ISTR Initially stressed segments Section 4 17 1 FLOA Floater forces forces from the vessels FRIC Activate bottom friction BEND Bending stiffness lt Remove Type gt Select this option when you no longer want to apply any load SESAM DeepC Program version 4 5 01 DEC 2010 4 145 The third tab in the static analysis options dialog looks like MY Se aeda Options Static Analysis Load Sequence Static Point Loads Position and magnitude ne nang Sep name Fracto nose x Fv Fe Um ty Wa toordnateayaten risert_ Risersin_ 04 9 ttt f f Js ERES Wy a a Cancel This tab is used to specify point loads in nodes on the line segments e Line Name Name of line e Segment Name Name of segment e Fraction Fraction 0 0 to 1 0 along segment specifying the point node at which the force shall work e Node Read only information column showing the node number of the nearest node to the specified Fraction Fx y z Force component in X Y Z direction e Mx y z Moment about X Y Z axis e Co ordinate system Select the coordinate system that the force components ref
33. regular time condition CB e5 1125 Specify vessel motion characteristics 2 Vessel Motion Type Analysis File Name File Type Reference System Angle Unit Columns Time Series X offset Y offset Z offset 1 semi RAO functions ASCII Global Radians 1 2 3 4 5 1 01 2 01 3 0m Om om Apply OF Cancel The fields in the dialog have the following interpretation e Regular time condition Specify this option if you want to run a regular wave analysis Select a regular time condition containing the environment data for the analysis Requires RAO functions Fixed or Coupled as Motion Type SESAM DeepC Program version 4 5 01 DEC 2010 4 133 e Irregular time condition Specify this option if you want to run an irregular wave analysis Select an irregular time condition containing the environment data for the analysis e Vessel The table contains all vessels in your workspace For each vessel you have to define how the motion shall be calculated and the corresponding parameters e Motion Type Specify how the vessel motion shall be calculated Motion Type R40 functions Fixed Time series on file Time series from existing analysis Coupled The vessel motion is calculated during the time domain simulation with the nonlinear effects of the attached lines included RAO functions The vessel motion is calculated based on the environmental input and the RAO functions of the vessel
34. 01 DEC 2010 SESAM Program version 4 5 Spectra can be computed from time series A spectrum shows the energy density as a function of frequency Note that several time series can be selected when performing this action Jat Graph Window File Ls mo ma Deept D4 4 03 Date 04 May 2010 14 02 46 Line6 FairleadChain Element 2 Te p eu ot E ka o o a un D w o a 8 ol g o La o LL 0 01 02 03 0 4 06 Of 08 09 1 Line6_FairleadChain_Element_2 Te S0 9537 65 51 4549 37 52 2507 7 53 1588 41 4 24 6 Low Pass Filter Ai Results E Dynamic Results 29 Distributions i Filtered Time Series 3 Line Time Series a Range Curves fa Spectra Vessel Time Series E a Fatigue Results Eg Static Results lfm Structure ml riser et riser 3_Riser in chStrake Element_6 Rmi Delete Rename Compute Spectrum Compute Probability Distribus Display Graph Parametric Graph i AAA AS SESAM DeepC Program version 4 5 01 DEC 2010 4 189 Low pass filtering separates the high frequency response from the low frequency response The resulting time series end up in the Filtered Time Series folder Note that several time series can be selected when performing this action An example of a low frequency time series look like D Graph Window DeepC D2 3 10 Date 07 Dec 2004 16 00 54 LF Linel0 chain _ upper Element 1 Te co O T a oe en Force N
35. 4 22 4 Show Combined Loading Listing File Description tz CL AnaReg 14 10 D0 Combined Loading Analysis 22 CL AnaReg 14 10 045 Combined Loading Analysis tz CL AnaReg 14 10 D90 Combined Loading Analysis Cl_4na_ 14 10 00 combis o adina alui tz CL Ana 14x10 D02 Delete ECL Ana 14 10 045 Rename SSCL Ana 110 AA ECL na 14 10 090 A a SCL Ana 14 10 D90 Run Combined Loading Analysis E CL_template Set Current View Result Component Copy Paste SESAM DeepC Program version 4 5 01 DEC 2010 4 181 Select this action to show the listing file of the combined loading analysis E casper psn lis Notepad Sele Combined Loading Capacity Checks Metallic Risers Codes DNV OS F201 wSD LRFD API 2RD WSD Von Mises 150 13628 7 WSD Version 2 1 3 10 04 2008 ioi bo obk beo oik Beo ik beo ik moik f Poir bo oi bo mob moik obk mobot roi ikh Re fr fr oik bo i Rp AA lt lt lt lt lt lt lt lt lt lt u Poir o oib b bobb boib oik moi t ioi ieo bh be oik moik bo mob H Program licensed to License expiry date Run date and time Generic database Tile name I 4Cap_er Generic output file name gt Casper_r1 Processing methodolO0QY lt lt lt lt lt lt lt lt 0 lt 000 00 0 0 02 Statisti Duration for extreme value estimation Acceleration of gravity Fluid data 4 22 5 Combined Loading Contour Plot To see a combined loading contour plot of the u
36. 4 5 01 DEC 2010 1 1 1 INTRODUCTION 1 1 DeepC Deep Water Coupled Vessel Motion Analysis DeepC is an interactive program used to model floating configurations attached to the seabed with mooring lines tension legs risers etc It employes the Marintek developed programs Simo and Riflex to perform the non linear time domain finite element simulations The results of the analysis can be viewed within the DeepC environment The intuitive and modern GUI supports rapid model and analysis set up and efficient post processing DeepC uses input from HydroD Wadam and reads all necessary hydrodynamic results from the SESAM Interface File SIF Additional vessel data such as current wind viscous damping coefficients etc 1s speci fied directly from the DeepC GUI DeepC modelling features include complete environment description of wind waves and current Complex mooring and riser systems are efficiently modelled and displayed by the high performance 3D graphics Post processing capabilities include 3D contour plots of the static configuration and forces moments on the mooring lines risers 3D contour plot of fatigue damage along risers and a number of 2D plots and statistical results In addition 3D animations of the dynamic time domain results are produced by DeepC and can be viewed in Sesam Xtract All user interactions are logged to a journal file based on the JScript scripting language and can be used to re create the model The journal file ma
37. Chapter 4 USER S GUIDE TO DEEPC gives an explanation of how to model in DeepC This chapter includes a description of all the objects and how to model them e Chapter 5 COMMAND DESCRIPTION contains information about how to retrieve the command descriptions 14 Acronyms frequently used in the Manual RMB Right mouse button LMB Left mouse button GUI Graphical user interface DOF Degree of freedom MWL Mean water line TTR Top tensioned riser 1 5 Status List Updated status lists are available through the SESAM download system The DeepC status list can be accessed from the DNV Software home page http www dnv com software SESAM DeepC Program version 4 5 01 DEC 2010 2 1 2 APPLICATION FRAMEWORK This chapter provides an insight into the generic application independent tools that are employed in DeepC and other Sesam programs 2 1 GUI Configuration When DeepC is started the following window appears Li Saleee features ty use Feature Use Coupled M Fatigue M Riser F Code check F Here the user can select the tools that are to be used in the DeepC session The GUI will then be configured such that only those folders tool buttons etc that are relevant for the selected analysis type are shown 2 2 New Workspace Before one can start modelling one has to open up a new workspace The relevant action is reach
38. FE nodes belonging to the pipe The slave pipe will experience contact with the master pipe as discrete element loads PIPE load type must be activated Section 4 19 3 The dialog contains the following DeepC SESAM 4 120 01 DEC 2010 Program version 4 5 Pipe Select Outer and Inner pipe Each of the pipes are ordinary single lines When a pipe is selected segments for that line are available in Start End segment fields Pipe in pipe contact will be established from Start segment to End segment for the two pipes Start segment For each of the pipes select the first segment to have pipe in pipe contact Only valid seg ments will then be available in End segment field End segment For each of the pipes select the last segment to have pipe in pipe contact Master Select outer or inner pipe to be master The other pipe will then be a slave pipe Contact property Pipe in pipe contact property Section 4 13 16 Fill from selection Inner and outer pipe line segments may be selected graphically in the 3D window By pressing the Fill from selection button selected segments will be filled into the Pipe Start segment and End segment fields The line having the selected segment with largest outer contact diameter will be the outer pipe 4 17 3 Stress Joint y Ey Str C Stru New Line CJ Utilit New Stress Joint LJ Ves Stress Free Coordinates Show Stress Free Configuration Hide Stress Free Configuration
39. NO ei 4 102 4 15 14 Coupled Vessel Fairlead alan Orionis idad 4 104 AS 15 Uncoupled Vessel Bair leads is 4 105 ALSO ANO EUA CLOS ca 4 109 4 15 17 Viscous Forces Morison Elements idas 4 110 ASS Spee ed POr usarla 4 113 4 15 19 Quadratic Transfer Functions a Nba 4 115 4 16 Structure Data OO AZ ON Ra 4 116 AT Structure Data PES A E A ERA 4 117 A II E A A 4 117 O PIDE aoe an AET E E SN MCE E E E O ae ae 4 119 Wa Le S O a A TEENE EEEE A 4 120 ALTA STess FreeC OOLGIMAUC Ses cir a 4 122 AIS a II Rete 4 124 4176 Edit Combined Loading Properties ci sa5 cicadas a 4 125 An Bal JOM rindo ida lila 4 126 A VCR oe dde dele dende e 4 127 E O A A A eee 4 128 NA A A nD tree eer REP ts RN Eo mnt 4 129 AS Analysis Data Oc di 4 131 Ai MDS Analysis Data Ty DES nia 4 132 4 20 4 21 4 22 4 23 4 24 KIST ING PRINS SUS scsi taco Natl ee a een al elt a hse hahah hae Sel 4 132 A 19 2 RESPONSE DOTADO aos 4 135 4 193 Statie Analysis OpHUONS isa 4 141 4194 Dynamic Analysis Options E A EE E 4 146 ALIS MAPE ANAS S en a a N 4 155 4 19 6 Generate Multiple Input Files Export 0 cccccccceceeeeeeseeeeeeeseeeessssssessssaaeeeeees 4 157 4 19 7 Execute Multiple Analysis Execute AnalySIS ooooooocccnnnonnnnnncnnnnnnnnnnnnaninnnanannnos 4 158 IIS Read State Result a 4 160 ALO Read Dynami RESUMES ao 4 161 ALTO Read Vesse r RESONS srl dica 4 162 AAD Mell TCA ARES UNS dial 4 163 AAO AD View Static COn Or all OMS x aaa 4 164 ALL SUAEU
40. SESAM 4 2 01 DEC 2010 Program version 4 5 e Line Typically a mooring line riser tension leg etc Slender structural element e Analysis Defines the execution parameters for Riflex and Simo in a nonlinear time domain analysis and binds all the model data together 4 2 The Modelling Loop Run Hydrol to calculate Create FEM panel SUN DAON LO CAIGA volume floaters damping excllalan tones etc from potential theory Prior to running DeepC one has to run HydroD to calculate added mass potential damping excitation forces and if desired second order results HydroD again requires panel models of the large volume floaters Once HydroD has been run all remaining modelling and postprocessing is done from within DeepC with the exception of 3D animations that are displayed in Sesam Xtract 43 Potential Theory Calculations in HydroD Wadam HydroD has it s own user manual that should be referenced for guidance on how to do the potential theory calculations There are however a few things that should be specially considered when the results shall be utilized in DeepC If the panel model used in HydroD has no symmetry headings should range from 0 degrees to and including 360 degrees Logically this is duplication of the same data but Simo used by DeepC to calculate large vol ume floater motions needs the duplicate headings With a panel model that has one or two planes of sym metry headings should range from 0 degrees up to an
41. Section 4 13 22 Create lines Section 4 17 1 Create pipe in pipe Section 4 17 2 Create stress joints Section 4 17 3 Specify stress free coordinates Section 4 17 4 Assign fatigue properties to the segments Section 4 17 5 Assign combined loading properties to the segments Section 4 17 6 Create buoys Section 4 17 9 Create ball joints Section 4 17 7 aa Create flex joints Section 4 17 8 4 7 6 Analysis Create a analysis single analysis to be used as a template Section 4 19 1 Specify response storage on analysis Section 4 19 2 Specify static parameters on analysis Section 4 19 3 Specify dynamic parameters on analysis Section 4 19 4 Export analysis Section 4 19 6 Execute analysis Section 4 19 7 Edit static dynamic parameters and or check your model if solution did not converge Create multiple analysis by copy paste and or by using the multiple analysis dialog Section 4 19 5 Generate multiple input files Section 4 19 6 Execute multiple analysis Section 4 19 7 SESAM DeepC Program version 4 5 01 DEC 2010 4 9 4 7 7 Fatigue a Create fatigue analysis Section 4 21 1 b Run fatigue analysis Section 4 21 2 4 7 8 Combined Loading a Create a single combined loading analysis to be used as a template Section 4 22 1 b Create multiple combined loading analysis Section 4 22 2 C Run combined loading analysis Section 4 22 3 4 7 9 View Results Read static results on relevant analysis Section 4 19 8 View static configuration Se
42. ZeroWave Jonswap Spectrum Wave Spectrum New Jonswap 3 Parameter New Spreading Function New Jonswap 5 Parameter New Current Profile New Pierson Moskovitz Utilities New Bretschneider New Torsethaugen las Fields New User Spectrum Folder Properties Save HTML Report The Bretschneider dialog looks like Ed ave spectrum Jonswap 3 Jonswap 5 Pierson Moskowitz Bretschneider Torsethaugen User spectrum f New Edit existing WaveSpectrum1 lw Allow edit 30 40 10 20 Wave Period T Cancel Apply DeepC SESAM 4 22 01 DEC 2010 Program version 4 5 Bretschneider spectra are defined by the following formulae Sp 0 Aw exp 9 0 O lt M lt A El Es B 496 T The relation between peak period Tp and zero crossing period is T gt 1 1 408 Significant wave height H Equals 4 sqrt mp where mg is the variance of the wave displacement time series Approximately equal to the average of the highest one third of the waves e Peak period Tp Period with maximum energy density 4 11 11 Torsethaugen Double peak Jonswap spectrum with 2 parameters oa Environment Mispread Cosine Spreading Function E Air i Swell_spec Jonswap Spectrum E Ze Calm_location i Wave_spec Jonswap Spectrum Directions i ZeroWave Jonswap Spectrum 225 Env100Year_location Soil ey Fatig Properties H T Resuli Wave Spectrum d New Jonswap 3 Parameter
43. arguments should be given command lane options Command ine arguments Commands executed Deepc Start program without database DeepC flename fnew Open new database com path input js Run a command input file fexit Exit after running command input file features Fea1 Fea2 Configure GUI to use specified features or help Show this help dialog Coupled analysis Riser analysis Anchor analysis Fatigue may only be selected together with Coupled or Riser Code check may only be selected together with Coupled or Riser Examples DeepC workspace 1 features Coupled Fatique Open existing workspace 1 ddb database Use features Coupled and Fatigue DeepC workspace features Riser Fatique com workspace2_append js exit Open workspace2 ddb run workspace2_append js file exit immediately Use features Riser and Fatigue DeepC workspace3 new ffeatures Riser com workspace3_in js fexit Open new workspace3 ddb database run workspace3_in js file exit Use features Riser DeepC c my catalog workspace4 workspace new features Riser CodeCheck com c another catalogue workspace4_in js fexit Open new workspace4 ddb database run workspace4_in js file exit Use features Riser and CodeCheck Observe that command input files may indude an absolute or relative path arguments may be entered in any order if file paths include spaces use DeepC SESAM 2 28 01 DEC 2010 Program version 4 5
44. b All objects of relevant type that have been selected either in the 3D window or in the browser will be assigned the property SESAM DeepC Program version 4 5 01 DEC 2010 2 9 An example use would be to first select two segments in the 3D window Subsequently a property in this case a section is right clicked and Apply property to selection is chosen IIS B Sm i tie palletes op E l j sec i Delete i 7 Rename Edit Color Code Property Remove Section from selection The two segments are now using the selected section 2 8 Named set From the Utilities gt Sets menu the New Set command can be reached Guiding Geometry lt EES Yess E Fields Save HTML Report DeepC SESAM 2 10 01 DEC 2010 Program version 4 5 In the Named Set dialog you can add the selected objects in the graphics window to a new or existing set and you can remove the selection from an excisting set Set_linesN orth Include selection in set Cancel O Remove selection from set You can also reach the Named Set dialog by right clicking on a selection in the graphics window Move End Copy Edit Line Edit Fatique Properties Edit Combined Loading Properties Edit Soil Interaction Properties Compute Line Shape Labels View options Visible model SESAM DeepC Program version 4 5 01 DEC 2010 2 11 By right clicking on a Set
45. be extracted e Endl End2 Coordinates Line end coordinates in global coordinate system e Endl End2 When selected decomposed forces will be calculated for the line end SESAM Program version 4 5 4 19 3 Static Analysis Options DeepC 01 DEC 2010 4 141 Before a dynamic time domain simulation can be performed on the system the static configuration must be determined This configuration will be the initial position in the dynamic analysis Hame y E anim LE decay Y release Description Anal 0OY Environment Set Current Response Storage Static analysis Options Dynamic analysis Options Export Execute Analysis View Static Configurations Start Xtract Response Post Processing Read All Results Read Static Results Read Dynamic Results Read Vessel Results Information Copy Paste DeepC SESAM 4 142 01 DEC 2010 Program version 4 5 The first tab in the static analysis options dialog looks like alta Analysis Uphons Static Analysis Load Sequence Static Point Loads STAI Description Hur2000 static analysis Load mass formulation and solver type Concistent load and mass formulation Sparse solver Print log Model data Tabulated print of system environment Static load steps Final load step only Displacement nom Print of displacement norms Apply This tab is used to specify some general parameters for the static analys
46. check Approach e LAFO C WSD Lirit State e ULS SLS ALS Functional load group F 2 Safety Class C Low Normal High Analysis time window 9 W Limit time interval Start time End time Time interval fions s 1e 010 z Humber of periods Statistical processing y Duration 10800 s s Percentile fo AY Fill expected extreme ero dynamic response criteria 79 Tension tolerance 0 1 N M Moment tolerance 0 1 Mr Mm Limit state function tolerance ja Select segments Y Add Selected Segment riser Riser inchBottom riser RiserSinchStrake reer reer esne OOO OOOO g DeepC SESAM 4 176 01 DEC 2010 Program version 4 5 A combined loading analysis is based on force results tension and bending moment from one structural riser analysis thus all elements for which combined loading analysis shall be performed must have force storage defined Section 4 19 2 Each analysis are defined by the following input e Structural analysis Select the structural analysis regular or irregular for which the combined loading analysis will be based on e Capacity check Three alternative types of capacity checks are available e Dny 0S F201 Von Mises Stress C 150 13628 7 e DNV OS F201 Selecting this option means capacity check according to DNV OS F201 The following may need to be given Approach LAFD f WSD Limit State f ULS SLS f ALS Functional load
47. d symmetric Section Axi symmetric Non Linear Mesh Density on Segment Pipe Linear Isotropic Mater 1 New Edit existing Sect AxiSym Mass 0 31 tonne m tonne m Pa al stiffness 8117210 KN KN stiffness 237000 kN m 2 kN 2 Torsional stiffness 182000kN m 2 tad IkN m 2 tad Outer diameter 0508m Im Inner diameter J 0 457 m m Radius of gyration y Jom Im lt Calculate F Outer contact diameter Q7 AAA Im Inner contact diameter Q po im me a Axi symmetric cross sections define strength properties of segments They take the following parameters e Mass Mass per length e Axial stiffness Constant axial stiffness force per elongation in the axial direction DeepC SESAM 4 60 01 DEC 2010 Program version 4 5 e Bending stiffness Constant bending stiffness bending moment per curvature e Torsional stiffness Constant torsion stiffness torsion moment divided by torsion angle per length e Outer diameter Cross sectional outer diameter Also used to calculate buoyancy and wave forces e Inner diameter Cross sectional internal diameter Also used to calculate mass of internal fluid if any e Radius of gyration Radius of gyration about local x axis Calculate radius of gyration from specified inner outer diameter by pressing the Calculate button e Outer contact diameter Outer contact diameter for pipe in pipe contact If not specified the cross sec tion outer
48. domain analysis A number of such time domain analysis may be defined for instance one for every bin in a scatter discretization All the analysis can then be executed in batch from the DeepC GUI Each time domain analysis include definitions of e How to calculate the vessel s motion from pre generated time series RAO functions or from a coupled vessel and lines analysis e Response storage parameters what results to store from the time domain simulation e Static simulation parameters load steps sequence accuracy etc e Dynamic simulation parameters duration time step solution method load calculation methods etc 3 1 5 Fatigue For irregular time condition analyses DeepC can perform fatigue calculations by rainflow counting and Miner Palmgren summation Fatigue 1 Component Fatigue lite Years Min 10 Max 10000 fag E 10000 9001 a002 7003 5004 5005 4006 3007 2008 1008 10 DeepC SESAM 3 4 01 DEC 2010 Program version 4 5 3 1 6 Combined Loading Based on regular or irregular time domain riser analysis combined loading capacity analysis may be per formed Available codes are DNV OS F201 and ISO 13628 7 Component Utilization factor sample Min 0 1860247 Max 0 754378 a 0 754328 0 69692 0 639512 0 582 104 0 524696 0467786 0409879 O 3524 74 DO 295083 0273 76h5 0 180247 SESAM DeepC Program version 4 5 01 DEC 2010 3 5 3 2 Post Processing 3 2 1 Static Analysis Resu
49. existing analysis e Analysis Select an analysis Relevant when motion type is taken from another analysis e File Name Specify file name of file containing the motion time series Relevant when motion type is Time series on file e File Type Select that the motion time series is taken from an ASCII or a start times file The ASCII file must be formatted such that the time steps and the X Y Z RX RY and RZ motions have one column each File Type Dynamic Displacement Global Position and rotation of vessel at a given time step 1s found by first putting the vessel in the origin of the global coordinate system Rotations are defined as Euler rotations about the X Y Z axes in a vessel local coordinate system where the origin 1s at the vessel initial position Initially the axes are parallel to the axes of the global coordinate system Rotations about the Z axis 1s performed first then about the intermediate Y axis and at last about the intermediate X axis The vessel is translated out to the given global X Y and Z coordinates The vessel position as defined in the new vessel dia log Section 4 15 1 will not have any impact on the placing Dynamic Displacements Position and rotation of vessel at a given time step is found by first putting the vessel in the position defined in the new vessel dialog Section 4 15 1 then rotating about the X Y and Z axis respectively with the given rotations and at last translating the vesse
50. given for many locations around the globe Modelling the guiding geometry may often be the natural next step in the process This includes defining common geometrical coordinates guide points and guide planes Defining vessels and all their attributes is often practical to do before starting to model the lines since the line coordinates are usually dependent upon the vessel SESAM DeepC Program version 4 5 01 DEC 2010 4 5 e Itis usually also smart to model support points before starting to model the lines since the line end coor dinates will be determined by the position of these boundary points e Lines are perhaps the most time consuming and complex entities to model These include many different properties and coordinates e When the model is complete with respect to the environment vessels boundary conditions and lines one may start to model the analysis These define the execution parameters for Riflex and Simo and binds all the input together e Fatigue and combined loading calculations cannot be performed until the analysis have been run 4 5 Dummy Buoyancy Compensation Force The following section is only relevant for coupled vessel lines calculations 1 e vessel motions will include the effects of the time domain line forces as opposed to calculating the vessel motion from RAO functions only Currently Simo makes the assumption that the buoyancy of a vessel equals the vessel mass This is usually not correct because
51. group Gs 2 Safety Class C Low Formal High Approach Specify LRFD Load and Resistance Factor Design or WSD Working Stress Design Limit state Specify ULS Ultimate Limit State SLS Serviceability Limit State or ALS Accidental Limit State ULS is the only available option when Approach is specified to WSD Functional load group Specify which load group number from the structural analysis to be used to define the functional load step in the combined loading analysis The load step used is the last load step in the specified load group number Section 4 19 3 Specification of functional load group number is only relevant when Approach is specified to LRFD Safety class Specify safety class as Low Normal or High e Von Mises Stress Selecting this option means capacity check according to Von Mises stress criterion The following may need to be given C Mid wall Maximum Usage factor i i Mid_wall Calculation 1s based on mid wall Von Mises stress Maximum Calculation is based on maximum Von Mises stress at inner or outer pipe wall Usage factor Von Mises stress usage factor SESAM DeepC Program version 4 5 01 DEC 2010 4 177 e ISO 13628 7 Selecting this option means capacity check according to ISO 13628 7 The design factor must be given Desigin factor i D e Analysis time window Limit time interval Specify that the time interval to be considered for the combined loa
52. lis Success SESAM Program version 4 5 01 DEC 2010 4 21 3 Show Fatigue Listing File Description Estonia fe aleiz Run Fatigue Analysis set Current Show Fatigue Listing File Edit Contour Color Palette Information Copy Paste Labels Visible model File Edit Format View Help DEEPC FATIGUE CALCULATION RESULTS Version D2 3 10 ime 11 40 07 07 Dec 2004 Fatigue analysis Fatique_Inner_pipe Units Fatigue life is given in years Fatigue damage is given as damage pr i i A i i i TETEE TE we CRU Rr rrr GLOBAL RESULTS Hotspot with shortest fatigue life on line riserl segment Ris Fatigue life 6 50144 Damage percent from different scatter El e E 4 21 4 Fatigue Contour Plot To see a fatigue contour plot Fatigue Result display type must be selected on the view toolbar ae Os Fatigue Result DeepC 4 171 DeepC SESAM 4 172 01 DEC 2010 Program version 4 5 The contour plot is then visualized in the 3D view Fatigue 1 Component Fatigue lite Years Min 10 Max 10000 4g 10000 9001 a002 7003 5004 5005 4006 3007 2008 1008 10 By using the Set Current option the user may switch view of fatigue results between different analyses Description a Fatiquel Fatigue Analysis Lam m ja A I 7 A E Delete A ba Rename Edit Run Fatigue Analysis Show Fatigue R ting File Edit Contour Color Palette
53. on Segment Pipe Linear Isotropic Material Cd Buoy Cd Segment Intemal Fluid Extemal Wrap 4 gt New Edit existing HydrodynamicLoad W Allow edit The input drag force coefficients ie rT eos will normally d calculated as Drag CDA 2 m Bene gee Drag CDY N5 2m 2 CDZ E Added mass AMX Kgl x Added mass AMY Kg x M Use local coordinate system y Added mass AMZ Kol x The drag forces acting on a buoy are calculated according to the following formulae F CDX VRELX IVRELXI Fy CDY VRELY IVRELY F CDZ VRELZ VRELZ where VRELX VRELY and VRELZ are relative water velocities in global local x y and z directions respectively The drag coefficients CDX CDY and CDZ are dimensional and can normally be calculated from the following formulae CDX 5pB Cyy 1 CDY 5pByCay CDZ 5pB Cg p water density By By B projected area for flow in global local x y and z direction Gawi Cay Gaz nondimensional drag coefficients in global local x y and 7 directions SESAM Program version 4 5 DeepC 01 DEC 2010 4 51 Normally added mass coefficients are calculated as AMX pVC AMY pVCEay AMZ pVC p water density T buoy volume Cax Cay Caz 7 nondimensional added mass coefficients If Use local coordinate system is selected the drag coefficients will refer to the local coordinate system of the adjacent element in the segment This option is mandatory for cd buoys
54. should be specified longer than the simulation length of all analysis using the irregular time condition To obtain a reasonable number of fourier components the duration should be specified to at least 1000 seconds Time Step Specify time increment of wave and wave frequency motion To represent the wave surface and motion appropriately Riflex recommends time steps in the range 0 5 1 seconds SESAM DeepC Program version 4 5 01 DEC 2010 4 45 The first tab is where the air parameters are specified Al Wind Sea Swell Current W Include wind Direction Diwind hf Wind profile windProts Wind spectrum NPD Random seed wind 1 e Include wind Specify whether wind forces shall be included This is only a relevant option in coupled vessel line analysis where the vessel motion is calculated in interaction with the lines e Direction Select a direction property for the main direction of the wind e Wind profile Select a wind profile e Wind spectrum Select a wind spectrum e Random seed wind Specify the random seed used when creating wind force time series Wind sea is specified on the second tab Alt Wind Se Swell Current W Include Wind Sea Direction Dinwaves Wave spectrum Jonewap 1785 115 W Spreading Spreading elele Random seed wave 1 e Include Wind Sea Specify whether wind generated waves shall be included e Direction Select a direction property for t
55. specify additional damping on the vessel proportional to the ves sel velocity squared They are defined by e Damping C1 C6 The components of the 6x6 quadratic damping matrix DeepC SESAM 4 104 01 DEC 2010 Program version 4 5 4 15 14 Coupled Vessel Fairleads Vessels Fy semi Dele te raid Rename Vessel Data Vessel Data Vessel Mass Artificial Stiffness Hydrostatic Restoring Linear Current Read Vessel Data Read Vessel Geometry Fields Folder Properties save HTML Report Quadratic Current Wind Force Calculate Retardation Function Linear Damping Quadratic Damping RAO Functions Viscous Force Specified Force Quadratic Transfer Functions The coupled vessel fairleads dialog looks like Support Vessel Given in local body coordinate system Y Existing Fairlead ID X Position Y Position ZPositi n al 1 e et E om aim SSS 2 e m2 75m iom dm 3 m msm om m O a jo oo 2m jom jsm o A A ojos me E ci A a S S caca mo Lines are attached to the vessel in the fairlead points Fairleads are defined by e Existing Names of existing fairleads Equals to Fairlead ID column when the dialog is opened and after Apply Modifications in the Fairlead ID and or X Y Z Position columns will cause the actual fair SESAM Pro
56. structure Objects that are not part of the visible model object set but whose eye is open in the tree are part of Working Set Inactive These objects are visualized with the settings of Working Set Inactive by default invisible Hide Interaction refers to whether the objects shall be drawn or not while you are doing things like zoom pan and rotate With large models these operations may become slow if everything shall be redrawn Line Draw Mode may be specified to draw the risers etc using their center line only as opposed to with the actual cross section Again this option is useful to speed up drawing of large models DeepC SESAM 2 20 01 DEC 2010 Program version 4 5 On the bottom of the settings tab you have the options to store the current settings in the registry View Options General Settings Mouse Model Annotation Diagrams Model lt a Environment e FEM Ab Loads e Structure a Utility Use Save As to store the current settings under a new name Delete to remove the current settings from the registry and Restore defaults to restore the program original settings The next tab is called Mouse View Options Load interface Description Local system Name Mesh density Section Mesh No Elements a Material Thickness Move Up Move Down IY Feedback of nearest point 4 Coordinate feedback f Only when creating Only when creating C Always Always cared tom
57. the browser ws riser C Analysis 9 Capacity 3 Environment ES Ai C Directions EE EDDY_ location E Block_a CJ Soil C water Results Structure Structure Properties Utilities Vessels ig i ig ie 8 main folders exists 1 Analysis Execution parameters for the time domain simulations 2 Environment Data related to wind waves current etc 3 Capacity Fatigue and combined loading analyses 4 Results Time series line plots response spectra envelopes etc 5 Structure Geometric modelling entities like lines buoys stress joints support points etc 6 Structure properties Common properties shared by many structural concepts such as cross sections materials drag coefficients etc 7 Utilities Guiding geometry transformations sets etc 8 Vessels Large floating bodies SESAM DeepC Program version 4 5 01 DEC 2010 2 5 2 5 Context Sensitive Actions Very often the most convenient and easiest way of reaching an action is to right click the relevant object This activates the menu belonging to the selected object objects If you for instance right click a line you get access to all relevant actions and properties of the selected line ia m Move End riser3 i Fan semi fairlead ri2_u Copy amp semi fairlead Ti3_u Delete SQ Supports islands pi re Edit Segments Properties Properties Compute Line Shape Labels j In order to create new objects one
58. their argument list The scripting language Jscript has support for many advanced options like loops user defined functions if statements etc Further information may be found on http msdn microsoft com Search for Jscript A couple of examples look like Create guide points lying along a circle on the sea floor var point angle var radius Length 100m var 3 seafloor Length 600m or point_angle 0 point _angle 36 60 point angle 10 tmp point Point redius Math cos point angle radius Math sin point angle z seafloor Rename tmp point circle point tpoint_angle ff Define a function for extracting drag coefficient from Diameter function findQuadraticDrag diameter 1 diameter 1 0 return 1 0 i diameter 10 0 return 0 0 ff Let the drag coefficient vary linearly from 1 to 0 for ff intermediate diameters return 1 0 disameter 1_0 10_ 0 1_0 gt f Use the function to define segment Morison coefficients var diameter 3 0 var Cdrag findQuadraticDrag diameter segment Morrison Coefficients HydroSegmentForce Cdrag Cdrag 1 0 1 0 2 One should however note that this type of commands cannot be written directly into the command line win dow in DeepC because this window interprets one line at a time and does not understand multi line com DeepC SESAM 2 26 01 DEC 2010 Program version 4 5 mands like the loop statement Instead the user will either have
59. toggled the clipping plane closest to the viewer can be moved by pressing the RMB and drag ging the cursor up down This will enable the user to see inside cuts of the models a Press this button and do rubberband zoom with the RMB e Zoom entire visible image inside the window 3 When toggled the model will continuously rotate z When pressed all graphical objects will redraw themselves e Rotate the model such that you view it from point positive x negative y positive z and zoom all EA Rotate the model such that you view it from the x axis and zoom all al Rotate the model such that you view it from the y axis and zoom all ds Rotate the model such that you view it from the z axis and zoom all 2 7 Selection The selection toolbar looks as follows IERE AL ACTS The buttons have the following usage This button must always be toggled when a selection shall be made If this button is not toggled you ls will not be able to make a selection When this button is toggled single objects can be selected in the 3D window by pointing at them and pressing LMB A rubberband selection is made by pressing LMB outside all objects in the 3D window keeping LMB pressed and releasing LMB when the rubberband encloses the relevant objects A selection is continued by keeping Shift pressed Press this button to select all objects enclosed by a polygon The points along the polygon are define
60. version 4 5 e Start time in wave time series Select the point in the wave time series at which you want the dynamic analysis to start For regular analyses the first tab in the dialog looks like t Dynamic Analysis Options Anakes 1410 D0 Identifier DYNI Description rao dynamic analysis Time domain parameters Number of periods Specification of time step Time step i Steps per period Cancel Apply The parameters are e Identifier Free text e Description Free text e Number of periods Number of periods for regular wave analysis e Time step Specify the time step by giving in a step length The number of integration steps per period will be the value obtained from the step length divided by the wave period and then rounded up to the closest integer e Steps per period Specify the time step by giving the number of time steps per wave period e Ramp duration Duration of start up procedure Dynamic forces will vary from 0 and up to real value during the ramp duration SESAM DeepC Program version 4 5 01 DEC 2010 4 149 The second tab in the dynamic analysis options dialog looks like t Dynamic Analysis Options Anax 11x3 iregular Response Analysis Time Integration and Damping Nondinear iteration 4 Integration procedure Newmark integration operators Beta 0 25 Gamma fos Global damping factors Mass proportional Stiffness proportional Local damping factors Mass proportio
61. will look different if the duration is specified to 3600 seconds as opposed to 8000 seconds Note that the duration should be specified equal to a power of 2 times the time step dura tion time_step 2 n If this is not the case the duration will automatically be rounded up to the nearest power of 2 time steps Also note that the duration should be specified longer than the simulation length of all analysis using the irregular time condition To obtain a reasonable number of fourier components the duration should be specified to at least 1000 seconds e Time Step Specify time increment of wave and wave frequency motion To represent the wave surface and motion appropriately Riflex recommends time steps in the range 0 5 1 seconds e Time Step low Frequency Specify time increment of low frequency motion not currently relevant in DeepC e Wave Spectrum Select a wave spectrum for the wind generated sea e Wave Direction Select a direction property for the main direction of wind generated sea e Use Spreading Specify whether to use short crested sea e Spreading Function Select spreading function e Seed Water Specify random seed used when creating pre generated wave time series e Use Wind Specify whether wind forces shall be included This is only a relevant option in coupled ves sel line analysis where the vessel motion is calculated in interaction with the lines e Wind Spectrum Select a wind spectrum e Wind Profile S
62. 0 1000 1200 Fatigue_outer_pipe riserl Line Coordinate m Fatigue outer_pipe riser3 4 24 14 Plot Utilization Factor E Results vi CL Ana 14x10 DO ine2DPlot riser3 Sample E asanla Erico ic QE th CL Ana 14x10 _D0_2 line2DPlotfriserl Sample JA Flot envelope utilization fatter E A A A D0 2 A E ample Dynamic Results fet CL Ana_142170_045 ine2DPlotnserl Sample Sample Extreme riser Fatigue Results t Dl na Ted DAR line 2M Patrice S arania Gamnle Fvtreme riser H E SESAM DeepC Program version 4 5 01 DEC 2010 4 195 Plot utilization factor along line Jat Graph Window Jm D3 3 0 2 Date 13 Anr 24008 19423532 CombinedLoading Results O a k O o a O ij g o O T N m g DA gt 5 0 200 1000 1200 CL_Ana_14x10_D0_2 risers Sample Line Coordinate m L_Ana_14 10_D0 riser3 Sample DeepC SESAM 4 196 01 DEC 2010 Program version 4 5 SESAM DeepC Program version 4 5 01 DEC 2010 5 1 5 COMMAND DESCRIPTION The command descriptions are provided as a separate HTML file in the documentation for DeepC In addi tion the user may at any time write out a fresh copy of the documentation by typing the following in the command window document c mydirectory DeepC SESAM 5 2 01 DEC 2010 Program version 4 5 SESAM DeepC Program version 4 5 01 DEC 2010 References 1 REFERENCES 1 SINTEF 1998 RIFLEX P
63. 1 e Vessel time series including Particle velocity and wave elevation on vessel distributed force Morison elements Section 4 15 17 Vessel global position Drift forces Wave excitation forces Wind velocity Wave elevation at origin 3 2 3 Fatigue Results Fatigue results include 3D contour plots of fatigue life and 2D graphs of fatigue life along the lines DeepC D2 3 10 Date 20 Dec 2004 14 31 43 Fatigue Life al i a p i pp i E a a i 8 i _ i mal i a o i a i gt i 3 i 1 E 0 200 400 600 S00 1000 1200 Line Coordinate m Center_Pipe riserl Center_Pipe risers DeepC SESAM 3 12 01 DEC 2010 Program version 4 5 3 2 4 Combined Loading Results Combined loading results include 3D contour plots and 2D graphs of utilization factor along riser at Graph Window Jele Deept D3 3 02 Date 13 Are 200 19 45 77 CombinedLoading Results WD a Lh k O 5 gt a O Ej ce o O e N Mm g gt 5 a a00 1000 1200 CL_Ana_14x10_D0_2 riser3 Sample CL_Ana 1 4x10 _DO riser3 Sampl na Line Coordinate m SESAM DeepC Program version 4 5 01 DEC 2010 4 1 4 USER S GUIDE TO DEEPC 4 1 Modelling Concepts Before reading the following sections it may be an advantage to have a basic understanding of some of the most frequently used concepts in DeepC e Vessel Typically a ship semi spar etc Large floating rigid body DeepC
64. 1 DEC 2010 Program version 4 5 The multiple combined loading analysis dialog looks like e ral Combined Loading Analyses Es Analysis template y CL_template Add rows y Analysis table 2 wane _Structrat nai Cpacty check 1 Cltemplate Ana_template Edit DNV OS F201 LRFD ULS Normal 2 CL Ana 14x10 D0 Ana_14x10_D0 Edit DNW 0S F201 LRFD ULS Normal 3 CL Ana 14x10_045 Ana_14x10_D45 lEdit DNV OS F201 LRFD ULS Normal 4 Cl_Ana_14x10_D90 Ana_14x10_090 Edit DNV OS F201 LRFD ULS Normal EE EE DNV OS F201 LRFD ULS Normal CL Ana 14x10 D180 Ana 14x10 D180 Edit DNV OS F201 LRFD ULS Normal ce toe This dialog is used to create and edit multiple combined analysis objects Each row in the table defines one analysis Using this dialog make it efficient to create new combined loading analyses based on an analysis template Before this dialog can be used at least one combined loading analysis must exist e Analysis template Select an already existing analysis that will used as a template for the analysis to be generated 1 e capacity check analysis time window etc will initially be taken from this analysis but may later be edited e Add rows Press this button to add more rows in the table If one or more structural analysis are selected in the browser one new row for each selected analysis will be added into the table e Name Name of analysis object Press the heading in this column to automa
65. 2936608 kh 150 aeg 0 240152 1s 1 40509025 Ha OWNS Zn 20 nO sD 19 20785171 7 60deg A kN s 1 5617 0 kN s 2 m 116 0053501 kh amp 70 deg an kN 2 2 1 62999799 kN s 0 kN 2 m 2 0 kN 3 2 m 0 kN s 2 m 104 6183218 kh 9 80deg 0 0825152 kN s 1 65295571 kN ra ca Owe 89 67284728 kh 10 90 deg la kN s 1 65295571 kN 2 0 kN s 2 m 2 0 kN 2 2 m 0 kN 2 2 m 79 70919758 kh 11 100 deg 0 043105 kN 2 2 1 62 KN s 0 kN 2 2 m 2 0 kN 2 m 0 kN s 2 m 73 65983884 kh 110 deg 0 123157 KN s 2 1 56112404 kN 0 kN 224 mr2 0 kN s 2 m 0 kN 4 m 66 1610157 kh Ari Ahri ala a A MNA leb aA A Pee Lb AN Li ALA Ln Aid A A re mar a A AN ok m Wind force coefficients are used to calculate wind forces on the vessel The following parameters must be specified e Wind force area Equivalent cross sectional area of the vessel structure above waterline e Reference height Height from which wind velocity shall be taken e Symmetry Specify whether the current coefficients shall be mirrored for symmetric current directions With double symmetry specified current coefficients must be specified for headings ranging from 0 to and including 90 deg With single symmetry coefficients must be specified for headings ranging from 0 to and including 180 deg With no symmetry coefficients must be specified for headings ranging from 0 to and including 360 deg coefficients at 360 deg must equal those at 0 deg e Heading Wind direction to which wind coeff
66. 3 2 14 2 15 2 16 Table of Contents INTRODUCTION Sita EN cece ees 1 1 DeepC Deep Water Coupled Vessel Motion Analysis ccccccccccccccnnnnnnnnnnnanannnnonn nono nnnnnnononons 1 1 DeepC in Tae SESAM y Mrs 1 1 How to read the Manta at 25 ac sansacssasonsscasoses n a E O 1 2 Acronyms frequently used in the Manila dic 1 2 Satus Dist AS 1 2 APPLICA TION FRANEN OR Boe sssccccssescecerassseecaisissceuesesvesancaeaesateaswnetsetsaeeensdsiseensiesscees 2 1 Gia ON Geo cuts ea bor O cepts ieee Re or Sry ee UR A tee cae ae Ee 2 1 o ss A 2 1 Application os A A 2 3 Data Oran ae 2 4 Context sensitive ACUON Srila 2 5 Graphical Interact 2 6 A O 2 7 27 Apply Property 10 Sel ECU ad 2 8 ale Maco Same epee eR E ROR E E nn dS tai 2 9 A rac date soon aca E A EAA E E A N 2 11 REDOR IE e nn o elo 2 12 COD PaE Messrs alee ade ase SS ences oc ee 2 13 SOPA a 2 14 ColorCode propecia rain 2 15 VOV 6 B10 1 kc A OC OR RP ee ee RO a eR E 2 16 O a asec cans darters A a Lada ata al Ua hla a hard S 2 22 27 2 18 2 19 2 20 221 222 223 3 1 3 2 4 1 4 2 4 3 4 4 4 5 4 6 4 7 O RS E 2 27 Graph COROLA 2 28 EFC ONTO greene mcr meer N E eer AC ce ren OD ara Somer an A TO MS Tee OTP re 2 30 SVEP A CELA MICS estrada 2 31 VOICE AA AA deca T TAN 2 31 NORCO shoes said seas eters pecans dial oe 2 32 REATURES OR DEE PC iiiececccrencssscsvacsacesescecessshesasossdacisorsuncssscsnsssceasuetacocstaasiocesiaciaerseessee 3 1 Kode MNE e Sere t
67. 44 7032 5249 30 fesm S978 2559 3506 2989 4 fm 2 a jz jms 1599 1522 5 caca mo Selecting regular means a H T diagram is created selecting irregular means a Hs Tp diagram is created Wave height significant wave height intervals are specified in the first column For a given row the wave height significant wave height interval goes from i e starts from the value in the given row and goes up to the wave height significant wave height in the next row In the above given table the first interval goes from 0 5m to 1 5m the second interval from 1 5m to 2 5m etc Period peak period intervals are specified in the first row in a manner similar to the wave height significant wave height intervals The remaining cells contain the number of seastates with wave height period or significant wave height peak period within the given intervals DeepC SESAM 4 32 01 DEC 2010 Program version 4 5 4 11 18 Scatter Dicretization H E Environment 13 Air EJ Directions BE EDDY location E Block_4 HA Aeqsc Rename 3 Soil Delete Water Results 3 Structure Information 3 Structure Prope Utilities 4 53 Vessels Copy Paste Edit Depending on whether you have used a regular or an irregular scatter diagram you will get a H T or Hs Tp scatter discretization The scatter discretizations are in all senses identical but they are used to create either regular or irregular waves and time condi
68. 5 01 DEC 2010 4 167 If 3D animation results has been stored when performing the dynamic analysis Section 4 19 4 then it is possible to start Xtract directly from DeepC to view the animation 4 20 Capacity Check Data Organization The capacity folder consists of the fatigue analysis and combined loading analysis folders containing fatigue and combined loading analysis objects respectively 9 ws_ip 13 Analysis ECL_ naReg_14 5 D0 Combined Loading Analysis 13 Capacity tz CL AnaReg 14 10 DO Combined Loading Analysis 3 Combined Loading Analysis EzE CL AnaReg 14810 D45 Combined Loading Analysis 13 Fatigue Analysis ECL_AnaReg_ 14 10 D90 Combined Loading Analysis a Environment tz CL AnaReg 14 10 D135 Combined Loading Analysis Aes lke heo RH TALI EAN eee bie ee ee A A E 4 21 Fatigue Analysis 4 21 1 New Fatigue Analysis DL Analysis Capacity C Combined Loading Analysis 2 Fatique Analy Ml iadi bill E Results Run Fatigue Analysis 3 Structure E3 Structure Propertii ll Activities Dialog 3 Utilities Paste J Vessels Fields semi i save HTML Report DeepC SESAM 4 168 01 DEC 2010 Program version 4 5 The new fatigue analysis dialog looks like Defines Fatigue Analysis BD ene Edit existing Fatiguel C Regular Iregular Q Scatter discretization 72 Add Selected Time interval Number of periods Start time s z En
69. AA A A A od 4 166 Capacity Check Data DES Mz ON A 4 167 IS AAA o a a caso neato 4 167 AD Nels NENA A dodo 4 167 42122 RF at Oe Analysis tadas 4 169 A ZN SWOwW Fate TAs tit OP de is 4 171 ADM Tals Ue Contour lona 4 171 4215 Adie Contour Color Palco dd lie odia 4 173 Combined Loading A cani 4 174 4 22 1 New Combined Loading Analysis ooocnnnnnnnnnnnnooooonooonononnnnnnnnnnnnnnnnononnnnnnnnnnnnnnnnnnnnnc cnn nos 4 174 4 22 2 Multiple Combined Loading Analysis ooooonncnccooonononooocnnonnnnnnnnnnnnnnnncnnnnnnnonananannnnano non nnos 4 177 422 3 Run Combined Loading Analysis iu aaa ae ee 4 179 A224 Show Combined Loading Listing Ple li 4 180 422 5 Combined Load Contour Plot alii 4 181 Results Data Ore anizaO Midis 4 183 Results Dalai PES A A airis 4 184 4 241 Display ELO DAD O da 4 184 A AC E AO EAA E OA OEO 4 185 AQA A a A 4 186 AQAA Paramete Grap Moeun a a A 4 186 AJAS Compute PEC T TEN E E E iaaeaess 4 187 AAG LOV Pass le decida 4 188 4 24 7 Compute Probability Distribution cconnnnnnnucucunooonononononnonnnonnnnnnnnnnnnnnnnonnnnnnnnnnnnnnnnnnnnnnns 4 189 ADA SS Ranse MAI da rt 4 190 ADA S Ranse Mean StA Yora E cnet nea areata E E airmen sn 4 191 Be DAW AA S AIS O ceo 4 192 ALZA Select Result COORG VALE as E 4 193 AAW Select Resul Componerse AA ANAA N eee 4 193 ADA WS POLE QUISE AE E btu E A AAA ETES 4 194 A 2A TF POCU OAN Fac Oio A I E A 4 194 5 COMMAND DESCRIPTION sound 5 1 REFERENCES SESAM DeepC Program version
70. Element_1 Te eae eine irl HF _Line _ chain _upper Elenj E a 2 Filtered Time Series fh HF_Line7_chain_upper_Ele pee i Line Time Series et LF Lined_chain_upper_Elen Rename i O r LF_line2_chain_upper_Elen Display Graph Ly spe et LF_Line3_chain_upper_Flem as Graph E Vessel Time Series et LF_Line4_chain_upper_Flenea as e Fatigue Results et LF Line5_chain_upper_ Element E Te Filtered _For H Static Results et LF_Line _chain_upper_Flement_i_Te Filtered_For SESAM Program version 4 5 01 DEC 2010 DeepC 4 187 Two time series must be selected to create a parametric graph For each step in the time series the value of the first time series determines the x axis value and the value of the second time series the y axis value Par ametric plots can be used to spot dependencies between variables Jat Graph Window Jele 22 510 Date OF Dec 2004 1422025 Element 1 vs Element 2 MomentOfForce N m 390000 4 24 5 Compute Spectrum Results Dynamic Results Distributions 29 Filtered Time Series 239 Line Time Series 23 Range Curves Spectra E Vessel Time Series H Fatigue Results 1 09 Static Results 110000 MomentOfForce N m 100000 Delete at Rename Pet rise ni rise Compute Spectrum WA riset Low Pass Filter I riset Compute Probability Distribution et rise trt rise Display Graph Parametric Graph DeepC 4 188
71. Information Copy Paste Labels Visible model SESAM DeepC Program version 4 5 01 DEC 2010 4 173 4 21 5 Edit Contour Color Palette Rename Edit Run Fatigue Analysis set Current Show Fatigue Listing File Edit Contour Color Palette K Information Copy Paste Labels Visible model The Edit Color Palette dialog looks like My elie Coley Dalar iW Specify max value li 0000 M Specify min value li 0 OF Cancel In order to highlight the values of interest it is possible to adjust the ranges and colours of this palette The min below which all elements will be colored by the bottom colour and max above which all ele ments will be colored by the top colour values can be manually specified or taken from the data DeepC 4 174 01 DEC 2010 4 22 Combined Loading Analysis 4 22 1 New Combined Loading Analysis po ha 3 Fatigue Analysis Environment Results 03 Structure 5 3 Structure Properties 53 Utilities 09 Vessels semi Multiple Analysis Run Combined Loading Analysis All Activities Dialog Paste Fields save HTML Report SESAM Program version 4 5 SESAM DeepC Program version 4 5 01 DEC 2010 4 175 The new combined loading analysis dialog looks like WY Comets Loading Ae 2 f New Editesisting CombinedLoadingz I Allow edit Structural analysis y Ana x5_1145 y Irregular Capacity
72. New Buoy New Ball Joint New Support Labels j Fields Folder Properties save HTML Report SESAM DeepC Program version 4 5 01 DEC 2010 4 121 The stress joint dialog looks like La Define stress Joint gt f New Edit existing StressJointl W Allow edit M Internal fluid oi Properties Hydro coeffs Ed segment hyRiser Line end positions End 1 semifailead 1i3_u alobalPoint End 2 liserl end2 Points distance 20 m m Segment definition g 4 Top seg ment NoE lt fost spn 0 Seci ndCone1 _NoElements1 3 Bottom_segment S sectEndCones NoElements1 caos em Stress joints are used to model lines with linearly varying pipe cross section Stress joint Each element on a stress joint segment will be modelled with constant cross sectional values taken from the centre of the element Stress joints are typically used to model the top riser connection on to the vessel e Internal fluid Select an internal fluid if any to represent the fluid content of the stress joint e Hydro coeffs CD segment Hydro dynamic coefficients to be applied for all segments on stress joint e Endl 2 Defines the stress joint end connection points One end point is typically a fairlead on a vessel and the other end is typically a line end point The end points may also be the end point of other lines or stress joints e Points distance This is a read only field automatic
73. PORE RTD er See Tenner 4 51 MeN DS IN A AA E 4 53 4 1394 Marne TOWN niasnandee means a 4 55 ALS Langarisotropic Maternal cise ieee eras iO 4 56 ASO MES DES dis 4 57 4 13 7 Mesh Number of Elements tciccsvsesicsvecvseclsansccnssvecetnvccceieacelinisenleaeetioiaeliea elena 4 58 ALS SC CHOM ARIES VIMEO alado ista 4 59 4 1397 Section AxieSymmetric Non LI di tac 4 60 2d Bs O Secon PIPE meee o ee eco Ce ea ere N eee 4 68 A VSL SC CUCM End CONE a sed aise easiest E E E es sae 4 69 4 13 12 Section ide 4 70 A y erna kP meer ene rr ren Pe sio 4 72 Ac AA COmipOnent BUOY ye doi cs sad as scah oa encase 4 73 AA AAA ts a tetas asangies 4 74 A135 1G Pipe AA ihe as acs eared team en olan st 4 75 AS MESS Concentration Facon cusses hess eee erate nae cds sane teens bmeseeeomaeianetene 4 77 AN ed 4 78 ALSO SECUOMs Siess Prde LEIS e 4 80 4 1320 Material Combined Ad e a 4 81 4121 Pipe Combined TO AGI erriren na A 4 82 213 22 Fud COMA GLO AiG E da dato 4 83 4 14 Vessel Data Ore ani zanntis dt aa 4 85 AND VSSSel Data IS ais 4 85 A A vepeibesaad a aaa a a a 4 85 A Read Vessel AAA O nO O 4 86 A Read VES ECON oe 4 87 ANSE Vessel DA a ha iecentens 4 88 A A ween A 4 89 ALSO Areal e e de tee a os Sie 4 91 ATST Hydrostatic Resto 4 93 AS Linear Current wenera ae a E 4 94 ASS Quadra Curent oa N NEA N 4 96 EII id OL E aa E EES E O A 4 97 A A See WI VEER Ce AOE Ne LATA CT OOS coiir E AE EA a ce gaat 4 99 AAA Mea ar Ue AOS ideas 4 101 ASAS UA O Wai
74. Pierson Moskovitz E E Environment E CurProf2 Current Profile a x E Air E CurProf3 Current Profile f i Jonsi Jonswap Spectrum i Jons2 Jonswap Spectrum In Jons3 Jonswap Spectrum Properties x5 L Jonswap oa Wave Spectrum New Jonswap 3 Parameter New Spreading Function New Jonswap 5 Parameter New Current Profile New Pierson Moskowitz 1 Utiliti New Bretschneider Ly Vessg New User Spectrum Fields Folder Properties Save HTML Report The Pierson Moskovitz dialog looks like LA Create Edit Wave Spectrum Jonswap 3 Jonswap 5 Fierson Moskowitz Bretschneider User spectrum New Editexisting WaveSpectrum2 W Allow edit om Eleh m Deept D230 PrarsonMoskovitz Spectrum 0 1315725542 r rad s O cr O O o S T O 5 WavePeriodT20 25 30 35 Cancel Apply Pierson Moskovitz spectra are defined by the following formulae S O Ao exp P w 0 lt w lt A 0 0081 gf B 3 11 H SESAM DeepC Program version 4 5 01 DEC 2010 4 21 e Significant wave height H Equals 4 sqrt mg where m is the variance of the wave displacement time series Approximately equal to the average of the highest one third of the waves 4 11 10 Bretschneider 2 Parameter Pierson Moskovitz E a r A L FaU Ee m A 9 spread Cosine Spreading Function i Swell_ spec Jonswap Spectrum i Wave_spec Jonswap Spectrum i
75. Rotate around closest object R 0G 0 B 0 false R 255 3 755 B 255 Tahoma MS Reference Sans Sent off false Folder 10 false false 1 absolute R255 G 255 B 255 Folder Curent background Screen ha OF Cancel Apply Double click entries in the left most column of the list to change their value One should note the toggle but ton Rotate around closest object View Options Selection ary Color O Bounding Box faColor A ComboBox Font Touched by rubberband M Advanced snap we a pens R 0 G 0 6 0 false R 255 G 255 B 255 Tahoma DeepC SESAM 2 18 01 DEC 2010 Program version 4 5 With potentially large water depths the total span of your model including vessels and lines can be sub stantial When rotating the image in the 3D window you usually rotate around the center of the model This can be inconvenient if you have zoomed in on the vessel or other details By toggling Rotate around closest object you will instead rotate around the object that 1s under the cursor when you start the rotating action The second tab contains settings on the different object types View Uptions General Settings Mouse Model Annotation Diagrams H Ervironment R 115 6 115 5 140 Fatigue O Transparency MEA EE FEM gt E Loads E res Structure E Ball Joint ap Buoy E E Color code legend I te Line o ff Color e E Transparency E Stre
76. Section 4 15 3 Specify fairleads Section 4 15 15 01 DEC 2010 DeepC 4 7 On simplified motion vessels override specify RAO functions if those read in read vessel data are not to be used Section 4 15 16 Specify all remaining types of vessel data on coupled vessel line motion vessels vessel data vessel mass artificial stiffness hydrostatic restoring linear current quadratic current wind force retardation func tions linear damping quadratic damping viscous forces specified force and quadratic transfer functions Section 4 15 5 4 7 4 Boundary Conditions a Create support points Section 4 17 10 4 7 5 Lines l Create Cd buoy Section 4 13 1 Create Cd segment Section 4 13 2 Create external wrapping Section 4 13 3 Create marine growth Section 4 13 4 Create materials Section 4 13 5 Create mesh densities Section 4 13 6 Create mesh number of elements Section 4 13 7 Create sections Section 4 13 8 Create pipe in pipe contact Section 4 13 16 Create internal fluid Section 4 13 13 Create component buoy Section 4 13 14 Create rotation hinges Section 4 13 15 m Create stress concentration factors Section 4 13 17 DeepC SESAM 4 8 y Z 01 DEC 2010 Program version 4 5 Create SN curves Section 4 13 18 Create section stress parameters Section 4 13 19 Create material combined loading parameters Section 4 13 20 Create pipe combined loading parameters Section 4 13 21 Create fluid combined loading parameters
77. TML Report f New Editexistina WindSpectrum1 W Allow edit Frequency parameter pa Surface layer thickness Im x Surface friction coefficient A Cancel Apply Wind spectra are used to calculate forces on vessels in coupled vessels lines analysis Wind spectra and wind profiles are used in combination to describe the wind The API wind spectrum is typically used to rep resent typhoon wind conditions It uses the following parameters e Frequency parameter Typical value 0 025 e Surface layer thickness Thickness of layer with high velocity gradient Typical value of 20m e Surface friction coefficient Surface drag coefficient used for transverse gust spectrum SESAM DeepC Program version 4 5 01 DEC 2010 4 13 4 11 3 Davenport Wind Spectrum Wind Profile Tof Wind Profile Properties New NPD New APT New Davenport New Wind Profile Paste Fields Folder Properties Save HTML Report a a lite The Davenport wind spectrum dialog looks like f New Editexistina WindSpectrum1 M Allow edit Dim Reference length m x Surface friction coefficient A Cancel Apply Wind spectra are used to calculate forces on vessels in coupled vessels lines analysis Wind spectra and wind profiles are used in combination to describe the wind The Davenport wind spectrum is typically used to represent typhoon wind conditions It uses the following
78. W Enable interactive undo marks History list Show only interactive make Show only user defined marks tariname Userdefned 1 readCommandFile Interactive 2 Interactive 3 Modify StressProp Interactive 4 Modify SNCurvel Interactive Press the Undo and Redo buttons to step through the command history When a workspace is saved the Undo Redo history will be deleted DeepC SESAM 2 34 01 DEC 2010 Program version 4 5 SESAM DeepC Program version 4 5 01 DEC 2010 3 1 3 FEATURES OF DEEPC DeepC performs through the Marintek programs Simo and Riflex a non linear large deflection time domain analysis of the motion of a floating system The lines tension legs mooring lines risers etc may be arranged in any arbitrary configuration including branches vessel to vessel lines etc 3 1 Modelling 3 1 1 Vessels Any number of vessels may be modelled and employed in the analysis multi body vessel analysis with ves sel motion dependent on the lines requires the multi body extension of Simo Vessel modelling can include Body mass centre of gravity and centre of buoyancy Frequency domain floater characteristics read from a G1 SIF file generated by HydroD Wadam Response amplitude operator Ist and 2nd order excitation forces Added mass Potential damping Hydrostatic restoring forces Linear and quadratic lumped vessel current coefficients Linear and quadratic lumped vessel damping coefficients Lumpe
79. a Information Vessels Copy Paste Fields Folder Properties save HTML Report The multiple irregular time conditions dialog looks like Define multiple irregular time conditions regular time conditions y Jasa on He Tp Name Duration Time Ste Tine Step bw Frequency Wave Spector Tonswap_Tx _1 2 575 Bint 75m Jonswap_Tx _15x6 Jonswap_17x _11x 4 _ Bt7xs Bint 17 5m19Ss CB17x 16264 8 18 18 lomewap 176 18 The purpose of the table in this dialog is to define irregular time conditions wave wind and current param eters for each bin in a scatter discretization i e the scatter discretization from which the dialog was acti vated Each such irregular time condition will later be used to define the environment parameters of a time domain analysis The table has the following columns e Block Scatter discretization block e Bin Bin within the scatter discretization block SESAM DeepC Program version 4 5 01 DEC 2010 4 39 e Hs Significant wave height of scatter discretization block e Tp Peak period of scatter discretization block e Name Specify name of irregular time condition By pressing the uppermost row in this column all names are filled in automatically e Duration Specify duration of pre generated wave time series The fourier components of a pregener ated wave time series is dependent upon the duration This means as an example that the first 100 sec onds of a wave time series
80. ally updated by the program showing the distance between endl and end2 A user may copy the value in this field select with left mouse button and press Ctrl c and paste into one of the segment length fields position the cursor in one of the segment length DeepC SESAM 4 122 01 DEC 2010 Program version 4 5 fields and press Ctrl v specifying the segment length as the distance between end1 and end2 multiplied by some value Length L 1139 526477 m 1970 0756484 0 35 m Name Name of stress joint segment Length Stress free length of stress joint segment 1 e the length of the segment if it was placed in grav ity free vacuum with no external forces applied to 1t Section Segment cross section property Section 4 13 11 Number of Elements Number of elements property Section 4 13 7 Material Segment material Section 4 13 5 4 17 4 Stress Free Coordinates 5 Struct C Be New Line C BL New Stress Joint WE Stress Free Coordinates NS E oe Show Stress Free Configuration E Ld ane Hide Stress Free Configuration ly Vessel New Buoy New Ball Joint New Support Fields Folder Properties save HTML Report SESAM DeepC Program version 4 5 01 DEC 2010 4 123 The stress free coordinates dialog looks like 8 Stress free coordinates gt rp Project on 41 plane Calculate oe Calculate Connected Oe View stress free configuration Length oistance Calc Ena 1
81. ame Vessel Data p Vessel Data EPS Vessel Mass w As ns a Artificial Stiffness Read Vessel Geometry l a Hydrostatic Restoring Fields Folder Properties Quadratic Current h Save HTML Report Wind Force Calculate Retardation Function Linear Damping Quadratic Damping Fairleads RAO Functions Viscous Force Specified Force Quadratic Transfer Functions SESAM Program version 4 5 01 DEC 2010 The linear current dialog looks like ey suppone Vessel Symmetry No symmetry Linear Current Coefficients 4 reacia Curent ci Current C2 Current C3 Current c4 Current C8 Currence a Jodeg okem 0 kw sim 0 kisim ORNs ORNs 20 deg O KNsim OKNsim OKVsim Oks OKN s 0 ks Okiem OKNsim O kim Oks Ons OK Ows o ks OkWs Jotas ms OkWs 0ks ms OkWs 0ks ts ts ts tg s i o a 3 40 l 0 2 d un g g o Esi a ui 2 E z i o EL Ga ala HH ra z ii ab 2 0 z g 0 KN s z Esi Okem oks OKs 0 ks A z in deg OkN sim OkN sim OkN sim OKN s OKN s 0 KN s O kisim 0 kin m OKN s 0kNWs 0N 00 deg 0 kNsim_ O kN s m OkNsim OkN s OKW s OKN s 110 deg 0 kN s m OkN s m OkN s m 0 kN s 0 kN s 120 deq 0 KN s m 0kN m OKN s m 0 kN s 0 KN s Em o ga 10 n aja z L DeepC
82. an ilar th IAS set Current Response Storage Static analysis Options Dynamic analysis Options Export Execute Analysis View Static Configurations Start Xtract Response Post Processing Read All Results Read Static Results Read Dynamic Results Read Vessel Results Information Copy Paste This action will read dynamic analysis results into DeepC and must be performed prior to viewing dynamic results DeepC SESAM 4 162 01 DEC 2010 Program version 4 5 4 19 10 Read Vessel Results decay Rename Y release Edit Set Current Response Storage Static analysis Options Dynamic analysis Options Export Execute Analysis View Static Configurations Start Xtract Response Post Processing Read All Results Read Static Results Read Dynamic Results Read Vessel Results h Information Copy Faste This action will read vessel results into DeepC and must be performed prior to viewing static or dynamic vessel results Vessel results can only be read for a coupled motion vessel SESAM Program version 4 5 4 19 11 Read All Results This action will read static dynamic and vessel results for a particular analysis into DeepC 01 DEC 2010 Mame Description Environment y Aria NENA lrranul ar alt E decay Rename Y release Edit set Current Response Storage Static analysis Optio
83. analysis Press the heading of the column to invert the selection in all rows Similarly by pressing the first column in each row all selections in the row will be inverted e Input Results Simo Static Results Riflex Static Results Riflex Dynamic Results Press the buttons in these columns to view edit the result listing files e Scan Result Files Press this button to scan all result files for the given row Number of warnings and errors will be annotated on the buttons Riflex Static Resull e Scan All Result Files Press this button to scan all result files for all analysis listed in the table e Run Analysis Press this button to run all analysis that have been checked in the table 4 19 8 Read Static Results Name Description _ Environment yA Delete anim HRD y decay Rename Mrelease Edit Set Current Response Storage Static analysis Options Dynamic analysis Options Export Execute Analysis View Static Configurations Start Xtract Response Post Processing Read All Results Read Static Results Read Dynamic Result Read Vessel Results Information Copy Paste SESAM Program version 4 5 DeepC 01 DEC 2010 4 161 This action will read static analysis results into DeepC and must be performed prior to viewing static results configuration 4 19 9 Read Dynamic Results Mame Description Environment rr
84. anker Line dependent coupled motion Simplified motion Vessel initial positiorr f 00 40 2 Vessel onentation about local axis O deg Vessel onentation about local axis 3 deg Vessel orientation about local axis 49 deg caca men Vessels are typically large body free surface floating rigid structures To create a new vessel one has to go through the new vessel dialog that defines the following parameters DeepC SESAM 4 86 01 DEC 2010 Program version 4 5 e Line dependent coupled motion Vessel motion is calculated in the time domain simulation where the nonlinear effects from the line forces are included e Simplified motion Vessel motion is calculated either from vessel RAO functions or pregenerated time series e Vessel initial position Specify location in 3D space of vessel origin The vessel geometry will be trans lated according to these coordinates and the origin of the vessel local coordinate system 1s defined at this position e Vessel orientation Specify Euler rotations about the X Y Z axes in a local coordinate system The origin is at the vessel initial position and initially the axes are parallel to the axes of the global coordinate sys tem Rotations about the Z axis is performed first then about the intermediate Y axis and at last about the intermediate X axis 4 15 2 Read Vessel Data Vessels fg Spr Delete Rename Vessel Data R
85. ations have to be made in HydroD regarding the use of a Morison model i e use a Morison model as you would have done if you should not run DeepC subsequently The Morison model should be defined such that the RAO functions become as realistic as possible DeepC SESAM 4 4 01 DEC 2010 Program version 4 5 In a coupled vessel line analysis in DeepC it is generally recommended not to include a Morison model in HydroD and only use the viscous force elements of DeepC The following items should at least be consid ered if deciding to use a Morison model in HydroD Added mass and viscous damping from the Morison model will not be transferred into DeepC Excitation force transfer functions from HydroD Wadam will include contributions from the Morison model opposite added mass and viscous damping Drift forces are calculated in HydroD Wadam based on the RAO functions This means that the drift forces transferred to DeepC are depending on whether Morison elements are included in HydroD or not 4 4 Modelling Overview in DeepC Guiding Geometry y 4 Boundary Conditions 4 Analysis a The above figure gives a suggestion as to what is the natural order in which to model objects in DeepC More experienced users will of course jump to and from these tasks in different order Environment modelling is the first item on this list It includes definitions of wave wind seabed scatter diagrams etc Environment data may be
86. ave HTML Report Vessel Data Vessel Mass Artificial Stiffness Hydrostatic Restoring Linear Current Read Vessel Data Read Vessel Geometry Quadratic Current Wind Force Calculate Retardation Function Linear Damping Quadratic Damping Fairleads RAO Functions Viscous Force Specified Force Quadratic Transfer Functions F Amplitude and phase Real and imaginary Surge Sway Heave Roll Pitch Yaw oseo J oseo ow 20943 0 9422518662 89 81991318deg 0 8164266118 E azedo sorsas 9 707755 ds O 0 8073761767 E 79048302 deg 0 8047656369 89 7874 ergo 9254083005 39 T5708 de 0 B019535995 097008 023710 0 8219624965 89 77624675 deg 0 7890453954 89 7730 0 TEB66 146 ag 89 7650 0 24639 0 9143786613 89 7602 j 0 7925594328 89 7567 NN ee ae 89 7480 o gs64q0 90S7274167 9 74246104 deg 07651627981 69 7389 zero suo 8075285083 da E E 0 26734 05957026445 80 72280195 deg 07766775838 897194 zon 9727s aeo ui 89 7092 e eoooezs2 serene 59 5994 07813780824 395008 a 09 60041946 0 7554 89 8173 89 6119 89 8063 89 2003 89 7940 0 831215744268 El 30 def 89 6847 DeepC SESAM 4 110 01 DEC 2010 Program version 4 5 RAO functions may be used to calculate the vessel motion vessel motion calculated independent of lines When a G SIF file is read in Section 4 15 2 the RAO functions will be
87. be an odd number Spreading functions are used to describe wave energy density as a function of heading for long crested waves Both swell and wind generated waves may include spreading Relevant parameters for the spread ing function are e Exponent Power of the spreading cosine function e Number of directions Number of directions employed when wave components are generated for the time domain simulation 4 11 15 Current Profile FF CurProfz E E CurProfz 9 Directions h Jons1 dE EDDY_location h Jons2 9 Soi Ii Jons3 Properties Wave Spectrum New Spreading Function New Current Profile Paste Fields Folder Properties save HTML Report SESAM DeepC Program version 4 5 01 DEC 2010 4 27 The current profile dialog looks like MWA arana dir Current Urol f New UC Edit existing CumentProfile4 4 Allow edit Specify profile Yr 0 deg 0 945 mis 0 345 mis osm odes 02m 639 13m 0 deg 0 122 ms SS Cancel Together with a direction property current profiles define current velocity and direction at given water depths Current profiles are defined by a set of the following parameters e z Z level at which the given direction and velocity shall apply e Direction Counter clockwise direction This direction is added to a direction property defined in irreg ular time conditions Section 4 11 23 to define the actual current direction e Velocity Current velocity L
88. bin in the given block Each bin must be assigned a name and a probability within the scatter block not to be confused with total probability of the bin which is given by the probability within the block multiplied by the probability of the block in the complete scatter diagram If a user wants to divide the scatter diagram into blocks of constantly spaced Hs and Tp steps it may be a good idea to use the Auto fill all button Remove active block y Auto Fill tools v Auto fill name Hs Tp we Delta Ha 3 mn Delta Tp 3 z Auto all Ww When pressing this button the scatter diagram is divided into blocks with given steps of Hs and Tp values Block names Hs and Tp values are filled into the top table It is possible to change the colour used for the different scatter blocks by pressing the colour buttons in the top table Block Name Color Active Ha C 1 B1x5_4 15m 4 2 B3x5 6 E 3 3 m 6 4 R3x5 a rr 45m a If one wants to completely remove a block it must be set active use the Active column in the top table and press Remove active block Define blocks 4 Insert new block Ww Remove active block 2 len ld Dra lr dal Auto fill tools DeepC SESAM 4 36 01 DEC 2010 Program version 4 5 4 11 19 Multiple Wave Spectrums Environment MT CB17x5_19x5 Irreg 1 CB7x5_11x5 Irreg tee CB7x5_19x5 Irreg Eu fag Directions El a EDDY_location Rename Delete ud Mu
89. c Results Dynamic results include 1000 1200 Line Coordinate m DeepC 3 7 DeepC SESAM 3 8 01 DEC 2010 Program version 4 5 e 3D animations of vessels and lines displacement with contour color of forces or bending moments on the lines These are displayed in Sesam Xtract e 2D plots at element ends of the following time series Effective tension Deepc DHIE Date 20 Oct 2004 11405 riser Riserbinch Element 1 Te Force H 80000 100000 120000 60000 0 20 40 60 a0 100 Time 5 riseri Fuber inch Element 1 Te Meam 315546 Sid 12410 Mit 50435 Mac 11994 Start O End 99 75 Sep 025 Bending moment about local y and z axis Resulting bending moment SESAM DeepC Program version 4 5 01 DEC 2010 3 9 Decomposed line end forces in global X Y and Z direction Nodal displacement in global X Y and Z direction Element curvature e Cumulative distributions of all types of time series DeepC W201 Date 17 Deo 2008 10 23 20 riserl Riser6inchBottom Element 14 Te 1 Probability ae DO Oe a 14 mS 106 0 DADA 0000 90000 100000 110000 120000 130000 140000 riseri_RiserbinchBottom_Element_14_Te 3 parameter Weibull fiti Scale 21178 3 Location 79130 9 Shape 1 69025 Ordered Force Response KH riser RiserbinchBottom_Element_14_Te Sample Cumulative Distribution Function e Cumulative distribution function on Weibull paper of all types of time serie
90. c equilibrium configura tion In order to calculate this rotation the stress free and static equilibrium configuration of the line that shall be connected to the support point must be considered Specify rotation Select this option if you manually want to specify the support point rotation Calculate from angle with global XY plane Let DeepC calculate the rotation based on the stress free configuration of the line that is later attached to the support point and the desired angle of the line with the XY plane in static equilibrium condition SESAM DeepC Program version 4 5 01 DEC 2010 4 131 e Direction Counter clockwise angle in the global XY plane A rotation axis for the support point from stress free to static equilibrium condition is defined by the global Y axis moved by direction in the XY plane rotation direcion e Rotation The support point will be rotated around an axis defined by the global Y axis rotated by direc tion in the XY plane The magnitude of the rotation around this axis is defined by Rotation e Angle with global XY plane Specify the angle between the global XY plane and the line end in static equilibrium condition If the support point lies at the upper end of a line the angle is defined positive below the XY plane Conversely at the lower end of a line the angle is defined positive above the XY plane 4 18 Analysis Data Organization The analysis folder contains nonlinear analysis objects
91. c length Characteristic length extracted from the G SIF file of the vessel Section 4 15 4 e Wetted surface Wetted area extracted from the G SIF file of the vessel e Water plane area Water plane cross sectional area extracted from the G SIF file of the vessel e Submerged volume Displacement volume extracted from the G SIF file of the vessel 4 15 5 Vessel Mass Vessels nkara A ES ae L supply_boa 13 supply 2 sup Delete Rename Vessel Data Vessel Data oo a ji Artificial Stiffness h oia Hydrostatic Restoring Fields Linear Current Folder Properties Quadratic Current Save HTML Report Wind Force Calculate Retardation Function Linear Damping Quadratic Damping Pairleads RAO Functions Viscous Force Specified Force Quadratic Transfer Functions DeepC SESAM 4 90 01 DEC 2010 Program version 4 5 The vessel mass dialog looks like Support Vessel Center of gravity and buoyancy in local body coordinates Center of gravity Point 0 m 0 m 4 46962165 m Center of buoyancy Point 2 5919 3525e 009 m 0 m 13 584 Mass coefficients Total body mass 23939600 Kg Kg Mass inertia coefficients boc 2 091084186e 010 K Kg m 2 bor 11 164153145e 010 Kg Kg m 2 be 12 3283062598e 010 Kg Ka m 2 hy 2 070582861e 010 K Kgm 2 yz 1 4551915238 010 K Kg m 2 lzz 3 02397481e 010 Kg Kom 2 Cancel Appl Vessel mass is initially take
92. cements Position and rotation of vessel at a given time step 1s found by first putting the vessel in the position defined in the new vessel dialog Section 4 15 1 then rotating about the X Y and Z axis respectively with the given rotations and at last translating the vessel a delta X delta Y and delta Z distance in the global coordinates system according to the X Y and Z values on the time series file The rotations are performed in a coordinate system parallel with the global coordinate sys tem but with its origin at the vessel initial position e Angle unit Specify whether the rotations are given in degrees or radians Angle Unit e Columns Specify the column numbers for time and X Y Z RX RY and RZ motion respectively Should be specified as 7 comma separated integer values for example 1 3 4 5 7 8 9 e Time Series Specify where the time series for X Y Z RX RY and RZ motion can be found in a time series motion file Should be six comma separated values for example 1 02 1 03 1 04 1 05 1 06 1 07 1 02 will for instance mean time series 1 version 2 etc e X Y Z offset Specify static offset in X Y Z direction The vessel position is found by adding the static position to the vessel original position and the dynamic displacements calculated from the RAO func tions SESAM Program version 4 5 4 19 2 Response Storage decay Y release DeepC 01 DEC 2010 4 135 Set Current Response Storage Static anal
93. cous Force Specified Force Vessel RAO Quadratic Transfer Functions 4 Distributed Viscous Force Elements Y EA A O METE Cancel Apply Viscous force elements are freely defined in 3D space rigidly attached to the vessel operating in undis turbed viscous flow i e the influence of the vessel on the flow is not included in the viscous forces Each element are defined by e Spec Vol Specific volume cross sectional area e Distributed Mass Specific mass mass per length e Force Integration Force integration up to mean water level or instantaneous sea surface Force Integration can Mean b Instantaneous Note that when defining wave parameters on an analysis Section 4 19 4 one defines how to treat the wave potential in the wave zone e Load Types Select drag force only or both drag and inertia force Load Types rag forces only Drag forces only k All load types DeepC SESAM 4 112 01 DEC 2010 Program version 4 5 e Wave Kinematics Specify how and if wave particle kinematics shall be calculated The strip 1 and NSTRIP only options means that the wave particle kinematics will be calculated for the first and the last strips subelements on an element and linearly interpolated in between Wave Kinematics Velocity only drag forces Velocity only drag forces Velocity and acceleration Velocity only strip 1 and NSTRIP only Velocity and acceleration strip 1 and NSTRIP only
94. ction 4 19 12 View static line and vessel results Section 4 24 3 Read dynamic results on relevant analysis Section 4 19 9 Read vessel results on relevant analysis Section 4 19 10 View dynamic results Section 4 24 3 View vessel results Section 4 24 3 View 3D fatigue contour plots Section 4 21 4 View fatigue line plots Section 4 24 3 View fatigue listing file Section 4 21 3 View 3D combined loading contour plots Section 4 22 5 View combined loading line plots Section 4 24 14 48 Static Equilibrium The nonlinear analysis of the system 1s performed in two steps l Static equilibrium analysis This analysis starts with the stressfree configuration of the lines During a number of static load steps it shall end up with the line ends in specified static position of support points Dynamic analysis This analysis starts with the static equilibrium positions and performs a time domain simulation of the system exposed to all 1ts different loads DeepC SESAM 4 10 01 DEC 2010 Program version 4 5 It is not always trivial to make the static equilibrium analysis converge A non convergent system may for instance be related to negative metacentric height lack of stiffness for some degree of freedom etc When there are no obvious errors in the system one may try some of the following steps Experiment with the load group sequences Section 4 19 3 Add artificial stiffness on the vessels Section 4 15 6 Make the line ends rotation free i e s
95. culated at static line positions e Wave zone kinematics The following options are available for wave zone kinematics onstant Potential Mean Water Level Stretch Potential Move Potential Constant Potential Mean water level Wave forces are calculated up to mean water level DeepC SESAM 4 154 01 DEC 2010 Program version 4 5 Stretch potential Wave forces are calculated up to free surface by stretching compressing the wave potential Move potential Wave forces are calculated up to free surface by moving the wave potential Constant potential Wave forces are calculated up to free surface by keeping the potential constant from mean water level and up The fifth tab in the dynamic analysis options dialog looks like L4 Dynamic Analysis Options Ana 19 19x5 Noninear Iteration Procedure Imegular Wave Procedure Animation setup 4 W Produce animation Y Animation file name rao Start time IE s End time 90 s bl Frame rate Animation extent Y X min 200 m Im X max Grid spacing in X direction Y min 00m Im Y max Grid spacing in Y direction Apply Cancel This tab is used to specify that a 3D animation of the system displacements and forces shall be produced When the dynamic analysis has been completed the animation 1s stored in the analysis directory and can be viewed in Sesam Xtract e Produce animation Specify whether an animation shall be generated or not
96. d by pressing LMB on objects in the 3D window The polygon is ended by pressing left mouse button on top of the start point a By selecting entry on this pulldown button you specify whether all objects completely enclosed by a oe polygon rubberband or all objects intersected by a polygon rubberband shall be selected This but ton is relevant when you either do a polygon or rubberband selection DeepC SESAM 2 8 01 DEC 2010 Program version 4 5 If this button is pressed you will be able to select guiding geometry like guide points and guide planes When defining geometry like lines and support points this button must be selected if you want to click on guide points in the 3D window KA When this button is pressed you will be able to select lines risers mooring lines etc in the 3D win dow Selecting segments instead of whole lines requires that this button is pressed Pipe in pipe objects can be selected when this button is pressed Buoys ball joints and flex joints can be selected when this button is pressed Support points can be selected when this button is pressed Vessel geometry can be selected when this button is pressed pib A AIA amp 2 7 1 Apply Property to Selection When you right click a property like sections materials Morison coefficients etc you get access to the Apply to selection action Description Rename Edit Color Code Property Remove Section from selection Labels
97. d by the relevant underlined shortcut letters Pressing Alt f n in sequence will for instance activate the new workspace dialog Note that the relevant tooltip hint for the selected menu item appears in the status bar 2 Toolbar area By pressing the left mouse button on a toolbar entry the user has direct access to different actions When moving the mouse cursor over a toolbar entry the relevant tooltip will pop up in the sta tus bar Note that many of the toolbar entries are of pulldown type This means that each button contains many entries Change to a different entry by pressing the arrow to the right of the toolbar Note that you have to press a button after it has been selected in the pull down list 3 Browser area Where users can access the objects loaded and generated 4 3D window area Where objects are visualized Right click objects in the 3D window to access relevant actions on the objects DeepC SESAM 2 4 01 DEC 2010 Program version 4 5 5 Tabs area Contains three different tabs for program messages such as warnings errors and information messages command line arguments scripting commands and visual clipboard extraction of coordi nates distances etc 6 Status bar area Where tooltips appear and the application posts relevant messages of the ongoing proc esses 2 4 Data Organization Data generated by and read into DeepC are stored in a tree like hierarchy The object structure can be viewed and accessed in
98. d including the largest heading that is to be used in SESAM DeepC Program version 4 5 01 DEC 2010 4 3 DeepC including spreading Specifying the last heading larger than what is required by DeepC is of course no problem Frequencies used in HydroD should smoothly cover the frequency ranges that have significant wave energy in the wave spectrums defined in DeepC In addition retardation functions are calculated in based on added mass at infinite frequency In order to estimate this added mass the frequency set in HydroD should include some high frequency components DeepC can employ second order sum and difference frequency quadratic transfer functions Second order results require a second order free surface mesh as described in the HydroD manual 4 3 1 Mass Modelling for HydroD If the vessel motion in DeepC depend on the vessel response calculated in Wadam HydroD the mass and mass distribution in HydroD as well as the static mooring line tensions should be as accurate as possible This is relevant if the vessel motion to be calculated in DeepC is based on RAOs produced by Wadam sim plified vessel motion or if the vessel motion shall be calculated as a full coupled vessels lines motion anal ysis which also include second order mean drift sum frequency or difference frequency forces If not then it is only the draft of the vessels that is of importance when running HydroD As long as the draft is correct added mass potential da
99. d time 10000 s z Include details of every single hotspot in listing file Select segments Ye Add Selected Clear a rsen Riser inchGotom SSS a risers RisersinchBotom 5 fises Reenen ooo 6 risers RisersinchSirake o T caca e DeepC performs fatigue analysis by rainflow counting The algorithm assumes that the cross section is axi symmetric or must at least be approximated as axi symmetric Each fatigue analysis are defined by the following parameters e Regular irregular Select whether to create a fatigue analysis based on regular or irregular scatter discre tizations e Scatter discretization Select one or more scatter discretizations corresponding to the type selected reg ular irregular The scatter discretization contains information about all probabilities and analysis involved e Probability Give each scatter discretization you have added a probability The analysis will weight the discretizations according to this probability SESAM DeepC Program version 4 5 01 DEC 2010 4 169 e Number of hotspots Number of hotspots points will be placed at equal angular distance along a cross section to be analysed 4 hotspots e Limit time interval Specify that the time interval to be considered shall not be the entire analysis dura tion e Start End time Specify the time interval from which the fatigue damage shall be calculated e Number of periods If regular has been chosen as type you may s
100. d vessel wind force coefficients DeepC SESAM 01 DEC 2010 Program version 4 5 Artificial vessel stiffness Additional viscous force elements Specified point forces Calculation of retardation functions 3 1 2 Mooring and Risers Slender structure modelling includes Segmented lines to represent mooring risers tension legs etc any number of segments Stress joints lines with piecewise linearly varying tubular cross section Ball joints Buoys Flex joints ball joint and hinges with specified rotational stiffness Pipe in pipe contact effects where each of the pipes is defined as a single line Definition of structure properties sections material hydrodynamic coefficients internal fluid mesh densities etc Definition of support conditions boundary conditions for riser mooring lines on the vessel seabed etc 3 1 3 Environment Environment modelling includes Current and wind profiles Wave and wind spectra Seafloor properties stiffness friction Spreading functions Locations site specific data such as water depth gravity water density seabed etc Regular time conditions including current Irregular time conditions including wind data wind generated wave data swell and current Scatter diagrams Scatter discretizations SESAM DeepC Program version 4 5 01 DEC 2010 3 3 3 1 4 Analysis Control and Execution Each regular or irregular time condition 1 e environment specification corresponds to one time
101. de how many analyses to run at the same time Starting more analyses than the number of cores on your computer will not increase performance The Maximum and Maximum 1 options are handy for using the same script on different computers The functionality of the scripting command GetNumberOfPossibleParallelProcesses is hardware dependent but the minimum number of running analyses is always one It is only possible to run the activities of independent analyses in parallel as the dynamic analysis depends on the static which again depends on the input analysis hav ing been run In the parallel execution scripting command it is possible to give both the parent analysis and the different subanalyses as arguments Note that a separate license is needed for each analysis of the same type running at the same time You can set the environment variable MARINTEK LICENSE WAIT to a non empty value to have Simo and Riflex wait for a license rather than exiting if no license is free at the moment This is useful when sharing a network license My Computer gt Properties gt Advanced gt Environment Variables or you can set it for the current session DeepC SESAM 4 160 01 DEC 2010 Program version 4 5 only by running DeepC from a batch script It is not possible to run fatigue or combined loading analy ses in parallel e Analysis Name of analysis e Input Module Static Dynamic Select the checkboxes in these columns to execute Riflex Inpmod Static Dynamic
102. di nate system defined by X vector and Z vector X vector Defines the X axis in the vessel skew coordinate system in local vessel coordinates DeepC SESAM 4 108 01 DEC 2010 Program version 4 5 e Z vector Specified in local vessel coordinates The crossproduct of the Z vector and the X vector defines the Y axis in the vessel skew coordinate system The Z axis in the vessel skew coordinate sys tem is defined by the cross product of the X axis and the Y axis e X Y Z translation Specify whether the line end is fixed or free in the X Y Z direction e X Y Z rotation Specify whether the line end shall be fixed or rotate freely about the X Y Z axis e Stress free to static rotation If one or more rotational degree of freedom is not free the user has to spec ify how much the fairlead point will rotate from stress free configuration to static equilibrium configura tion In order to calculate this rotation the stress free and static equilibrium configuration of the line that shall be connected to the fairlead point must be considered e Specify rotation Select this option if you manually want to specify the fairlead point rotation e Calculate from angle with global XY plane Let DeepC calculate the rotation based on the stress free configuration of the line that is later attached to the fairlead point and the desired angle of the line with the XY plane in static equilibrium condition e Direction Counter clockwise angle in the g
103. diameter will be employed e Inner contact diameter Inner contact diameter for pipe in pipe contact If not specified the cross section inner diameter will be employed 4 13 9 Section Axi Symmetric Non Linear J Structure Properties Load Interfaces Ly Materials J Mesh Densities Eq Sectipoe 3 Slend New Section Axi Symmetric 1 33 Utilities New Section Axi Symmetric Non Linear k 13 Vessels New Section Pipe Mew Section End Cone New Section Cone Labels b Fields Folder Properties Save HTML Report SESAM DeepC Program version 4 5 01 DEC 2010 4 61 The section axi symmetric non linear dialog looks like t x Section Axi symmetric Section Axi symmetric Non Linear Mesh Density on Segment Pipe Linear Isotropic Materi_4 New Edit edsting SectAxdiSym2 i Allow edit Homogeneous pipe Y General y Youngs modulus KPa Geometry Adal Stiffness iding Stifness Torsion Stifness Mase pr length 0 317 tonne m tonnen External cross area 0 2027 m 2 m2 Internal cross area 0 164 m2 m 2 Radius of gyration 0 171 m m O Outer contact diameter Ge m Inner contact diameter Ge m UE Close Apply Axi symmetric non linear cross sections must be used when either axial bending or torsion stiffness is not constant On the top of the dialog one may select either a homogeneous pipe cross section or a general cross section Sectio
104. ding analysis shall not be the entire available analysis duration Time interval The time window is given by a start and end time In case the end time exceeds the time series duration the end of the time series will be used as the end time Number of periods For regular analyses this option may be selected The time window used will be taken from the end part of the time series The length of the time window will be the number of peri ods specified times the regular wave period In case number of periods times the regular wave period exceeds the time series duration the complete time series will be used e Statistical processing only irregular analyses Duration Duration of short term condition Percentile Percentile in Gumbel extreme value distribution e Zero dynamic response criteria only irregular analyses Values less than the specified tolerance for ten sion moment and limit state function are regarded as zero e Line Select line e Segment Select segment on specified line for which fatigue will be calculated 4 22 2 Multiple Combined Loading Analysis ES Analysis Capacity e Combined Loading Analy C Fatigue Analysis New Combined Loading Analysis 03 Environment E Results Run Combined Loading Analysis Structure Structure Properties All Activities Dialog Utilities Faste 4 Vessels lag SETI Fields save HTML Report DeepC SESAM 4 178 0
105. e Strength ration Strength ratio Fu Fy where Fu is the characteristic tensile strength and Fy is the yield strength including possible temperature derating effects and material strength factor if relevant e Fabrication strength reduction factor Material strength factor 4 13 21 Pipe Combined Loading H Structure Properties Combined Loading Fatigue of 9 Load Interfaces Sy Materials Mesh Densities 39 Sections New Fluid Combined Loading Fields save HTML Report be E3 Slender Components eo Utilities 9 Vessels The pipe combined loading dialog looks like A ins Combined Lotina Morinal Diameter 2 0 2445 m m Nominal Thickness 2 00172 m m Ovality Qe 00 External corrosion we 0 001 m Internal corrosion Wear gt 0 002 m Pipe combined loading properties are attached to line and stress joint segments SESAM DeepC Program version 4 5 01 DEC 2010 4 83 e Nominal diameter Nominal external pipe diameter If the keyword Reuse is selected the diameter used when calculating riser forces is reused in the combined loading analysis Note that for a stress joint the diameter for a particular segment is taken from the average value e Nominal thickness Nominal wall thickness If the keyword Reuse is selected the thickness used when calculating riser forces is reused in the combined loading analysis Note that for a stress joint the thick ness for a particular segment i
106. e ate oh a E aa ance 3 1 PEE VESSE A E taunt E E N O 3 1 sE A N E NNA 3 2 E 0470 0 U8 7 Me re RR E O ONA 3 2 Sle Analysis Control ang EXE Cutten sos seg eich cae vocdak ots date oan seen ener idee a 3 3 A OUTS en oat cate aa E E AE TE cect tat EA 3 3 Combined IA o E iiO 3 4 PoStProces S Iie A A iaa 3 5 ILA Sau AATIANVS1S RESU e A 3 5 AA DAA E ce ea eoniteracaelereneastemuanaaaeee 3 7 es Fane R S n aa a a a a eae eR AER 3 11 324 Combined Todd RESUS is 3 12 USER S GUIDE TO DEEPO enaa EE 4 1 Modelini CONCEPT es 4 1 AMES AAA A eee ty oe 4 2 Potential Theory Calculations in HydroD Wadam occcccccncnnnnnnnnnnnnnnnnnononononnononononnnnnnnnnnnnnnnnnnnanininos 4 2 AO Mass Modelling for Hydro Desses obs 4 3 AS Monson Model ty dro ica 4 3 Modelling Overview DEP oda 4 4 Dummy Buoyancy Compensation FOTCE uu ti tii 4 5 Dammy LSV ESCUDO MU A A EEEE A AE 4 6 pica Deep Wark e e dd sian 4 6 TN E A RO 4 6 4T io AAA E A 4 6 As Vessels Modena 4 7 Ao Bounda Condi ons A a 4 7 A Hood da alii o ica 4 7 E lt PRAVA SIS NEN ENE EAEN I EEA A E E E date Cones E AA E T A E 4 8 4 8 4 9 4 10 4 11 4 12 4 13 A A ae ee et eee a ere ee oe er ee 4 9 Ae COS O asks oases sas esse e 4 9 AsO TN TEM RESUS 5 4 san pnacasasnasaiotiesasnsiedscnnluntopnasaquateds a entadesasnndecaoaten saa misasgsen case 4 9 SACE gU DUO zae yt e icnacie E E EER ENE EE EOE EEE 4 9 Files used DDEC o dd a o aaeads 4 10 Environment Data O AO as 4 10 Environment Da
107. e stored and presented in database units only Denved units will not be updated until you press apply UntName Unit _ Display Format Display Precision Acceleration mis general deg Angle general res general AE I general amping is Sas Nts CoupledStiffness Cu en re radin genera A AS Reset to database units OF Cancel Apply Here you specify the desired unit the display format fixed scientific or general and the display precision 2 16 Scripting All user input automatically generate the corresponding scripting commands When a workspace is saved the scripting file is saved together with the workspace as lt workspace name gt js Users may choose to give their input solely as scripting When new versions of DeepC are installed existing projects must be reloaded using the relevant script file The scripting window gives the user a list of available commands on given objects press Esc to remove it axlRiserbinch SESAM DeepC Program version 4 5 01 DEC 2010 2 25 Instead of typing the function name you can select a function from the list and press enter The scripting window also shows the argument list of the selected function eaxiRiser6inch Rgyr 2 of 3Royr Length Since functions may be overloaded several versions of the same function exist but with different argument lists you can press LMB on the green arrows to reach the different overloads and
108. e time axis SESAM DeepC Program version 4 5 01 DEC 2010 4 115 4 15 19 Quadratic Transfer Functions Qu Vessels supply _boat_InfiniteAddedMass Infinite semi supply_boat_LinCur Linear _LinDamp Linearl _Mass BodyM _PotDamping Potent Vessel Data i Vessel Mass Artificial Stiffness Hydrostatic Restoring Linear Current Delete Rename Read Vessel Data Read Vessel Geometry Fields Folder Properties Save HTML Report Quadratic Current Wind Force Calculate Retardation Function Lin ar Damping Quadratic Damping Fairleads RAO Functions Viscous Force Specified Force Quadratic Transfer Functions The quadratic transfer functions dialog looks like t Support Vessel Fairleads Viscous Force Specified Force Vessel RAO Quadratic Transfer Functions gt 2 Use sum GTFs F Use difference OTF cancel Amo Only if vessel data has been read in Section 4 15 4 that contains second order sum and or difference fre quency results or 2nd order wave drift coefficients will the check boxes on this tab be enabled DeepC SESAM 4 116 01 DEC 2010 Program version 4 5 e Use sum Include second order sum frequency quadratic transfer functions in the calculations of the vessel motion e Use diff QTFs Include second order difference frequency quadratic transfer functions in the ca
109. ead Vessel Data h Read Vessel Geometry Fields Folder Properties save HTML Report The read vessel data dialog looks like Interface file Body ID Length Urut Force Unit cos In this dialog the results from the HydroD Wadam analysis are read in and assigned to the vessel The fol lowing parameters must be specified SESAM DeepC Program version 4 5 01 DEC 2010 4 87 e Interface file Specify the path to the hydrodynamic results interface file These files are typically named G SIF and are located in the directory from which Wadam was executed If Wadam has been run through HydroD this path is given as lt Workspace directory gt lt Wadam run name gt 1G 1 SIF e Body ID If you have performed a multibody analysis in Wadam the interface file will contain data for several bodies This field 1s used to specify the body number as given to Wadam With single body anal ysis from Wadam the body ID should be specified equal to 1 e Length Unit Text specifying the length unit of the results on the interface file e Force Unit Text specifying the force unit on the interface file 4 15 3 Read Vessel Geometry H Vessels BS se Delete Rename Vessel Data Read Vessel Data Read Vessel Geometry h Fields Folder Properties Save HTML Report The read vessel geometry dialog looks like Read Vessel Geometny Interface file
110. eak period Y 138s Te e 10 457793278 5 Properties Wave Spectrum New Spreading Function New Current Profile Folder Properties Save HTML Report 01 DEC 2010 Current Profile Current Profile E CurProf2 E CurProf3 i Jonsi Jonswap Spectrum i Jons2 Jonswap Spectrum i Jons3 Jonswap Spectrum Jonswap Spectrum New Jonswap 3 Parameter New Jonswap 5 Parameter New Pierson Moskovitz New Bretschneider New User Spectrum I Allow edit DeepC 02 3 07 Date 27 Oct 2004 21 31 52 Jonswap Spectrum Li al LO CF ar Li tJ J Li al O Lo 5 10 15 20 Wave Period T DeepC 4 17 Cancel Apply DeepC SESAM 4 18 01 DEC 2010 Program version 4 5 Wave spectrums are used to describe the wave energy density in wind generated or swell waves Jonswap spectrums are defined by the following formulae exp in ma al z aa ZO Mp 2 5 f of Hoa Ms Sy 60 09 0 exp Bla ly a 1 2905 H T B 1 25 for North Sea conditions a Ga 0 07 for co lt a F Gp 0 09 for 6 lt a E i Il 15 Ti 44 1 4071 0 287In7 114 In the case of a 3 parameter Jonswap spectrum the user specifies the following parameters e Peakedness y Peakedness parameter giving the ratio of the maximum spectral energy to that of the cor responding Pierson Moscowitz spectrum Press the button to estimate y from the formu
111. ean JS Exit It looks as follows ey Save Report File name a htm a View E A JE Report 04 Analysis E Fatigue AE Directions Al API Wind Spectrums Mli Bretschneider Wave Spectrums AF Current Profiles Al Davenport wind Spectrums Alt Jonswap Wave Spectrums Pale NPD Wind Spectrums A rate acaben properties a HTML on cy eT g C Selected items Report type Here you select the type of data that you want to report on whether to report all data or just the ones cur rently selected and the report type XML or HTML By pressing View after a report has been saved the report will pop up in the relevant associated program The report contains detailed listings of the entire content of all data reported on and is an essential tool in addition to the 3D graphics when documenting the model SESAM DeepC Program version 4 5 01 DEC 2010 2 13 2 11 Copy Paste Copy paste can be done on most of the objects in DeepC When generating similar but not perfectly equal objects copying an existing object and using this as a start point for the new object is often a very attractive option The copy paste action is performed in the following manner e Select the objects that you want to copy in the browser e Right click the selection and choose copy Mame Description Environment Nonlinear Analysis CBF 17125 Nonlinear Anal CB Yeo 195 set Current Response Storage Static analysis Options
112. ed from the File gt New Workspace menu or from the toolbar button D DeepC 2 2 The dialog looks like 01 DEC 2010 Ney Workspace Workspace name Location CD Aw Workspaces Deeplywe abel El Set Database Units Length mi Force M Temperature deic Command Input File CADNV Workspaces Deeplws abel El Cancel SESAM Program version 4 5 Here you specify the workspace name and location In addition you specify the database units 1 e the units in which your data are stored One should note that this is the only time that the database units can be spec ified In other words database units may not be changed at a later stage A command inpufile to be read once the workspace is created may optionally be specified SESAM DeepC Program version 4 5 01 DEC 2010 2 3 2 3 Application Window The application window contains six different areas CA pekWorkspacestadalaaa ddb Deept w Insert Tools Help Menu ite if ge a Default display SE FP AF Fl 460038 K WP Of 22 74 Hp Bee Description Analysis 3 Analysis Environment sg Environment Results 3 Results structure lt Browser Sucture Structure Properties J Structure Properties Utilities 3 Utilities Vessels LJ Vessels Command Line Visual Clipboard abe lt Status bar 1 Menu area Where users can access the menu actions with the mouse button or through pressing the Alt key followe
113. ed mass The column is only present for information purposes It shows the net submerged mass 1 e mass including internal fluid and external wrapping marine growth minus buoyancy also including external wrapping marine growth under the assumption that the entire length of the segment is submerged This assumption is required since the actual position of the line segment in space as well as the wave elevation is unknown at the time of defining the line The first column in the table is present for information purposes It is automatically updated and shows the sum length and the sum net mass of all segments 4 17 2 Pipe in Pipe H Vessels The pipe in pipe dialog looks like Pipe Pipe New Line New Stress Joint Stress Free Coordinates Show Stress Free Configuration Hide Stress Free Configuration Mew Buoy New Ball Joint New Flex Joint New Support Fields save HTML Report gt New Edit existing pip M Allow edit Fipe Outer y Lineu Inner We LinelnnerLumpe Contact property Pipp Start segment End segment 5eg_5J_Inner_ Seg_Rotary Master Seq SlickJointL Seg_SlckdomntLi e Master Fill from selection ve soo OK Choe Pipe in pipe is used to model contact between inner and outer pipes A pipe in pipe pair consists of a master pipe and a slave pipe The master pipe will automatically be equipped with tubular contact components at all
114. ed on the first segment of a stress joint line The following parameters must be given e Start external diameter External diameter at first end of segment e Start thickness Wall thickness at first end of segment e End external diameter External diameter at second end of segment e End thickness Wall thickness at second end of segment DeepC 4 72 01 DEC 2010 4 13 13 Internal Fluid 1 53 Structure Properties Load Interfaces Materials 7 Mesh Densities New Internal Fluid New Component Buoy New Rotation Hinge New SN curve New Section Stress Parameters Fields Folder Properties Save HTML Report The internal fluid dialog looks like 9 Sirenis Properties New Stress Concentration Factor SESAM Program version 4 5 Mesh Density on Segment Pipe Linear Isotropic Material Cd Buoy Cd Segment Intemal Fluid E gt Density Pressure at free surface not in use Free surface elevation not in use 880 Kgm 3 Kgm 3 D Pa Pa Om im Internal fluid properties are attached to lines to specify that the cross section shall be filled with the given fluid They use the following parameters e Density Density of fluid SESAM DeepC Program version 4 5 01 DEC 2010 4 73 e Pressure at free surface This value is not currently used by DeepC e Free surface elevation This value is not currently used by DeepC 4 13 14 Component Buoy 1 53 Structure Prop
115. elect a wind profile e Wind Dir Select a direction property for the main direction of the wind e Seed Wind Specify the random seed used when creating wind force time series e Use Current Specify whether to include current e Current Profile Select a current profile e Current Direction Select a current direction DeepC SESAM 4 40 01 DEC 2010 Program version 4 5 Note that swell is not included in this table If one wants to add swell one should first apply this dialog then right click the irregular time conditions in the browser and select edit This will give access to all the settings of the irregular time condition including swell Section 4 11 23 sae Description _ 9 Analysis WI cB17x5_11x5 Irregular Tir Environment cams 33 3 Air pp TCB7x5 11 Rename aq Directions tal ce7x5 19 Delete 2 25 EDDY location El Block A AS E Set Curren H scatterDiscretization1 E Sail Information E Water ij Fatigue EY Ey Results Paste 4 11 21 Multiple Regular Waves Ey Environment H E Sir Y Directions E ii EDD location Block_A BB Reg5calterl HE Soil Rename Ey Water Delete H E Results A E3 Structure Multiple regular waves h H E Structure Prof Multiple regular time conditions E3 Utilities 13 Vessels Information Copy Paste SESAM DeepC Program version 4 5 01 DEC 2010 4 41 The multiple regular wav
116. elect celz F Tse e e Start Tp 153 258 35s 455 553 653 5s 85s 9 2 0 5m 13 1337 0656 11850 6342 1863 S 3 1 5 m 293 9660 49760 77380 55697 2 215868 62300 74495 5 49 6955 32265 56750 un ba sil h3 T 5 5m i 510 4884 160298 8 6 5 m 2 126 1670 mah i 9 7 5m 30 521 2701 5 10 6 5m T 154 979 Z Aa Inr m an nan Ai Once the blocks have been defined one may press the Auto fill names Hs Tp button Define blacks Y Insert new block y Remove active block 9 Auto fill tools F Auto fill Tp T This will cause block names Hs and Tp values to be filled out according to the block definitions Tp values are put equal to the centre Tp value of the block Block Name Color Active Ha Tp 1 B1x5_4 AO al Sm dg E Byxo 6 AO fa 3 5 m os 3 B3x5_9 A 0 3 5 m 93 4 B3x5_ 12 Tr 3 5 mM 123 E loo c ac r D Eon AE m 010 mim al All entries in the grid can of course also be manually specified if you don t like the pregenerated names and or Hs Tp values SESAM DeepC Program version 4 5 01 DEC 2010 4 35 The last columns in the top grid are used to specify so called bins Tp Bin Name Probability Bin Name Probability 1 4s Head20 07 Headr0 0 3 2 5s AllHeads 1 3 ga Head30 0 2 Headed 0 3 For many systems it is relevant to run more than one heading or more than one draft etc for a given scatter block This requires defining more than one
117. er to Co ordinate system SLOBAL GLOBAL GLOBAL The direction of the force moment components are defined by the global coordinate sys tem The force moment point of attack is at the node This means that the force components essen tially refer to a local coordinate system parallel to the global with its origin at the node Note that if DeepC 4 146 01 DEC 2010 SESAM Program version 4 5 the force is applied to an end node on a line that is also a support point and this support point applies a skew coordinate system the force components will refer to this skew coordinate system Similarly if the node is a fairlead the force components refer to the vessel or vessel skew coordinate system depending on the settings of the fairlead LOCAL Force components refer to the local coordinate system of the element at the given fraction along the segment e Remove Specify that the force shall no longer be applied 4 19 4 Dynamic Analysis Options In order to perform a time domain nonlinear analysis dynamic analysis options must be specified E L anim decay Y release Name Description Rename Environment bE a MT r Edit Set Current Response Storage Static analysis Options Export Execute Analysis View Static Configurations Read All Results Read Static Results Read Dynamic Results Read Vessel Results Response Post Processing
118. erically The following parameters are needed to define a flex joint e Line Select a line on to which the flex joint will be connected e Segment Select a segment on to which the flex joint will be connected e First end Last end Specify that the flex joint shall be attached to the first or last end of the segment First and last end on a segment is specified according to first and last end of the line e Component Select a buoy component property to attach to the flex joint Section 4 13 14 DeepC SESAM 4 128 01 DEC 2010 Program version 4 5 e Hydrodynamic load Select hydrodynamic load coefficients for the flex joint Section 4 13 1 e Rotation hinge Select a rotation hinge for the flex joint Section 4 13 15 4 17 9 Buoy K Fields Folder Properties Save HTML Report Line ir Segment te First end C Last end Component Component Hydrodynamic load HydrodpniamicLoad Apply E Buoys are used to model point objects with volume mass and hydrodynamic load Buoys are attached to segment ends They require the following input e Line Select a line on to which the buoy will be connected e Segment Select a segment on to which the buoy will be connected e First end Last end Specify that the buoy shall be attached to the first or last end of the segment First and last end on a segment is specified according to first and last end of the line e Component Select a buoy component propert
119. erties 9 Load Interfaces E Materials ES Mesh Densities 3 Sections 3 Slender Cr E Utilities New Internal Fluid Vessels New Rotation Hinge he Mew Stress Concentration Factor Mew SN curve New Section Stress Parameters Fields Folder Properties Save HTML Report The component buoy dialog looks like l Structure Properties E Ed Buoy Cd Seament Internal Fluid External Wrapping Marine Growth Component Buoy 4 d New O Edit existing Component M Allow edit Mass Volume DeepC SESAM 4 74 01 DEC 2010 Program version 4 5 Component buoys are attached to buoys and ball joints to describe their mass and displacement proper ties They use the following parameters e Mass Mass of buoy e Volume Displacement volume of buoy 4 13 15 Rotation Hinge ae Structure Properties New Internal Fluid New Component Buoy Mew Rotation Hinge New Stress Concentration Factor New 5N curve New Section Stress Parameters al 3 Utilities H Vessels Fields Folder Properties Save HTML Report The rotation hinge dialog looks like Miera Vronsptis intemal Fluid Extemal Wrapping Marine Growth Component Buoy End Cone Section Cone Section No Elements Rotation Hinge 4 gt De New Edit existing RotationHinge 1 M Allow edit vw X Y andZ aes C Xand bending axes Rotation X ge ff a kN
120. es dialog looks like MEY efine multiple regulan waves 2 2 BSxS 15 3 4 JE carcel Ann This dialog is a utility tool for rapidly defining a number of regular waves belonging to each bin in a scatter discretization It is the scatter discretization Section 4 11 18 from which the dialog is activated that defines the rows in the table Each row has the following columns e Block Scatter discretization block e Bin Bin within the scatter discretization block e H Wave height of scatter discretization block e T Period of scatter discretization block e Reuse Two scatter discretization bins may reuse the same regular wave This is particularly relevant when two or more bins have been defined in the same scatter discretization block These will then typi cally use the same regular wave e Block The scatter discretization block from which the regular wave shall be taken e Bin The scatter discretization bin from which the regular wave shall be taken e Name Specify name of regular wave H Wave height T Period DeepC SESAM 4 42 01 DEC 2010 Program version 4 5 4 11 22 Multiple Regular Time Conditions I 3 Environment Fe y Air ba Y Directions E Pax EDD location E Block_A I ES Reg5 catter ReoularDiscretization Rename PL Water FP H E Results E Structure Multiple regular waves H E Structure Pre Multiple regular time conditions a 539 Utilities Sie H E Vessels
121. esponse storage dialog looks like Rie Storage On the nodal storage tab one specifies the nodes from which nodal X Y and Z displacement time series shall be generated e Line Name Name of line from which nodal results shall be extracted e Segment Name Name of segment from which nodal results shall be extracted e From To Position Extract results for nodes from From Position to To Position along the segment The positions are specified as fractions values from 0 to 1 along the segment e From To Node Read only information field Displays the node interval corresponding to the specified from to position e No Storage Select No Storage if no displacement time series shall be stored for the segment DeepC SESAM 4 138 01 DEC 2010 Program version 4 5 The third tab in the response storage dialog looks like File Storage This tab is used to specify the elements for which time series of forces and moments shall be stored The fields in the table have the following interpretation e Line Name Name of line from which forces and moments shall be extracted e Segment Name Name of segment from which forces and moments shall be extracted e From To Position Extract results for elements from From Position to To Position along the segment The positions are specified as fractions values from 0 to 1 along the segment e From To Element Read only information fields Displays the element interval corresponding to the s
122. etimes be of interest to directly edit the input files for Riflex and Simo In these instances it is a good idea to employ the generate input files dialog On the other hand if there is no need to edit the input files these may be directly generated by the execute analysis dialog Section 4 19 7 The following fields are used by the generate input files dialog e Scatter discretization Specify that you want to generate the input files of all analysis connected to a scatter discretization Section 4 11 18 e Use all analysis Select this option if you want to generate input files for all the analysis in the project e Single analysis Generate input files for a single selected analysis only e Analysis Name of analysis e Riflex Simo Static Dynamic Press the buttons in these column to manually edit the input file for Riflex Inpmod Simo Riflex Stamod Riflex Dynmod e Lock Riflex Simo Static Dynamic Select this checkbox to ensure that DeepC will never make any auto matic updates to the Riflex Inpmod Simo Riflex Stamod Riflex Dynmod input file e Datacheck Select this checkbox to perform a datacheck only for the static or dynamic analysis J Press this button to apply the lock setting of the analysis in the table 4 19 7 Execute Multiple Analysis Execute Analysis 3 Anal Envi 3 Fati Multiple Analysis LJ Res Generate Multiple Input Files New Analysis utili Paste Fields Folder Properties Save HTML Report
123. extracted from this Alternatively users may specify them in the above tables e Frequency Regular wave angular frequency e Heading Wave propagation direction Heading 0 deg corresponds to a wave propagating in positive X direction Heading is increasing counter clockwise meaning that a heading of 90 deg corresponds to a wave propagating in positive Y direction e Amplitude and phase If this radiobutton is clicked the first column for a given heading in the main table is used to define the amplitude of the complex motion The second column is used to define the phase angle e Real and imaginary If this radiobutton is clicked the two columns for a given heading in the main table is used to define the real and imaginary parts of the complex motion respectively 4 15 17 Viscous Force Morison Elements 1 29 Vessels semi fed supo Delete Rename Vessel Data Vessel Data Vessel Mass Read Vessel Data a ii le Artificial Stiffness lead Vessel Geometry Hydrostatic Restoring Fields Linear Current Folder Properties Quadratic Current Save HTML Report Wind Force Calculate Retardation Function Linear Damping Quadratic Damping Pairleads RAO Functions Specified Force A Quadratic Transfer Functions SESAM DeepC Program version 4 5 01 DEC 2010 4 111 The viscous force dialog looks like 1 2 Suppont Vessel Quadratic Damping Faideads Vis
124. fied for headings ranging from 0 to and including 360 deg coefficients at 360 deg must equal those at 0 deg e Heading Current direction to which current coefficients apply Angle counterclockwise from vessel local X axis e Current C1 C6 Give the quadratic current coefficients corresponding to force in the 6 degrees of free dom 4 15 10 Wind Force H Vessels Semi 3 supply S di Delete Rename AAA Vessel Mass de i eae as Artificial Stiffness ee ee Hydrostatic Restoring Fields Linear Current Folder Properties Quadratic Current save HTML Report Calculate Retardation a El Linear Damping Quadratic Damping Fairleads RAO Functions Viscous Force Specified Force Quadratic Transfer Functions DeepC SESAM 4 98 01 DEC 2010 Program version 4 5 The wind force dialog looks like Supponh Vessel Artificial Stiffness Hydrostatic Restoring Linear Current Quadratic Curent Wind Force Calculate Retz 4 gt Wind force area 2000 m 2 m2 Symmetry Single XZ Reference height 10m m Wind Force Coefficients Y E ee EN Wind cS Wind ce G A foses A A EN 210 deg 0 4741546 kN s 027548262 kN a 0 kN s 2Im 2 0 kN s Zim 0 kN s 2 m 34 87277394 Kh S 20 deg 1044952310 0 84281811 hs O KNES ZI 2 DSZ DP 2m 74 01559347 1 40 deg 04002503 kv 090422418 Ws O RNs Zin 2 0 KN 0 1017715048 10 5 40 deg 0 3140504 kNts 23971678 kN ee 0 kKN s 2 m 115
125. fness proportional Torsion Local stiffness proportional damping factor for torsion e Stiffness proportional Bending Local stiffness proportional damping factor for bending The third tab in the dynamic analysis options dialog looks like t Dynamic Analysis Ophons ihe 119 Time Integration and Damping Mondinear iteration Procedure Irregular Wave Pi d Update frequency Moo Number of iterations Po Required accuracy e006 Step Subdivisions A Continuation Code Conti M Log iteration information OF Cancel This tab is used to specify the iteration procedure SESAM DeepC Program version 4 5 01 DEC 2010 4 151 e Update frequency Perform static equilibrium iteration every Update frequency timestep Equilibrium correction will be performed for timesteps without iteration e Number of iterations Specify maximum number of iterations performed in the attempt to reach equilib rium e Required accuracy The solution is considered to have converged when the modified euclidean displace ment norm is smaller than Required accuracy e Step Subdivisions If desired accuracy is not reached within Number of iterations the time step will be divided by 2 a maximum Step Subdivisions number of times e Continuation Code Time stepping will continue even though desired accuracy is not reached e Log iteration information Specify whether iteration information shall be printed to listing file For irregular analyses the fou
126. gram version 4 5 lead to be renamed and or moved Note that when a row is copied the Existing name in the original row will appear in the new row For the row with the first occurrence of an Existing name the fairlead will be renamed or moved if it has been changed For the remaining rows a new fairlead will be created 01 DEC 2010 e Fairlead ID String used to identify the fairlead e X Y Z Position Coordinates of the fairlead specified in vessel local coordinate system By first posi tioning the cursor in one of the X Y Z Position cell and subsequently selecting a point in the 3D win dow the selected point will automatically appear in the table e Note that it s not allowed to have a fairlead and a support Section 4 17 10 in the same position For cou pled motion vessels it s not allowed to have fairleads or supports in the vessel origin 4 15 15 Uncoupled Vessel Fairleads ws riser Environment 3 Results Structure Structure Properties Utilities Vessels sem Hame Description om semi_Fairleads g semi Geo zem AAU New Uncoupled Fairlead DeepC SESAM 4 106 01 DEC 2010 Program version 4 5 The uncoupled fairleads dialog looks like Support Vessel Given in local body coordinate system Y ESE ee ee fees on f ne an HIN S E Cancel All the fields in the table have the same interpretation as for coupled fairleads Section 4 15 14 There is howe
127. he main direction of wind generated sea e Wave spectrum Select a wave spectrum for the wind generated sea e Spreading Select spreading function e Random seed wave Specify random seed used when creating pre generated wave time series DeepC SESAM 4 46 01 DEC 2010 Program version 4 5 Swell is specified on the third tab Air Wind Sea Swell Current i Include Swell Direction Dinwavet aud Wave spectrum Jonswap_ 725 19 5 EA W Spreading Spreading id hd e Include Swell Specify whether swell shall be included e Direction Select a direction property for the main direction of swell sea e Wave spectrum Select a wave spectrum for the swell e Spreading Select spreading function On the fourth tab current parameters are given Air Wind Sea Swell Curent W Include current Direction Dircurz Current profile CurProf2 ele e Use Current Specify whether to include current e Direction Select a current direction e Current profile Select a current profile SESAM Program version 4 5 4 11 24 Regular Time Condition H E Results Ey Structure H E Structure Prope 29 Utilities H E Vessels 01 DEC 2010 pam Reglond 1410 01735 Regul ET RegCond_14x10_D90 Regul fe RegCond_14x10_D45 Regul Rename sian e Water Edit location Wi aber Set Active location Seabe Borde New Irregular Time Condition Air New Regular Time Condition regu
128. he selection in all rows is inverted e Project on XY plane When the Calculate button is pressed stress free coordinates will be calculated such that the line is horizontal if this toggle is pressed e Calculate Press this button to calculate stress free coordinates for all line ends that have been selected Calc End 1 2 is toggled This button calculates coordinates for each line independent of all other lines e Calculate Connected This button only operates on lines where both Calc End 1 and Calc End 2 is selected When the button is pressed lines stress joints are sorted based on what lines stress joints they are connected to Stress free coordinates is then calculated for the lines stress joints that are connected such that they are positioned along a straight line in stress free configuration Calculate connected is typ ically relevant with lines ending up in a stress joint DeepC SESAM 4 124 01 DEC 2010 Program version 4 5 View stress free configuration When this toggle is selected the stress free positions of the displayed lines are shown together with the lines Some points should be considered when specifying stress free coordinates The distance between the stress free end coordinates should equal the sum of the segment stress free lengths on a line stress joint The static equilibrium solution can depend on how the stress free coordinates are specified One way of specifying stress free coordinates for a riser wo
129. he starting point for the n th 1 copy SESAM DeepC Program version 4 5 01 DEC 2010 2 15 2 13 Color Code Property When right clicking a property you get access to the Color Code Property action several properties may be selected Descripton Delete Edit Remove SN curve from selection Apply SN curve to selection This results in objects using the selected properties being visualized with different colors DnYB1 DnwCl Dn Y B2 DnWYD Ambiguous Color Code Property is among other things a useful tool for visualizing what kind of properties that are in use DeepC SESAM 2 16 01 DEC 2010 Program version 4 5 2 14 View Options From the view menu you can reach the view options dialog Insert Tools Help Browser Tabs status Bar 8 Refresh Graphics Toolbars Options h E Show stress free configuration A View Static Configurations It looks as follows View Options Environment Fatigue FEM Loads Structure Utility Default display SESAM Program version 4 5 General settings are specified in the first tab View Options Selection 01 DEC 2010 DeepC 2 17 Touched by rubberband Background Color O Bounding Box Color A ComboBox Font A Font O Hardware Acceleration O Interaction Wireframe Line Width eg Monitor a Perspective Point Size O Show Rotation Center O Show Trackball e Symbol Size A Text Color Preview E default
130. hickness and the segment cross section Note that when calculating hydrodynamic forces on the segment the marine growth is not taken into account DeepC SESAM 4 56 01 DEC 2010 Program version 4 5 4 13 5 Linear Isotropic Material E Structure Properties Fields Folder Properties save HTML Report H a Vessels The linear isotropic material dialog looks like La Seto Pron srt Section Axi symmetric Non Linear Mesh Density on Segment Pipe Linear Isotropic Material ca 4 d f New Editesisting Materiall Yield 200 MPa Pa Density 7850 Kg m 3 Young Poisson Thermal Expansion Material Damping s m Linear isotropic materials are defined by the following parameters e Yield Yield strength e Density Material density e Young Elastic modulus e Poisson Poisson s ratio e Thermal Expansion Thermal expansion coefficient e Material Damping Material damping coefficient SESAM Program version 4 5 01 DEC 2010 4 13 6 Mesh Density New Mesh Number of Elements on Stress Joint pala ae Fields Folder Properties Save HTML Report Vessels The mesh density dialog looks like Mey Structure Properties f New Editexisting MeshDensity5 M Allow edit Element length im m Element Length Do Endl Segment End Mesh densities are defined by the following parameters DeepC 4 57 e Element length Desired element length Numbe
131. icients apply Angle counterclockwise from vessel local X axis e Wind C1 C6 Give the wind force coefficients corresponding to force in the 6 degrees of freedom SESAM DeepC Program version 4 5 01 DEC 2010 4 99 4 15 11 Retardation Functions goo Vessels semi 1 supph Delete Rename Vessel Data Vessel Mass Artificial Stiffness Hydrostatic Restoring Fields Linear Current Folder Properties Quadratic Current Save HTML Report Wind Force Calculate Retardation Function Linear Damping Read Vessel Data Read Vessel Geometry Quadratic Damping Fairleads RAO Functions Viscous Force Specified Force Quadratic Transfer Functions DeepC SESAM 4 100 01 DEC 2010 Program version 4 5 The calculate retardation functions dialog looks like t Support Vessel Linear Current Quadratic Curent Wind Force Calculate Retardation Function Linear Damping Quadratic Damping 4 Time step 25s El alculate Select function Retardation element 3 3 z Ba Hoy Retardation function DeepC 02 2 09 Date 24 Nov 2004 15 08 50 p i os Retardation Function a E mr m E bs E T k l E D 10 45 O e orem ni oe ows ON s a ons ON s ons 276096 0 N s m 0 Ns gt e e a e a 12674924 Nstm Cancel Retardation functions are the equivalent of a time domain input of the vessel added mass and potentia
132. inear interpolation is used at intermediate z levels When above top z value the current velocity and direction equals the one specified at the top z value Similarly when below bottom z value it is the value at the bottom z value that is applied 4 11 16 Location New Location Paste Fields Folder Properties Save HTML Report DeepC SESAM 4 28 01 DEC 2010 Program version 4 5 The location dialog looks like ha Create Edit Location gt Mame Location Gravity 3 80665 m s2 m s 2 Sur water Soll Density i 226 kg m Kam 3 Kinematic viscosity i 4976 005 H s m z Nsm 2 Environment locations define the site specific data connected to a location on the globe The first tab shown above Air takes the following parameters e Density Density of air e Kinematic viscosity Kinematic viscosity of air SESAM DeepC Program version 4 5 01 DEC 2010 4 29 After defining the air properties the next tab is called Water La Create Edit Location gt Mame Location Gravity 3 80665 m s2 m s 2 Air Water Soil Density i 025 Kg m 3 Kam 3 Kinematic viscosity i 9612 006 H s m z Nsm 2 waterline Z Om mm The Water tab takes the following parameters e Density Density of water e Kinematic viscosity Kinematic viscosity of water Waterline Z Z level of the waterline In DeepC this must be specified equal to 0 DeepC SESAM 4 30 01 DEC 2010 Program version 4 5
133. ing Analysis 22 CL_template Set Current View Result Component d Sample extreme Show Listing File Statistical extreme Copy Paste 4 23 Results Data Organization Time series distributions range curves spectra line plots etc are stored under the results folder Results El Oo Combined Loading Results of Utilization Factor Bl Dynamic Results 3 Distributions of 9 Filtered Time Series of 9 Line Time Series of 9 Range Curves 3 Spectra of 9 Vessel Time Series EI i Fatique Results 09 Fatigue Life H E Static Results E Line Results of 9 Vessel Position It contains 4 subfolders 1 Combined Loading Results Results from the combined loading calculations 2 Dynamic Results Results from the dynamic analysis Divided into 6 subfolders 1 Distributions Contains cumulative distributions generated from line time series 2 Filtered Time Series Contains the low and high frequency time series of line and vessel time series that have been filtered on frequency DeepC 4 184 01 DEC 2010 SESAM Program version 4 5 3 Line Time Series Contains time series of displacement forces curvature decomposed line end forces etc For information on how to store line time series results see Section 4 19 2 4 Range Curves Contains curves showing statistical characteristics min max mean std skewness etc of selected result types along the lines
134. is e Identifier Free text e Description Free text e Formulation Choose either lumped or consistent load and mass formulation SESAM DeepC Program version 4 5 01 DEC 2010 4 143 e Static load steps Choose when print shall be generated in the static loading sequence e Displacement norm The displacement norm is a measure of achieved convergence in the static iteration Specify whether these shall be printed or not The second tab in the static analysis options dialog looks like a Static Analysis Options Static Analysis Load Sequence Static Point Loads Load Group Sequence J steps teraion Toterance Type wez O vea _ a e psp Coo nie a a Saa oo 3 gt ES _ E gt During a static analysis the static loads will usually be applied in several groups For each group one or more types of loads can be applied varying from zero to their final value in a specified number of steps The final static configuration can depend on the load sequence Each load group is defined by e Steps Number of steps in which the static load types shall be applied e Iteration Maximum number of iterations performed per step trying to reach static convergence e Tolerance Acceptable accuracy as measured by displacement norm DeepC SESAM 4 144 01 DEC 2010 Program version 4 5 e Type 1 2 3 4 Select a load type VOLU Volume forces weight and buoyancy DISP Specified displacements
135. ization bins may reuse the same wave spectrum This is particularly relevant when two or more bins have been defined in the same scatter discretization block These will then typi cally use the same wave spectrum e Block The scatter discretization block from which the wave spectrum shall be taken e Bin The scatter discretization bin from which the wave spectrum shall be taken e Name Specify name of wave spectrum e Type Select wave spectrum type e Hs Significant wave height e Tp Peak period e Gamma Peakedness parameter giving the ratio of the maximum spectral energy to that of the corre sponding Pierson Moscowitz spectrum Only relevant for Jonswap type On top of the dialog there are three buttons gt All Bret Schneider All Jonswap All T orset H auger Wave spectrums y Alrur le Rin He Tr Dama Alrur le Rin As When All Bret Schneider is pressed the table will automatically be filled with Bret Schneider two parameter Pierson Moskovitz spectra for all bins Similarly when All Jonswap or All Torset Haugen is pressed the table is filled with Jonswap 3 or parameter Torsethaugen spectra DeepC SESAM 4 38 01 DEC 2010 Program version 4 5 4 11 20 Multiple Irregular Time Conditions tee CB17x5_19x5 A CB7x5_11x5 tee CB7x5_19x5 2 25 EDDY location E Block_A H e Rename Sol Delete 9 Fatigue Multiple wave spectrums E 33 Structure H E Structure Proper Edit ee fa
136. l damping This means that vessel data must be read in Section 4 15 2 prior to calculating them Two bi products result from the calculate retardation functions process namely added mass at infinite frequency and extra damping required to prevent negative damping displayed in the dialog These bi products are used in the time domain simulation of the vessel motion The dialog only takes one input parameter e Time step Time step used in numerical solution of retardation functions Recommended values ranging from 0 2 to 0 5s When the time step has been specified the Calculate button must be pressed to do the actual calculation of the retardation functions A retardation function can then be displayed in the graph control by first selecting the correct component in the upper right combo box SESAM DeepC Program version 4 5 01 DEC 2010 4 101 4 15 12 Linear Damping Ey Vessels semi Delete Rename Vessel Data Vessel Mass Artificial Stiffness Hydrostatic Restoring Linear Current Quadratic Current Wind Force Calculate Retardation Function Linear Damping Quadratic Damping h Fairleads RAO Functions Viscous Force Vessel Data Read Vessel Data Read Vessel Geometry Fields Folder Properties save HTML Report Specified Force Quadratic Transfer Functions The linear damping dialog looks like
137. l a delta X delta Y and delta Z distance in the global coordinates system according to the X Y and Z values on the time SESAM DeepC Program version 4 5 01 DEC 2010 4 157 series file The rotations are performed in a coordinate system parallel with the global coordinate sys tem but with its origin at the vessel initial position e Angle unit Specify whether the rotations are given in degrees or radians Angle Unit Degrees Radianz e Columns Specify the column numbers for time and X Y Z RX RY and RZ motion respectively Should be specified as 7 comma separated integer values for example 1 3 4 5 7 8 9 e Time Series Specify where the time series for X Y Z RX RY and RZ motion can be found in the time series motion file Should be six comma separated values for example 1 02 1 03 1 04 1 05 1 06 1 07 1 02 will for instance mean time series 1 version 2 etc e X Y Z offset Specify static offset in X Y Z direction 4 19 6 Generate Multiple Input Files Export New Analysis Multiple Analysis Generate Multiple Input Files Execute Multiple Analysis H a Utiliti Paste H E vess Fields Folder Properties Save HTML Report The generate multiple input files dialog looks like d Generate mur Piles a Use all analysis Single analysis y Input files table 4 Generate 99 Apply Lock Settings 92 DeepC SESAM 4 158 01 DEC 2010 Program version 4 5 It may som
138. l analysis to be generated 1 e response storage static and dynamic analysis parameters will initially be taken from this analysis but may later be edited Block Name of scatter discretization block to which analysis will be connected Bin Name of scatter discretization bin to which analysis will be connected Name Name of analysis object Press the heading in this column to automatically generate all names Condition The environment time condition containing the environment data for this analysis Response Settings This button is only available after the apply button has been pressed Pressing this button will activate the Response Storage dialog Section 4 19 2 of the analysis in the given row DeepC SESAM 4 156 01 DEC 2010 Program version 4 5 e Static Parameters This button is only available after the apply button has been pressed Pressing this button will activate the Static analysis Options dialog Section 4 19 3 of the analysis in the given row e Dynamic Parameters This button is only available after the apply button has been pressed Pressing this button will activate the Dynamic analysis Options dialog Section 4 19 4 of the analysis in the given row e Vessel Name of vessel The motion parameters for all vessels in the workspace must be specified for every analysis e Motion Type Specify how the vessel motion shall be calculated Motion Type R40 Tunctions Fixed Time series on file Time series from
139. la 1 0 T 2 5 1 y exp 5 75 1 15T fs i 9 0 Tp lt 3 6 JH e Significant wave height H Equals 4 sqrt mg where mg is the variance of the wave displacement time series Approximately equal to the average of the highest one third of the waves e Peak period Tp Period with maximum energy density Oa Op and f are given values 0 07 0 09 and 1 25 SESAM DeepC Program version 4 5 01 DEC 2010 4 19 4 11 8 Jonswap 5 Parameter E E CurProf2 Current Profile 8 E CurProf3 Current Profile i Jonsi Jonswap Spectrum i Jons2 Jonswap Spectrum Jonswap Spectrum Jonswap Spectrum New Jonswap 3 Parameter New Spreading Function New Jonswap 5 Parameter New Current Profile New Pierson Moskovitz New Bretschneider New User Spectrum Fields Folder Properties save HTML Report Li Greate Edit Wave Spectrum Jonswap 3 Jonswap gt Pierson Moskowitz DeepC D2 3 07 Date 28 Oct 2004 14 38 05 Jonswap Spectrum 10 15 20 25 30 35 40 Wave Period T Cancel Apply Jonswap 5 parameter wave spectrums are defined by the formulae defined under Jonswap 3 parameter spec trums The only difference is that the user now also must specify values for DeepC SESAM 4 20 01 DEC 2010 Program version 4 5 e Ga Left width parameter Left refers to the left side of the peak period if the spectrum is plotted with angular frequency along the x axis e oy Right width parameter 4 11 9
140. lcula tions of the vessel motion e Use 2nd order wave drift coeff Include second order mean wave drift coefficients in the calculations of the vessel motion If both difference QTFs and 2nd order wave drift coefficients are used contributions from the diagonal will be included twice when exporting to the Simo input file Both sum and difference frequency transfer functions may not be included i e one excludes the other 4 16 Structure Data Organization Structure data are organized in the following main folders 3 Structure CJ Ball Joints Buoys Flex Joints _ Lines 23 Pipe in Pipes Supports e Structure Folder containing all structural data Structural data typically have a spatial position and a visual representation in the 3D window e Ball Joints Contains ball joint segment connectors Section 4 17 7 e Buoys Contains small volume segment attached bodies Section 4 17 9 e Flex Joints Contains flex joint segment connectors Section 4 17 8 e Lines Contains lines Section 4 17 1 e Pipe in Pipes Contains pipe in pipe contact objects Section 4 17 2 e Supports Contains support points Section 4 17 10 SESAM DeepC Program version 4 5 01 DEC 2010 4 117 4 17 Structure Data Types 4 17 1 Line 0 3 Struc pee i B B New Stress Joint E s5 Stress Free Coordinates a Strug Show Stress Free Configuration El E uti Hide Stress Free Configuration vesse New Buoy New Ball Joint
141. lete Vessel Data Vessel Mass Artificial Stiffness Hydrostatic Restoring Linear Current Read Vessel Data Read Vessel Geometry Fields Folder Properties save HTML Report Quadratic Current Wind Force Calculate Retardation Function Linear Damping Quadratic Damping Fairleads RAO Functions Viscous Force Spedfied Force Quadratic Transfer Functor The specified force dialog looks like Support Vessel x Als Specified force elements are used to apply forces on the vessel They are defined by the following parame ters DeepC SESAM 4 114 01 DEC 2010 Program version 4 5 e Method Select coordinate system to which direction and point of attack is referenced e Shape Specify whether the force is constant in time linearly varying from 0 and up to Magnitude or harmonic shave Ha rmonic e X Y Z Coo X Y Z Coordinate of the force point of attack e Direction X Y Z X Y Z Component of a vector that specifies the force direction e Magnitude Magnitude of constant force Amplitude of harmonic force Maximum value value at End Time of ramp force e Start Time Point in time at which force starts to act e End Time Point in time at which force shall stop acting e Period Period of harmonic force e Phase Phase of harmonic force Force follows a cosine curve that is shifted by the phase along th
142. lines typically also pulls the vessel down in addition to the gravity force on the vessel In order to correct this erroneous buoyancy force the user must add a force acting in the vessel centre of buoyancy The force magnitude should equal the difference between the vessel buoyancy and mass and its direction should be the global z axis There are two different options on how to specify this compensation force One choice is to apply the specified force option for the vessel Section 4 15 18 Specified Force Elements Y A second option is to add the force as a static point load for a particular analysis Section 4 19 3 This option is known to be the most robust one in order to get the static solution to converge however this method requires the user to define a dummy line and place a node at the origin of force DeepC SESAM 4 6 01 DEC 2010 Program version 4 5 4 6 Dummy Line in Vessel Origin Version 2 2 and earlier of DeepC required that the user had to specify a dummy line with one of its end points in the vessel origin The background for this dummy line was that Riflex requires a line in the vessel origin in coupled vessel lines calculations although this line should not affect the calculation results From version 3 0 this dummy line no longer has to be modelled If it does not exist DeepC will automatically cre ate one and export to Riflex when required 4 7 Typical DeepC Workflow The following section lists the task
143. ll Distribul Ef Results t Line3_chain_upper_Element_i_Te Weibull Distribui 2 3 Dynamic Results line chain_upper e TH ae E i F gt gt Delete E Distributions Line5_chain_upper 19 Filtered Time Series A Line6_chain_upper A 88 Line Time Series fi Line7_chain_upper Display Probability Distribution 2 Range Curves F Spectra Eh QJ Vessel Time Series H Fatigue Results H Static Results Distributions are generated from time series Use Weibull Graph to display the cumulative distribution function on a Weibull paper DeepC SESAM 4 186 01 DEC 2010 Program version 4 5 4 24 3 Display Graph Results et HF _Line4_chain_upper_Flement_1_Te F A Dynamic Results M HF Lines chain aai ST Distributions It HF _Lineg_chain_ Delete Filtered Time Series a HF Line7 chain y Rename E Line Time Series ht LF_Line 1_chain_u E Range Curves rt LF Line2_chaim_u Parame tric Graph et LF_Line3_chain_uppe a et LF_Line4_chain_upper_ Flement_ E Te F im et LF Line5_chain_upper_Element_1_Te F ss Results fmt LF Line _chain_upper_Element_1_Te F Display graph is a general command that will show the graph of the selected object DeepC D2 3 10 Mota N7 Nan MNA 14 44 99 HF L ine5 chain _ upper Element 1 Te Force N HF_Line5_chain_upper_Element_1_Te Mean 3619 2 Std 42127 2 Min 91 Filtered_For Filtered Fo et HF_Line4_chain_upper_Flement_i_Te mi HF Line S chain upper
144. lobal XY plane A rotation axis for the fairlead point from stress free to static equilibrium condition is defined by the global Y axis moved by direction in the XY plane rotation direction e Rotation The fairlead point will be rotated around an axis defined by the global Y axis rotated by direc tion in the XY plane The magnitude of the rotation around this axis is defined by Rotation e Angle with global XY plane Specify the angle between the global XY plane and the line end in static equilibrium condition If the fairlead point lies at the upper end of a line the angle is defined positive below the XY plane Conversely at the lower end of a line the angle is defined positive above the XY plane SESAM Program version 4 5 DeepC 01 DEC 2010 4 109 4 15 16 RAO Functions 5 3 Vessels t Support Vessel s semi The RAO functions dialog looks like Vessel Data Faiteads Vessel RAO Frequencies Y Freeney JES ess TE 4 __ 0 209439516 2 0 212989345 3 0 216661572 4 0 220462650 5 0 224399477 6E 0228479474 0 232710570 e 0 237101346 9 0241660982 40 0 246399432 ao 0251327425 42 0 256456553 43 0 261799395 344 0 267369598 a5 0 273181974 46 0279252678 0 285599350 C 0 292241 z Headings Y a foa 2 30 deg 2 es deg 4 Jen dea 5 J90 deg 8 120 deg 7 135 deg 8 150 deg z E Delete Rename Fields Folder Properties S
145. ltiple wave spectrums Multiple irregular time conditions E Results Structure Bay structure Properties Edit Fly Utilities H Vessels Information Copy Paste Fields Folder Properties Save HTML Report The multiple wave spectrums dialog looks like Li Veins multiple waye spectrums All Bret Schnelder All Jonswap All Torset Haugen Wave spectrums y eee A A e a a fees em fem ss vonswap 6s Jonswap 6m es 2 jes tipi lem ism _ vonswap 6 11 Jonswap Sm 11s 17961745 a Jes16 mt lem tes _ vonswap 6 16 Jonswap Sm jes 1 a Bonjan em tts __ vonswap_2 11 Jonswap om 11s 462360603 OF Cancel Apply This dialog is a utility tool for rapidly defining a number of wave spectrums belonging to each bin in a scat ter discretization If the user wants to employ Jonswap 5 parameter or user defined spectra the spectra must be defined through the respective wave spectrum dialogs Section 4 11 8 Section 4 11 12 It is the scatter discretization Section 4 11 18 from which the dialog is activated that defines the rows in the table Each row has the following columns SESAM DeepC Program version 4 5 01 DEC 2010 4 37 e Block Scatter discretization block e Bin Bin within the scatter discretization block e Hs Significant wave height of scatter discretization block e Tp Peak period of scatter discretization block e Reuse Two scatter discret
146. lts All the load steps of the static analysis can be viewed as contour plots on the deformed structure in the 3D DeepC SESAM 3 6 01 DEC 2010 Program version 4 5 window 30 Oct 2004 13 47 qa Effective Tension Te N Min 1 77313e 006 Max 1 7 8381e 006 1 f 44e 006 1 43e 006 1 42e 006 1 41e 006 1 7 80e 006 1 7 79e 006 1 7 8e 006 1 7 8e 006 1 f7 e 006 1 7 6e 006 1 77 5e 006 1 7 4e 006 1 7 73e 006 30 Oct 2004 13 40 qggq Effective Tension Te M Min 366863 Max 743903 f 439e 005 7 1258 D05 6 911e 005 6 496e 005 6 142e 005 gt 468e 005 IIED 2406 003 9256 005 611e 005 2976 003 983e 005 669e 005 30 Oct 2004 13 41 qa Effective Tension Te M Min 31827 8 Max 458303 24364005 086e 005 749e 005 492e 005 195e 005 2 498e 005 2 601e 005 2 204e 005 2 007e 005 1 7 09e 005 1 412e 005 1 115e 005 3 1338 004 SESAM Program version 4 5 01 DEC 2010 In addition one can view 2D graphs of the following results e Axial force e Axial elongation e Bending moment My e Bending moment Mz e Shear force Sy e Shear force Sz e Torsional moment e Torsional deformation e Curvature Cy e Curvature Cz e X displacement e Y displacement e Z displacement DeepC D2 3 07 Date 30 Oct 2004 13 52 21 Analfx5 11x5 riser SO000 100000 Moment Myy N m 0 0 200 400 600 s00 nairx5_11x5_riser Max 126754 Min 40058 7 3 2 2 Dynami
147. ly on selected lines Section 4 19 4 e Atevery node Specify that wave kinematics shall be calculated for every node along the line e Endl 2 Defines the line end connection points One end point is typically a support point on the sea floor and the other end point 1s typically a fairlead on a vessel The end points may also be the end point of other lines or stress joints By first positioning the cursor in either the end 1 or the end 2 edit control and subsequently selecting a point in the 3D window the selected point will automatically appear in the edit control If a support or a vessel fairlead exists at the selected point then its name will be filled into the dialog and the line will be explicitly attached to the support fairlead when doing Apply OK This means that the line will get boundary conditions from the attached support fairlead and if the support fairlead is moved later on the line end will follow If no support fairlead exist at the selected end ponits when the line is created the line will be defined in between the coordinates of the selected points In that case the line ends is not explicitly attached to a support fairlead If a support fairlead is created at the line end later on the line will get boundary conditions from that support fairlead however the line end will still be non attaced Note that it is not allowed to have non attached and attached line ends at the same point e Points distance This is a read
148. m 10 kNm C e SESAM DeepC Program version 4 5 01 DEC 2010 4 75 Rotation hinge properties are attached to flex joints Section 4 17 8 or ball joints Section 4 17 7 to specify free fixed or a stiffness in rotation around the different axis Rotation is around local axes of the neighbour element in the line where the flex ball joint is specified The parameters are defined as follows e Rotation around Specify axes to rotate around f X Yand Z axes f Xand bending axes X Y and Z axes Rotation is around local X Y and Z axes X and bending axes Rotation is around local X and bending axes This option is only allowed when the roation hinge property is applied to a flex joint e Rotation X Y Z Bending Specify whether rotation is fixed free or has a rotational stiffness Fixed This option is used to fix a ball joint in the specified degree of freedom Only allowed for ball joints Free The flex ball joint is free to rotate in the specified degree of freedom Constant stiffness Specify a constant rotational stiffness The stiffness is per unit radian Only allowed for flex joints Stiffness curve Define a stiffness curve by specifying moment values as a function of rotaion angle Values must be given in increasing order and for Rotation Bending values must start at 0 Only allowed for flex joints 4 13 16 Pipe in Pipe Contact 1 3 Structure Properties C Combined Loading C Fatigue Load Inte
149. may right click the relevant parent folder to get access to the definition dialog U E wires JE san Jon Sy Structure E Ey Ball Le New Line C Buoy New Stress Joint o 3 Supp Stress Free Coordinates n 7 Ly Structure Show Stress Free Configuration M Utilities Hide Stress Free Configuration H E Vessels a New Buoy New Ball Joint New Support Po gt New Uncoupled Fairlead Labels Fields En Folder Properties bI mesage Save HTML Report m DeepC SESAM 2 6 01 DEC 2010 Program version 4 5 Similar menus can be reached by right clicking the objects in the 3D window Move End Copy wa Delete Rename Edit Segments cc De l Properties Compute Line Shape Labels Named set View options Visible model 2 6 Graphical Interaction RMB and LMB are abbreviations for right and left mouse buttons The following shortcut keys are always available Pan move the visible image in the 3D window by pressing Ctrl RMB Zoom by pressing Shift RMB Zoom rubberband by pressing Ctrl Shift RMB Rotate by pressing AlttRMB In addition on the toolbar menu there are a number of graphical interaction buttons eo See eo Ss When toggled rotate the visible image with the RMB When toggled zoom the visible image in out with the RMB When toggled pan the visible image with the RMB SESAM DeepC Program version 4 5 01 DEC 2010 2 7 When
150. mping and first order excitation forces will be correct even if the mass is not mass data given to HydroD can be overridden in DeepC The static mooring line tensions are usually not known prior to running DeepC However if the final posi tion of the vessels in static configuration are known one may use the following approach to calculate them e Make a model of the lines mooring lines risers etc and vessels in DeepC When modelling the vessel don t worry about specifying correct mass etc at this stage The position of the vessel and the vessel fair leads are the only data that are relevant e Run static analysis in DeepC with simplified vessel motion Simplified vessel motion meaning that the motion of the vessels are calculated from RAO functions or pregenerated time series With simplified vessel motion the vessel position in static analysis is fixed equal to the vessel position plus an offset and the line configuration will adjust to the vessel position e Take the static tension and the angle of the mooring lines risers etc and use as input to HydroD e Run HydroD with the linearised anchor TLP elements e Load the updated data from HydroD Wadam onto the vessels in DeepC 4 3 2 Morison Model in HydroD A Morison model may be given as input to HydroD and one may in addition specify viscous force elements in DeepC Section 4 15 17 When the vessel motion in DeepC shall be calculated from RAO functions no special consider
151. mponent Buoy End Cone Section Cor_4 E New Editexisting SectEndCone1 I Allow edit End extemal diameter 0 6 mi End thickness 20mm m t DeepC SESAM 4 70 01 DEC 2010 Program version 4 5 End cone cross sections define strength properties of stress joint segments Section 4 17 3 End cone Cone End cones only define the properties at one end of a segment since the other end is specified by the previ ous cone section The following parameters must be given e End external diameter External diameter at second end of segment e End thickness Wall thickness at second end of segment 4 13 12 Section Cone H Structure Properties sq Load Interfaces EJ Materials ES Mesh Densities ES Sections E Sler New Section Axi Symmetric Utilities New Section Axi Symmetric Non Linear Vessels New Section Pipe New Section End Cone 3 Fields Folder Properties save HTML Report SESAM DeepC Program version 4 5 01 DEC 2010 4 71 The section cone dialog looks like t Structure Properties Intemal Fluid Extemal Wrapping Marine Growth Component End Cor a 3 E New Edit existing SectCone2 I Allow edit Start extemal diameter 0 3m m Start thickness 2mm m End extemal diameter 0 4 m End thickness 22mm m tT end Dond Cone cross sections define strength properties of stress joint segments Section 4 17 3 End cone Cone Cones are us
152. must be selected on the view toolbar GQ ee Ta ED Static Result The fields in the dialog have the following interpretation e Selected components Select the contour colour result component Effective Tension Te N Effective Tension Te N Relative Axial Elongation Torsional Deformation deg Curvature Kyy rad Curvature kzz rad m Shear Force Syy N Shear Force Szz M DeepC SESAM 4 166 01 DEC 2010 Program version 4 5 e Increment Specify the increment to use when stepping up or down J al Use these buttons to step to the first last static load step EEN Use these buttons to go one increment down up By using the Set Current option the user may switch view of static results between different analyses while the Static Results dialog is active Hame Description Environment Ye Ana s5_1 1 5 Nonlinear Analysis CB Yeo 1785 Delete Rename Response Ah Eosi Static analysis Options 4 19 13 Start Xtract Mame Description Environment PRA a e 214100 ze ii Delete anim ae decay Rename yE release Edit set Current Response Storage Static analysis Options Dynamic analysis Options Export Execute Analysis View Static Configurations Start Xtract Response Post Processing Read All Results Read Static Results Read Dynamic Results Read Vessel Results Information Copy Paste SESAM DeepC Program version 4
153. n Axi symmetic Section Ad ymmetric Non Linear Youngs modulus If a homogeneous pipe cross section is chosen mass per length radius of gyration constant axial stiffness constant bending stiffness and constant torsional stiffness will be calculated based on the pipe geometry and Young s modulus When the general cross section is chosen all these parameters must be specified DeepC SESAM 4 62 01 DEC 2010 Program version 4 5 On the first tab in the dialog one specifies geometry For a homogeneous pipe it looks as follows Geometry Axial Stiffness lending Stiffness Torsion Stiffr Density 8 19121447 tonne m 3 tonne m 3 Outer diameter 0500013142 m m Internal diameter 0456350348 m m O Outer contact diameter Ge m O inner contact diameter Ge m The following parameters must be given e Density Density of pipe material e Outer diameter Cross sectional outer diameter Also used to calculate buoyancy and wave forces e Internal diameter Cross sectional internal diameter Also used to calculate mass of internal fluid if any e Outer contact diameter Outer contact diameter for pipe in pipe contact If not specified the cross sec tion outer diameter will be employed Assuming pipe cross section e Inner contact diameter Inner contact diameter for pipe in pipe contact If not specified the cross section inner diameter will be employed Assuming pipe cross section For a general cross
154. n from the G SIF file read in for the vessel Section 4 15 4 All the data may however be edited e Centre of gravity Centre of the vessel mass e Centre of buoyancy Volume centre of the vessel displaced volume e Total body mass Total mass of vessel not including lines e Ixx Moment of inertia about vessel local X axis Defined as y r ody e Ixy Coupled moment of inertia Defined as e Ixz Coupled moment of inertia Defined similarly to Ixy e Iyy Moment of inertia about local Y axis Defined similarly to Ixx e yz Coupled moment of inertia Defined similarly to Ixy e Izz Moment of inertia about local Z axis Defined similarly to Ixx SESAM Program version 4 5 01 DEC 2010 e Iyy Moment of inertia about local Y axis Defined similarly to Ixz DeepC 4 91 One should note that viscous force elements Section 4 15 17 may also contribute to the vessel mass 4 15 6 Artificial Stiffness El Vessels supply bu Hy semi supply _b E suppl Rename Vessel Data Vessel Mass Artifidal Stifiness Hydrostatic Restoring k Linear Current Read Vessel Data Read Vessel Geometry Fields Folder Properties Save HTML Report Quadratic Current Wind Force Calculate Retardation Function Linear Damping Quadratic Damping Fairleads RAO Functions Viscous Force Specified Force Quadratic Transfer Functions
155. n is reached from the Edit menu E HST Weare i iz ed et a PEGA View Insert Tools Help KO Undo Modify StressProperties 1 Cirl z Ca Redo Modify SNCurvel corl Undo Redo Dialog s Set UndoMark1 Ciria fe Copy with transform Ctrl T la 2 Delete 211 g ee I im E Al Cl lt e C E Edit Selected uid rho 880 0 P 0 ncentration Factor Analysis Vessel clonal Properties mis Units a CableSolver Response Post Processing cture Properties of 9 Load Interfaces dio io The dialog looks like Point Tolerance o o m m Angular Tolerance fo deg deg Cancel Specify that you want to use tolerant modeling and define a suitable point tolerance When the distance between two points is smaller than the point tolerance they are considered equal 2 23 Undo Redo Each time a script command sequence is performed in the application either by typing the commands directly into the scripting window or as a result of other operations like Apply OK in dialogs a new undo SESAM DeepC Program version 4 5 01 DEC 2010 2 33 redo mark is created By selecting Undo or Redo from the Edit menu the user may step back and forth in the undo redo history A Undo Redo dialog may be opened by selecting Undo Redo Dialog fe Copy with transform LA 2 Delete ra ae ba l a 1 The dialog looks like UndolRedo
156. nal Tension Mass proportional Torsion Mass proportional Bending Stiffness proportional Tension Stiffness proportional Torsion Stifness proportional Ben Cancel Time integration and damping parameters include Beta Beta parameter of the Newmark beta family of integration operators Gamma Newmark operator parameter gamma Mass proportional Add damping term equal to the global mass multiplied by the given number The Riflex manual suggests the following formulae for calculating this factor Let the structural damping to critical damping ratio c 2mo at two natural frequencies 64 and ms be 44 and Aa respectively 2104 0057 ae l 4 Mass proportional damping DeepC SESAM 4 150 01 DEC 2010 Program version 4 5 e Stiffness proportional Add damping term equal to the global stiffness multiplied by the given number The Riflex manual suggests the following formulae for calculating this factor Let the structural damping to critical damping ratio c m at two natural frequencies y and wz be 41 and Az respectively q 2 2a a hw y y dy Stifness proportional damping e Mass proportional Tension Local mass proportional damping factor for tension e Mass proportional Torsion Local mass proportional damping factor for torsion e Mass proportional Bending Local mass proportional damping factor for bending e Stiffness proportional Tension Local stiffness proportional damping factor for tension e Stif
157. nctions Viscous Force Specified Force Quadratic Transfer Functions Artificial Stiffness Hydrostatic Restoring Linear Curent Quadratic Current Wind Force Calculate 4 0 kKN s 2 m 2 ee 0 kN s 2 m DS 22 0 PS 2m 0 kN s 2m 32588437 69 KN s 2 482 2im 54599 3369 gt KN S 2 T7615 E eo aeo eo 558048 rs NOES ZI 2 0 ES Zin 00s 2m 65704 2868 74032 9992 E so sen 74032 99822 19 4005 Ps 145260078 KIO KIS ZIY 20 k s 0 2 86165 9831 7469008 tN s 2 1641 88087 0 KWS ZIM 2 052 0 Ns 2m 50897 6870 110 deg 44 110024 kN s ES O KN S220 kNs Zim 0 HS Zim 34702 9684 14 32008 ws EOE e sO Peo 13881 1873 100 deq 8 7040323 1701 5849 0 KW7s 2m 2 052 2 9254 1240 08H Or QU 0225 8 5 119 40806 2 2im 37941 91213 130 268 66814 kN 2 1209 A El SESAM DeepC Program version 4 5 01 DEC 2010 4 97 Quadratic current coefficients are used to calculate current forces on the vessel that are proportional to the current velocity squared The following parameters must be specified e Symmetry Specify whether the current coefficients shall be mirrored for symmetric current directions With double symmetry specified current coefficients must be specified for headings ranging from 0 to and including 90 deg With single symmetry coefficients must be specified for headings ranging from 0 to and including 180 deg With no symmetry coefficients must be speci
158. nd wind spectra Directions Direction properties used to describe wind wave current directions etc Locations Each location is put directly under the environment folder Soil Properties related to the seabed SESAM DeepC Program version 4 5 01 DEC 2010 4 11 e Water Includes wave spectra regular wave components spreading functions current profiles etc e Scatter diagrams Scatter diagrams may be defined for given locations e Scatter discretizations Defined for given scatter diagrams 4 11 Environment Data Types 4 11 1 NPD Wind Spectrum p E windP i Envir windP onment 1 Properties Me ta fag s New Wind Profile New APT New Davenport Paste Fields Folder Properties Save HTML Report f New Edit existing WindSpectrum2 Iv Allow edit Surface friction coefficient 0004 Cancel Apply Wind spectra are used to calculate forces on vessels in coupled vessels lines analysis Wind spectra and wind profiles are used in combination to describe the wind The NPD spectrum applies only for extreme wind speeds typically 1 10 or 100 year return periods It uses the following parameters e Surface friction coefficient Surface drag coefficient used for transverse gust spectrum DeepC SESAM 4 12 01 DEC 2010 Program version 4 5 4 11 2 API Wind Spectrum j Environment New Davenport Fields Folder Properties Save H
159. note that due to some restrictions on units in Riflex and Simo database units should always be specified to length unit m and force unit N or KN in DeepC Default input units the units that are assumed when no explicit unit is specified by the user in the input can be set at any time The relevant dialog is accessed through the Edit menu es ee seis View Insert Tools Help 2 Undo Modify StressProperties1 Ctrl Z la 3 sf g E Ca Redo Modify SNCurve 1 ctrl Y ls Undo Redo Dialog E E D P ir 4 SetUndoMark1 Ctrl U Rg Copy with transform Ctrl T ia 2 Delete Del a Ef Edit Selected E Analysis luid rho 880 0 P 0 Vessel incentration Factor Fatigue ictional Properties a coolly 9 Supports Response Post Proces oo Structure Properties PO SESAM Program version 4 5 01 DEC 2010 A dialog that looks as follows pops up Input Unies Database Units Length G Mass Force pi Angle Temperature dec Time Input Units Ange deg general E Force n general 8 Length m general eooo TemeDitt eld general 8 Time Js general 8 Reset to database units OF Cancel Apply DeepC 2 23 DeepC SESAM 2 24 01 DEC 2010 Program version 4 5 Press the Details button to expand the table to see all units Input mts Database Units Length m Mass Ka Force y Angle ia Temperature deic Time Input Units F efill table i Notice Results will b
160. ns Dynamic analysis Options Export Execute Analysis View Static Configurations Start Xtract Response Post Processing Read All Results Read Dynamic Results Read Vessel Results Information Copy Paste DeepC 4 163 DeepC SESAM 4 164 01 DEC 2010 Program version 4 5 4 19 12 View Static Configurations HE Anal 00 E F anim decay Y release Set Current Response Storage Static analysis Options Dynamic analysis Options Export Execute Analysis View Static Configurations Start Xtract Response Post Processing Read All Results Read Static Results Read Dynamic Results Read Vessel Results Information Paste After a static analysis has been performed and static results read in the View Static Configurations dialog can be activated Static Results Current Analysis anal 25 1985 Result Presentation Selected component Eftective Tension Te N Static configuration Load step number 1 of El uzing increment i Ey ELE a SESAM DeepC Program version 4 5 01 DEC 2010 4 165 This dialog is used to view a 3D contour plot of line vessel deformations and line forces D Dec 2004 09 17 qa Effective Tension Te N A a oe Max 435342 A A 055e 005 5 e8 005 459e 005 160e 005 2 862e 005 2 504e D005 2 2096 005 1 967e 005 1 669e 005 1 37 1e 005 1 072e 005 740e1004 Static Result display type
161. odulus and compression factor Compression factor v Y 03 SESAM DeepC Program version 4 5 01 DEC 2010 4 67 f Homogeneous pipe Y C General Y Youngs modulus 200 GPa Pa Geometry Axial Stiffness Bending Stiffness Torsion Stiffness C Constant torsion stiffness Torsion stiffness curve Torsion Moment 1 0 0 2 0 001 200 kNm 3 0 002 350 kNm 4 a DeepC D2 309 Date 237 TT nn ae gt g Torsion Moment Curve 00000 Torsion Moment FL 0 0 0 0005 0 007 0 0015 0 002 Torsion Angle 1 L C Homogeneous pipe Y General Y Youngs modulus Pa Geometry Axial Stifness Bending Stifness Torsion Stiffness e Constant torsion stifness CO Torsion stifness curve Constant torsion stiffness Y 34 kNm 2 rad N m rad The following parameters may need to be given e Compression factor Poisson s ratio e Constant torsion stiffness Product of shear modulus and section torsion modulus torsion moment divided by torsion angle per length e Angle Torsion angle per length e Torsion Moment Torsion moment at given torsion angle per length DeepC 4 68 4 13 10 Section Pipe SESAM 01 DEC 2010 Program version 4 5 1 53 Structure Properties Load Interfaces E Materials Mah Densities a Eq we New Section Axi Symmetric E a is New Section Axi Symmetric Non Linear og Vessels New Section End Cone New Section Cone Fields Folder Properties
162. omogeneous pipe Y C General Youngs modulus 200 GPa Pa Geometry Axial Stifness Bending Stiffness Torsion Stiffness O Constant axial stiffness Axial stiffness curve 2 Axial Force 23 B Ba DeepC D2 3 09 Date 23 M Axial Stiffness Curve 4000 Axial Force F 000 0 i 0 01 0 02 0 03 Relative Elongation L L C Homogeneous pipe Y General Y Youngs modulus Pa Geometry Axial Stifness Bending Stiffness Torsion Stifness ls Constant axial stiffness Axial stiffness curve Q Ea E moduluz rea Y ENT N The following parameters may need to be given e EA E modulus Area Constant axial stiffness e Elongation Relative axial deformation axial strain e Axial Force Force corresponding to given elongation SESAM DeepC Program version 4 5 01 DEC 2010 4 65 Bending stiffness is specified on the third tab It looks as follows depending on the selection of homogene ous pipe or not and whether or not the stiffness shall be constant f Homogeneous pipe Y General Y Youngs modulus 200 GPa Pal Geometry Axial Stiffness Bending Stiffness Torsion Stiffness f Constant bending stiffness Bending stiffness curve Y Calculated based on Youngs modulus iM Friction moment we 1000 kNm MN mn f Homogeneous pipe YY General Y Youngs modulus 200 GPa Pa Geometry Axial Stiffness Bending Stifness Torsion Stiffness CO Constant bending stiffness
163. on 4 11 23 Single Irregular Time Condition 1 3 Environment DEDDY locz E Air E EDDY loc 1 Directions 22 EDDY locz i EDDY loca ae H Block UE El so Delete En Soil Edit location fi E Water Set Active location Lo Fatigue Results 13 Structure New Scatter Diagram k Structure Prop Ey Utilities Information Vessels Copy Paste Fields Folder Properties save HTML Report DeepC SESAM 4 44 01 DEC 2010 Program version 4 5 The irregular time condition dialog looks like ME rreauleir lime Condition Env OO ear Curation ge 10200 s s Actual duration 2 15354 s z Time step 42 0 53 3 Alr Wind Sea Swell Current i Include Wind Sea Direction NORTH Dd Wave spectrum wave spec a Spreading 4 Random seed wave li Cancel Apply On the top of the dialog three parameters are defined Duration Specify duration of pre generated wave time series The fourier components of a pregener ated wave time series is dependent upon the duration This means as an example that the first 100 sec onds of a wave time series will look different if the duration is specified to 3600 seconds as opposed to 8000 seconds Note that the duration should be specified equal to a power of 2 times the time step dura tion time_step 2 n If this is not the case the duration will automatically be rounded up to the nearest power 2 time steps Also note that the duration
164. oncentration factor dialog looks like ice Properties End Cone Section Cone Section No Elements Rotation Hinge Stress Concentration Factor SN Curve Stress Crossectional P_4 amp New Edit existing Ser IY Allow edit Specify stress concentration factor Y 235 By Bay E Stress Evaluation DeepC D4 2 01 Date 21 Nov 2008 19 20 41 To fa Stress Concentration Factor 2 jot p2 ouswa E C E ter wat D E M y LO yem LO on on LO lle Tm 0 0 2 0 4 Fraction along segment Close Stress concentration factors are attached to segments to adjust stress values in fatigue calculations A piece wise constant curve for the stress concentration factor as a function of fraction along segment is defined in the table e Start Fraction The corresponding stress concentration factor will be applied from this fraction of the segment and up to the next start fraction DeepC SESAM 4 78 01 DEC 2010 Program version 4 5 e SCF Stress concentration factor Stress ranges are multiplied by the stress concentration factor e Stress Evaluation Select between Outer Mid and Inner Wall as the radial position for calculation of bending stress Stress Evaluation Mid Wail x Outer Wall Mid Wall F 4 13 18 SN Curve Ei Structure Properties ES Combined Loading New Stress Concentration Factor New Section Stress Fields save HTML Report 9 Vessel
165. only field automatically updated by the program showing the distance between endl and end2 A user may copy the value in this field select with left mouse button and press Ctrl c and paste into one of the segment length fields position the cursor in one of the segment length fields and press Ctrl v specifying the segment length as the distance between end1 and end2 multiplied by some value Length L 1139 526477 m 1970 0756484 0 35 m e Initially stressed segments This option enables the user to use initially stressed segments at the start of the static analysis When selected initially stressed segment lengths is specified in the Initial length column The feaure may e g be used when modelling lines between two vessels fairleads ISTR load type must be activated Section 4 19 3 e Name Name of line segment e Length Stress free length of line segment 1 e the length of the segment if it was placed in gravity free vacuum with no external forces applied to it e Section Segment cross section property Section 4 13 8 e Material Segment material Section 4 13 5 Only necessary to specify if segment uses a pipe cross sec tion e CD Segment Segment hydrodynamic load coefficients Section 4 13 2 e Wrapping Segment external wrapping Section 4 13 3 e Marine Growth Segment marine growth Section 4 13 4 e Mesh Density Segment mesh density Section 4 13 6 SESAM Program version 4 5 DeepC 01 DEC 2010 4 119 e Net submerg
166. or last end of the segment First and last end on a segment is specified according to first and last end of the line e Component Select a buoy component property to attach to the ball joint Section 4 13 14 e Hydrodynamic load Select hydrodynamic load coefficients for the ball joint Section 4 13 1 SESAM DeepC Program version 4 5 01 DEC 2010 4 127 e Rotation hinge Select a rotation hinge for the ball joint Section 4 13 15 4 17 8 Flex Joint Se Structure Ball Joints Fields Save HTML Report H E Structure F H E Utilities uba Vessels The flex joint dialog looks like Ml Veins ple Joie BO New Edit existing Flexointt Line Linel Segment Seg F3 First end C Last end Component buoy TF_E quipment_4ton Cd buoy CD_E Woy Zero Rotation hinge RotationHinge1 Flex joints can be used to model hinges and joints with specified rotational stiffness between two line seg ments or between a line segment and the vessel A flex joint is similar to a ball joint Section 4 17 7 The main difference between a flex joint and a ball joint is the rotational stiffness that is included for the flex joint On the other hand the rotational modes can not be fixed and hydrodynamic coefficients Section 4 13 1 can only be defined relative to local coordinate system of the neighbour elements in the actual line There is also a slightly difference in how a flex joint and a ball joint is handled num
167. parameters e Reference length Reference length of wind turbulence e Surface friction coefficient Surface drag coefficient Also used for transverse gust spectrum DeepC SESAM 4 14 01 DEC 2010 Program version 4 5 4 11 4 Wind Profile Properties Wind Spectrum New Wind Profile Paste Fields Folder Properties 0 Save HTML Report The wind profile dialog looks like Reference height 10m Wind profile exponent 0 11 MA Average wind velocity 37 49 ms m Cancel Apply Wind profiles are used together with wind spectra to describe the wind energy density applied to vessels in coupled vessels lines analysis Wind velocity as a function of height is given by the following formulae U Z ul Ti I Height above sea surface Zr Reference height li Z Average wind velocity at height z above sea surface SESAM DeepC Program version 4 5 01 DEC 2010 4 15 ii Average wind velocity at reference height Wind profile exponent 4 11 5 Direction LA Dircur 4 Dircur Properties New Direction soi La Paste pie Fatigue mH Results Fields H Structuri Folder Properties H Structuri Save HTML Report AA l lihar The direction dialog looks like Cancel Apply Directions are used to specify the main direction of wind waves current profiles etc They are defined by one parameter e Angle Angle counter clockwise from the
168. pecified from to position e No Storage Select NoStorage if no force time series shall be stored for the segment Note that all elements for which fatigue or combined loading analysis shall be performed must have force storage defined All analyses that belong to a scatter discretization and shall be used for fatigue calculations should define the same storage intervals for forces and moments SESAM DeepC Program version 4 5 01 DEC 2010 4 139 The fourth tab in the response storage dialog looks like File Storage Envelopes Nodal Response Force Response Curvature Response Decomposed Force Specify segments from which curvature response shall be stored Note that only segments with non zero bending stiffness can report curvature This tab is used to specify the elements for which time series of curvature shall be stored The input is equal to that for Force Response DeepC SESAM 4 140 01 DEC 2010 Program version 4 5 The fifth tab in the response storage dialog looks like File Storage Envelopes Nodal Response Force Response Curvature Response E a Point 653 069 m 308 779 m 639 134 m Point 0 m 10 m13 m 4 YF This tab 1s used to specify that decomposed line end forces and moments shall be caluclated What 1s calcu lated is the force acting on the line at the end points and the force is decomposed in global X Y and Z direc tion e Line Name Name of line from which forces and moments shall
169. pecify that the rotational degrees of freedom on support points and vessel fairleads shall be free In coupled vessel lines analysis one can add balljoints Section 4 17 7 in the fairlead points to achieve the rotation free ends If static equilibrium can be achieved with the rota tion free ends use the static equilibrium rotation of the line ends to specify the stress free to static rota tion of the support points and fairleads and reintroduce the desired rotational stiffness Try to improve the stress free configuration Section 4 17 4 4 9 Files used by DeepC DeepC utilizes a number of files The user does not need to worry about the location or names of most of these files with a few exceptions Hydrodynamic results interface file from HydroD Wadam analysis These files are given as input in the vessel modelling Section 4 15 4 Vessel geometry model This is a file containing the finite element representation of the vessel geometry Section 4 15 3 Dynamic results animation file These files are produced during an analysis if requested Section 4 19 4 4 10 Environment Data Organization A workspace may contain data for a number of locations around the globe The environment data is organ ized into the following main folders La Ei i y a pT 2 1 9 Environment ES Air a n a Directions EDDY location BB Block_A H ScatterDiscretization 1 fea Water a Fatique Air Data related to the air layer such as wind profiles a
170. pecify the number of periods as the time interval e Include details of every single hotspot in listing file Normally the most detailed information reported in the fatigue listing file 1s the statistics for the segments By toggling this button yearly damage for every single hotspot will be reported e Line Select line e Segment Select segment on specified line for which fatigue will be calculated 4 21 2 Run Fatigue Analysis Analysis 9 Capacity C Combined Loading Analysis New Fatigue Analysis 9 Environment i 3 Results 539 Structure La J Structure Properti All Activities Dialog Utilities Paste E vessels Fields SEM Save HTML Report DeepC SESAM 4 170 01 DEC 2010 Program version 4 5 The run fatigue analysis dialog looks like t Activity Monitor gt Executing Aiserlife 4na 5 1 risers Journal activity executions Duration Status 6 a 1 Fatigque_lnnerpipe Fatigue Analysis 58 Finished 6 AT 2 Fatigue_center_pipe Fatigue Analy Running E AT 3 Fatigue_outer_pipe Fatigue Analysis This dialog is used to execute all the fatigue analysis that are selected in the list Relevant actions for each analysis can be reached by right clicking the analysis in the list Status GP 1 Fatigue_Inner_pipe Fatigue Analysis 0 3 SUCCESS Mo i a SUCCESS 2 Fatigue_center_pipe Fa E 3 Fatigue_outer_pipe Fati DeepCratigue
171. pipe respectively and STIFF is contact spring sitffness per unit length e Dampint coefficient Dash pot damping coefficient per unit length e Axial sliding friction Include effect of axial sliding friction Parameters to be specified are Frictional stiffness Spring stiffness associated with static friction coefficient Sliding velocity limit Velocity limit to change from sliding status dynamic friction to static dis placement status static friction Static friction coefficient Dynamic friction coefficient Dynamic sliding friction coefficient Friction caused by rotation Include effect of friction caused by rotation e Compression stiffness Specify either constant stiffness or a stiffness curve SESAM DeepC Program version 4 5 01 DEC 2010 4 77 Constant stiffness Constant contact comprssion stiffness per unit length Stiffness curve Define compression stiffness curve by specifying 2 or more pairs of pressure force corresponding to spring compression Values must start at 0 and compression must be given in increasing order Note that the input to Riflex is defined with negative signs and is given in inverse order of the values given here 4 13 17 Stress Concentration Factor T Structure Properties oe i Combined Loading New Stress Concentration actor New SN curve New Section Stress Parameters Fields Save HTML Report E 3 Utilities Ey Vessels The stress c
172. pports or fairleads Sec tion 4 15 14 in the vessel origin Coordinate system Global The support point stiffness properties are referred to the global coordinate system Coordinate system Skew The support point stiffness properties are referred to a skew coordinate sys tem defined by X vector and Z vector X vector Defines the X axis in the skew coordinate system Z vector The crossproduct of the Z vector and the X vector defines the Y axis in the skew coordinate system The Z axis in the skew coordinate system is defined by the cross product of the X axis and the Y axis X Y Z translation Specify whether the line end shall move freely be fixed or have a spring stiffness in the X Y Z direction X Y Z rotation Specify whether the line end shall rotate freely be fixed or have a rotational spring stiff ness about the X Y Z axis Specified rotational spring stiffness 1s per unit radian Note that from version V4 4 definition of the spring stiffness has been corrected In version V4 3 and earlier values was errone ously defined as per unit degree In DeepC radians is for consistency used for all parameters where the angle unit is not explicitly defined Note however that in Riflex inputfile rotational stiffness is defined as per degree Stress free to static rotation If one or more rotational degree of freedom is not free the user has to spec ify how much the support point will rotate from stress free configuration to stati
173. r of elements on a segment will be specified such that the element length equals the closest length below or equal to the specified element length all elements on a segment ends up with equal length DeepC SESAM 4 58 01 DEC 2010 Program version 4 5 4 13 7 Mesh Number of Elements eg Structure Properties 3 Mesh Densitas E New Mesh Density on Segment New Mesh Number of Elements on Stress Joint Segment Labels Vessels Fields Folder Properties save HTML Report The mesh number of elements dialog looks like Mey Structure Properties Component Buoy End Cone Section Cone Section No Elements Rotation Hin_4 Be New Edit existing NoElements1 I Allow edit Number of elements Mesh number of elements are used to specify the number of elements on stress joint segments They take the following parameters e Number of elements Number of subdivisions on stress joint segments Section 4 17 3 Each element will be modelled with constant cross sectional properties SESAM DeepC Program version 4 5 01 DEC 2010 4 59 4 13 8 Section Axi Symmetric E Structure Properties New Section Axi Symmetric H Ey Utilities New Section Axi Symmetric Non Linear H Vessels New Section Pipe New Section End Cone New Section Cone Labels Fields Folder Properties Save HTML Report The section ax1 symmetric dialog looks like Structure Propenies Section
174. rfaces 3 Materials Mesh Densities Li B lender Compi Fields k 3 Utilities Save HTML Report Vessels DeepC SESAM 4 76 01 DEC 2010 Program version 4 5 The pipe in pipe contact dialog looks like Mi Seros Properties Cone Section No Elements Rotation Hinge Stress Concentration Factor SN Curve Stress Crossectional Parameters Pipe in Pipe Contact alo New Edit existing pipp Allow edit Relative damping level er 05 Compression stiffness Damping coefficient y 0 N s m 2 N s m 2 I Constant stifness Y 10000000 Pa Pa Adal sliding friction G Stiffness curve 9 Frictional stiffness 0 0001 Nm N m CEDE El Sliding velocity limit rr A O Static friction coefficient i E a Dynamic friction coefficient G a s c C E PM re 10 Friction caused by rotation Y Pipe in pipe contact properties are attached to pipe in pipe objects The property is used to model contact effects between inner and outer pipes where each of the pipes are defined as a single line The parameters are defined as follows e Relative damping level Desired relative damping level at estimated eigen period in the pipe in pipe contact spring system Based on specified damping level the stiffness proportional damping coefficient a is calculated by IAMS AMS where RELDAM is the relative damping level AMS and AMSg are are structural mass per unit length of the master pipe and the slave
175. rogram Documentation SINTEF Trondheim Norway 2 MARINTEK 1998 SIMO Simulation of Complex Marine Operations User Documentation MARINTEK Trondheim Norway 3 MARINTEK 1998 SIMO Simulation of Complex Marine Operations Theory Manual MARINTEK Trondheim Norway 4 Torsethaugen K 1996 Model for a Double Peaked Wave Spectrum Sintef Report STF22 A96204 SINTEF Trondheim Norway
176. rth tab in the dynamic analysis options dialog looks like t Dynamic Analysis Options sure 141000 4 j Wave kinematics method Kinematics procedure Upper limit for wave particle calculation Lower limit for wave particle calculation Node step for particle calculation Q E Wave zone kinematics Y Constant Potential Cancel Irregular wave procedure settings are only relevant if Wave kinematics on lines was included on the Irregular Response Analysis tab They include the following parameters e Wave kinematics method Only one option is currently possible to choose kinematics at static positions FFT Wave kinematics for a given node on a line is taken from the wave particle motion at the static line position DeepC SESAM 4 152 01 DEC 2010 Program version 4 5 e Kinematics procedure Two options exist Automatic Automatic Selected lines Automatic Wave kinematics will be calculated for every Node step for particle calculation node Linear interpolation is used in between Selected lines The wave kinematics specification done on each single line Section 4 17 1 will be used to determine the node step for the line and whether wave kinematics shall be included e Upper limit for wave particle calculation No wave kinematics will be computed above the upper limit e Lower limit for wave particle calculation No wave kinematics will be computed below the lower limit for wave particle calc
177. s DeepC Yg 2 01 Date 17 Deo 2008 10 20 36 riserl Riser6inchBottom Element 14 Te 0 2 0 50 4 06 0 0 9 0 0 0 9909999 Probability 0 0s 0 1 0 02 565 142 1056 63 1515 04 ZU ST 210115 11597 ZO S w155 ST 4 1 riseri_RiserbinchBottorm_Element_14_Te 3 parameter Weibull fit i Scale 214178 3 Location 79130 9 Shape 1 69025 s Ordered Force Response KN Location riser RiserbinchBottom_Element_14_Te Sample Cumulative Distribution Function lt DeepC SESAM 3 10 01 DEC 2010 Program version 4 5 e High and low frequency filtering of all types of time series DeepC D2 3 07 Date 29 Oct 2004 10 33 04 LF riser Riserbinch Element 10 My7 a ko a E z a E g O Fa LL ii ik ko ei LL m O a E 8 8 al gt 0 200 400 600 00 1000 Li Min 99566 86 Max 1022 LF_riser1 Riser inch Element 10 My1 Mean 101035 Std 459 095 e Range curves of effective tension showing max min mean and standard deviation along the lines e Energy spectra of all types of time series Deep D2 3 07 Date 29 Oct 2004 10 35 13 riser Riserbinch Element 10 My2 1 564008 16 008 i 5e 00 0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 1 MomentOfForceEnergyD ensity Spectrum N 2 m 2 5 Circular Frequenc riser Riserbinch Element 10 My2 50 3 37082e 007 51 198094e 007 52 1 21246e 007 53 7 SESAM DeepC Program version 4 5 01 DEC 2010 3 1
178. s SESAM DeepC Program version 4 5 01 DEC 2010 4 79 The SN curve dialog looks like t Structure Properties Component Buoy End Cone Section Cone Section No Elements Rotation Hinge Stress Concentration Fe 4 gt BE New Edit existing SNCurve I Allow edit Logal Y fi 1 455 Predefined curves k Y 0 25 Reference thickness ref 4 Fill with predefined Cutoff 7 Tubularjoint Y Slopes and shifts Y Curve tt_ref 1 100 Stress range MPa 10 10000 1e 006 1e 008 1e 010 Number of cycles OF Close Apply SN curves are attached to segments and used in fatigue calculations The curve may contain as many break points as the user wants Each linear in logarithmic space section of the SN curve is defined by the fol lowing formulae k Ag E l ref According to this formulae the user should define the following parameters logi N log10 a mlog10 e Logal logl0 a from the first leftmost linear section of the SN curve e k Thickness exponent Same for all linear sections of the SN curve e Reference thickness t_ref t ef from above formulae When the cross section thickness becomes larger than the reference thickness the fatigue properties of the cross section are not as good t t will never be taken smaller than 1 0 e Cutoff A cutoff stress may be specified e Slope m from above formulae Should be given for each linear section of the SN curve DeepC SESAM
179. s 3 Environment 3 Fatigue 3 Results E E3 Dynamic Results 3 Distributions 29 Filtered Time Series H Fatigue Results H E Static Results DeepC 4 191 Range Max Min Range Mean Stdw Range Statistics Select Result Coordinate P Select Result Component When Range Mean Stdv is chosen the mean standard deviation is plotted along the line 1 e every point on the graph corresponds to one element end where mean and standard deviation has been calculated from the element end time series at Graph Window Jele Dept D2310 Date 06 Dec 2004 Gai sample Mean and Stav for riser z j E 2 wh E m j gt m LL a00 1000 1200 Line Coordinate m DeepC SESAM 4 192 01 DEC 2010 Program version 4 5 4 24 10 Range Statistics 3 Analysis Range Max in Range Mean Stdy Range Statistics Select Result Coordinate Select Result Component P E Spectra Jeja Ceept 022 10 Date 06 Dec 2004 Canes sample statistics for riser m m m mam m mm mm Te a s T Ta a 7 m EEN ee miiia a m p rE wn a H E wa E o imi a T LL 500 1000 120 skewness Kurtosis ee SESAM DeepC Program version 4 5 01 DEC 2010 4 193 4 24 11 Select Result Coordinate 3 Environment 53 Fatigue 3 Results a O Dynamic Results gark 19x5 Range Max Min Range Mean Stdy Range Statistics
180. s taken from the average value e Ovality Pipe ovality e External corrosion External corrosion allowance e Internal corrosion wear Internal corrosion and wear allowance 4 13 22 Fluid Combined Loading structure Properties Ea Combined Loading New Material Combined Loading Ey Fatigue aden ERA Load Interfaces New Pipe Combined Loading ES Materials h CJ Mesh Densities Fields C Sections save HTML Report EJ Slender Components Utilities Vessels H E DeepC SESAM 4 84 01 DEC 2010 Program version 4 5 The fluid combined loading dialog looks like t ud Combined loading C New Edit existing FluidCombinedLoadingl M Allow edit External fluid y Density 1025 Kg m 3 Ka m 3 Pressure gt Reuse Fa Zrel Reuse mn Internal fluid Es i Internal fluid included Density 800 Kg m 3 Kg m 3 Pressure Ge 34500000 Pa Pa el Fluid combined loading properties consists of external and internal fluid data required for pressure calcula tion The properties are attached to lines and stress joints e External fluid Density Density of the external fluid If the keyword Reuse is selected the fluid den sity used when calculating riser forces i e the value from the environment location is reused in the combined loading analysis e External fluid Press
181. s that typically have to be performed when modelling in DeepC and the order in which to perform them 4 7 1 Rules a Specify input units Section 2 15 b Specify tolerances Section 2 22 4 7 2 Environment Modelling a Create a seabed property Section 4 11 6 b Create an environment location Section 4 11 16 c Create a regular irregular scatter diagram under the location A scatter discretization is required when fa tigue analyses shall be employed Section 4 11 17 d Create a scatter discretization under the scatter diagram Section 4 11 18 e Create multiple wave spectrums based on the scatter discretization Section 4 11 19 f Create direction properties for all relevant wave wind and current directions Section 4 11 5 g Create spreading function property if short crested waves shall be used Section 4 11 14 h Create all relevant wind spectrums Wind is only used if coupled vessel line motion shall be employed Section 4 11 1 1 Create all relevant wind profiles Wind is only used if coupled vessel line motion shall be employed Sec tion 4 11 4 j Create all relevant current profiles Section 4 11 15 k Create multiple irregular time conditions from the scatter discretization Section 4 11 20 Create multiple regular waves Section 4 11 21 m Create multiple regular time conditions Section 4 11 22 SESAM Program version 4 5 4 7 3 Vessels Modelling Create a new vessel Section 4 15 1 Read vessel data Section 4 15 2 Read vessel geometry
182. section the same tab looks like Geometry Axial Stifness Bending Stifness Torsion Stifness Mass pr length 0 317 tonne tonnen External cross area 0 2027 m 2 m 2 Internal cross area 0 164 m 2 m2 Radius of gyration 0 171 m m O Outer contact diameter Ge m Uninet contact diameter Q7 m The following parameters must be given e Mass per length Mass per unit length of cross section e External cross area Area used to calculate buoyancy and wave forces on segment SESAM DeepC Program version 4 5 01 DEC 2010 4 63 e Internal cross area Area used to calculate weight of internal fluid if any e Radius of gyration Radius of gyration about segment local x axis e Outer contact diameter Outer contact diameter for pipe in pipe contact If not specified the cross sec tion outer diameter will be employed e Inner contact diameter Inner contact diameter for pipe in pipe contact If not specified the cross section inner diameter will be employed Axial stiffness is specified on the second tab It looks as follows depending on the selection of homogene ous pipe or not and whether or not the stiffness shall be constant f Homogeneous pipe Yet General Y Youngs modulus 200 GPa Pa Geometry Axial Stifness Bending Stiffness Torsion Stifness le Constant axial stiffness Axial stifness curve 4 Calculated based on Youngs modulus DeepC SESAM 4 64 01 DEC 2010 Program version 4 5 f H
183. ser Spectrum 10 21 an 40 Wave Period T Cancel Apply A set of angular frequencies and corresponding wave spectrum densities are given 4 11 13 Regular Wave CurProf Current Profile dl CurProfs Current Profile Er i Jong Jonswap Spectrum i Jong Jonswap Spectrum Jonswap Spectrum rn swap Spectrum operties swap Spectrum Wee ee sap Spectrum 1 33 Stuctun New Discretized Spreading Function swap Spectrum H E Utilities Mew Current Profile swap Spectrum Huy Vessels ICE Ee ee gular wave Heic gular Wave Heic SESAM Program version 4 5 01 DEC 2010 The regular wave dialog looks like Liireate Ed t Regular Wave C New Editexisting Iv Allow edit Name RegularWave_1 8x5 Period 14s 5 Height Amplitude 5m m Cancel e Period Wave period for each wave in the regular wavetrain DeepC 4 25 e Height or Amplitude Specify wave height or amplitude When converting between height and ampli tude the formula amplitude height 2 is used 4 11 14 Spreading Function ud Properties Wave Spectrum New Current Profile FI I 53 Utilities Paste Fields Folder Properties Save HTML Report DeepC SESAM 4 26 01 DEC 2010 Program version 4 5 The spreading function dialog looks like Li Create Edit Spreading Spreading function New Edit existing Spreading Exponent 2 Number of directions 7 Must
184. sion 4 5 Specify the type of axis linear In log10 log10 log10 Specify manual x y axis end points limit Specify whether to show grid lines inside the graph window Axis color Manually specify where the axis numbering and ticks shall occure The last two tabs Lines and Settings are used to specify line types colors point sizes etc 2 20 Grid Controls The grid controls are used in many dialogs zim Direc an Teles PAR weld om 7 a Current direction counter Clockwise from global x axis 2 79 85 m 0 deg 0 945 mes i 79 9 mi 0 deg 0 122 ms 4 635 1 3 m 0 deg 0 122 ms 5 Position the mouse cursor over the first row to see useful hints of what is defined in each column Data can be copied from Microsoft Excel and pasted into grid controls This is done by copying the entries in Excel positioning the cursor in the relevant upper left cell and pressing Ctrl V Multiple rows are selected by dragging the mouse cursor along the first column keeping left mouse button pressed To copy multiple entries from a grid control select entire rows as described above and press Ctrl C to move the cells onto the clipboard Add more rows in grid controls by positioning the cursor in a cell in the bottom row and press the down arrow Some grids also permit adding more columns This is done by positioning the cursor in a cell in the right most column and pressing the right arrow SESAM DeepC
185. ss Joint E E Support ES eb Utility EH Vessel Es 3 Utility Selection Working Set Active Default display Save s Delete caca ten This page is essentially a tree view of all the different object types that can be visualized Click on the eyes in the tree to set the object types visible invisible Double click the properties like color and transparency to change their value SESAM DeepC Program version 4 5 01 DEC 2010 2 19 One item here that may seem a little mysterious is the Working Set Inactive folder Model Property pa fy Utility Selection GJ Hide Interaction Working Set Active EJ Line Draw Mode J Working Set Inactive O Part OF Extent FJ Hide Interaction Selectable E Line Draw Mode Transparency O Part Of Extent lt gt Visible Selectable Transparency lt gt Visible omm 13 Defaut display Save s Delete card tom Working Set Inactive 1s related to the visible model object set that you get access to when you right click an object in the 3D window Named set View options Show selection only Alt 5 Add selection Alt Plus Remove selection Alt inus Show all Alt A Show complement Alt O Using these commands you can add or remove objects from the visible model object set All objects whose eye is open in the tree and that are part of the visible model object set will be visualized with settings according to the their object type in the tree
186. symmetric Sections C Cone Sections Pipe Sections 9 Slender Components 23 Buoys CJ Internal Fluids Rotation Hinges PPL e Combined Loading Contains material pipe cross section and fluid properties for combined loading analyses only SESAM DeepC Program version 4 5 01 DEC 2010 4 49 e Fatigue Contains SN curve stress concentration factor and cross sectional properties for fatigue analy ses only e Load Interfaces Contains Morison coefficients segment external wrapping and segment marine growth properties e Materials Contains material definitions e Mesh Densities Contains mesh density properties for segments and stress joints e Pipe in Pipe Contact Contains pipe in pipe contact characteristics damping friction and stiffness e Sections Different kinds of cross sections for segments and stress joints pipe axi symmetric etc e Slender Components Internal fluid buoy common properties rotation hinge properties stress concen tration factors SN curves and section stress parameters 4 13 Structure Properties Data Types 4 13 1 Cd Buoy 1 3 Structure Properties 3 Load Int LJ Materials sq Mesh De New Cd Segment h Ey Sections New External Wrapping og Slender New Marine Growth Utilities Vessels Fields Folder Properties Save HTML Report H H DeepC SESAM 4 50 01 DEC 2010 Program version 4 5 The cd buoy dialog looks like Miera Brun aries Mesh Density
187. ta PES ctenascaeuea hens ae sarees A N eo ee 4 11 ALL LE NED A os 4 11 A A A Pn 4 12 Aia Davenport WAS PECAR N EEE EA da 4 13 AEEA o A ne a Or BIOS RB PRE Pe FRR OR cei Dore eee One re 4 14 AS O eel EEA 4 15 AMG sSCaWeG Proper y ge ckicie ascalss Mace a 4 16 AAA JOHNS Wap o Para Mel io ll soon 4 17 AS JONS Wap d Para 4 19 A UM Pierson IOS KO yA kaa sat aX 4 20 4 11 10 Bretschneider 2 Parameter Pierson MOSKOVItZ ccccccccececccceeccceeecceeeeeeeeeeeeeeeeaaaaas 4 21 4 11 11 Torsethaugen Double peak Jonswap spectrum with 2 parameters ccccccccnnnnnnnnnnnnnn 4 22 AAA 1S User Defined Wave Sp ctrUnieseseiseis oi irea REEE et crease ostinato 4 23 Ak Se IRS OVER Wave caii N E EA E TONS 4 24 Al lA Spreadmne UNC E AEON 4 25 AALS Curent Prole sirrin nne N E ENO E UTEE 4 26 bhor TAO Ald Oene A E AEA ET 4 27 AU CASTA A cia 4 31 ATTELS Scale EDICTS ILMO A ae ee 4 32 ALTO Multiple Waves poc osado 4 36 4 11 20 Multiple Irregular Time Conditions ooooooooonnnnnnnncnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnannnnnannnnnnnn nr nn nnnnos 4 38 4 1121 Multiple Re ud a e e e da do haieaaaa 4 40 4 11 22 Multiple Resular Time Conditions 100 dae tte ec es 4 42 4 11 23 Sincle regular Time Condition aaa 4 43 24124 eee what Time OI as 4 47 Structure Properties Data Organization sii lt iccsccssnoesssenasseessnnsenaacaccansscdsedasavnbessessbsesedendavedonebesssvaviads 4 48 Structure Properties Data LPS as 4 49 A CAD iaa 4 49 7 bs AP O See OA
188. thickness correction factor in SN curve 4 13 20 Material Combined Loading Structure Properties E combined Lodi ES Fatigue he Sg Load Interface Mew Pipe Combined Loading Ea Materials New Fluid Combined Loading Mesh Densities Fields Sections Save HTML Report 23 Slender Componente 3 Utilities Vessels The material combined loading dialog looks like b C New Edit existing MaterialCombinedLoading i Allow edit Young y 2 05e 011 Fa Fa Poisson vw 103 480000000 Pa Fa Strength ratio Y i Fabrication strength reduction factor ve Yield F A Apply OF Close Materiel combined loading properties are attached to line and stress joint segments e Young Elastic modulus If the keyword Reuse is selected the value used when calculating riser forces is reused in the combined loading analysis Note that this require that a material property has been speci fied for the particular segment Section 4 13 5 DeepC SESAM 4 82 01 DEC 2010 Program version 4 5 e Poisson Poisson s ration If the keyword Reuse is selected the value used when calculating riser forces is reused in the combined loading analysis Note that this require that a material property has been specified for the particular segment Section 4 13 5 e Yield Characteristic yield strength including possible temperature derating effects and material strength factor if relevant
189. tically generate new names e Structural analysis Select the structural analysis for which the combined loading analysis will be based on e Settings The edit button is only relevant after the apply button has been pressed Pressing this button will activate the combined loading analysis dialog Section 4 22 1 of the analysis in the given row e Capacity check This column shows the capacity check settings for each analysis SESAM Program version 4 5 01 DEC 2010 4 22 3 Run Combined Loading Analysis H 53 Results H E Structure i Ball Joints Buoys Supports lActivity Monitor kh 3 Converting CL Ana 14 10 090 Journal activity executions Duration 2321 CL na 14 10 DO Combin ME 2 CL Ana 14 10 _D45 Combi Faste Fields Cave HTM Reannrt New Combined Loading Analysis Multiple Analysis Run Combined Loading Analysis he All Activities Dialog 1B Oz M 33 Cl_ na 14 10 0 90 Combi AE 4 Cl_4na 14810 0135 Com B25 CL_Ana_14 10_0 180 Com Status Warming W amning Running DeepC 4 179 This dialog is used to execute all the combined loading analysis that are selected in the list Relevant actions for each analysis can be reached by right clicking the analysis in the list 4331 CL Ana 14 10 00 Combin 16 Duration Statues Warming DeepC SESAM 4 180 01 DEC 2010 Program version 4 5
190. ties are specified e SCF Stress concentration factor Section 4 13 17 SN Curve Number of cycles to failure curve Section 4 13 18 e Stress Parameters Specify stress characteristics of segment cross section Section 4 13 19 4 17 6 Edit Combined Loading Properties riser riser Move End Copy Delete Rename Edit Line Edit Fatigue Properties Edit Q Properties Comnute ine Shane The segment combined loading properties dialog looks like t Segment Combined Loading Properties 3 Line riser A Internal E sternal fluid FlkidCombinedLoadingl had A ___ Segment Material Section RE MaterialCombinedLoading1 PipeCombinedLoading MaterialCombinedLoading1 PipeCombinedLoading1 MaterialCombinedLoading1 PipeCombinedLoading1 Cancel The dialog is used to specify combined loading properties for the selected line Specification of the proper ties is required for riser combined loading calculations The following properties are specified e Material Combined loading material property for each segment Section 4 13 20 e Pipe Combined loading pipe section property for each segment Section 4 13 21 DeepC SESAM 4 126 01 DEC 2010 Program version 4 5 e Internal External fluid Combined loading internal and external fluid property for the line Section 4 13 22 4 17 7 Ball Joint E 3 Structure By Bal Joip aa tae New Ball Joint y 9 Suppor
191. tilizatioin factor Combined Loading Results display type must be selected on the view toolbar Qe 7 ww SD Combined Loading Re DeepC 4 182 SESAM 01 DEC 2010 Program version 4 5 The contour plot is then visualised in the 3D view Component Utilization factor sample Min 0 1807247 Wax 0 754376 hot 0 754326 O 6969 0 639512 0 582 104 524696 46200 40993 S524 71 0 295083 0237655 0 180247 LI Ir 1 I 1 Ir 1 _ r _ r T e Fr By using the Set Current option the user may switch view of combined loading results between different analyses tz CL AnaReg 14 10 DO tz CL AnaReg 14 10 D45 Combined Loading Analysis tz CL AnaReg 14 10 D90 Combined Loading Analysi TEEL Ana 14 TEEL Ana 14 ECL_ Ana 14 TEEL Ana 14 TEEL Ana 14 tF CL_ template Combined Loading Analysis Rename Exit Run Combined Loading Analysis View Result Cdifoonent sae Show Listing File Copy Paste SESAM DeepC Program version 4 5 01 DEC 2010 4 183 By using the View Result Component option the user may switch between sample and statistical extreme results tz CL AnaReg 14 10 D0 Combined Loading Analysis tz CL AnaReg 14 10 D45 Combined Loading Analysis p4 CL AnaReg 1410 090 Combined Loading 4nalysis ECl_Ana 14 Delete ECL_ na 14 Rename HCL Ana 14 Edit ECL_Ana 14 ECL_ na 14 Run Combined Load
192. tions The hydrostatic restoring dialog looks like Support Vessel Reference position for zero stifness Position A angle Udeg deg Point 0 m 60 m 0 m Y angle Odeg deg Z angle deg deg Hydrostatic restoring matrix DeepC eC ns TES AR onm onm onm bon n ON 2 fomm jowm jowm fon on on 3 Jowm owm manasno A TN a on pn on _ avt2eiaesen mlonm 06137237549 1711197312 N m 3 568857362e 011 N m eon jon jon onm onm onm O Cancel Original values for the hydrostatic restoring are extracted from the vessel G SIF file Section 4 15 2 but these data can be edited DeepC SESAM 4 94 01 DEC 2010 Program version 4 5 e Position Reference position of vessel in global coordinates at which hydrostatic restoring force is zero Usually equal to the vessel initial position e X Y Z angle Reference angles at which hydrostatic restoring force is zero Usually equal to the vessel rotation angles Defined as Euler rotations about the X Y Z axes in a local coordinate system The origin is at the vessel initial position and initially the axes are parallel to the axes of the global coordinate sys tem Rotations about the Z axis is performed first then about the intermediate Y axis and at last about the intermediate X axis e Restoring matrix Give the terms of the hydrostatic restoring matrix in vessel local coordinate system 4 15 8 Linear Current J Vessels semi dd Suppl Delete Ren
193. tions In the following example a Hs Tp scatter discretization is used SESAM DeepC Program version 4 5 01 DEC 2010 4 33 The scatter discretization dialog looks like MY Serrar Wiepsrrention Define blocks Y Insert new block oF q Bixs_4 2 B3x5_6 Remove active block yt Auto Fill tools Auto fill name Hs T p T Delta Hz 3 mn Delta Tp 3 z aoe Select cels 4 Cancel Apply J Since every time domain simulation of a seastate may be relatively time consuming it is not practical to per form a simulation for every possible seastate Instead one typically divides a scatter diagram into larger blocks and runs one or sometimes a few analysis for each block A scatter discretization is used to define these blocks Scatter blocks are defined interactively in the dialog by selecting cells in the bottom table This is done by the following steps e Press the Insert new block button to start a new block DeepC SESAM 4 34 01 DEC 2010 Program version 4 5 e In the top table set the newly created block active Define blocks we Block Name Color ACTIVE Insert new block wv Remove active block 9 Srita Fill tanle e In the bottom table select the relevant cells in the scatter diagram This is done by pressing the left mouse button on a cell in the table and keeping it pressed while dragging the mouse A single cell 1s selected by double clicking left mouse button in the cell S
194. to write all commands in a scripting file js file and load this file into DeepC mi Edit View Insert Help Tools LY New Workspace Ctrl 4N Open Workspace Ctrl 0 Led Save Workspace Ctrl s Close Workspace Save Graphics As Print Graphics Recent Command Files Recent Workspaces Save report Save Clean JS Exit Alternatively one may write the connected commands like the two for loop lines in an editor like Note pad and then copy and paste them into the command line window in DeepC press Ctrl v to paste Also note that it is possible to zoom Shift RMB and pan Ctr1 RMB in all edit windows including the scripting and messages windows 2 17 Save Clean JS From the File menu the Save Clean JS command can be reached Edit View Insert Tools Help L New Workspace Open Workspace i Save Workspace Close Workspace Save Graphics As Print Graphics Read Command File Recent Command Files Recent Workspaces save report SESAM DeepC Program version 4 5 01 DEC 2010 2 27 This will produce a scripting file containing all the objecs in your workspace 2 18 Batch DeepC can be run in batch from the command line with a scripting file Write DeepC alternatively the full path to DeepC if DeepC is not included in the environment variable PATH in a command window to see how the command
195. ulation e Node step for particle calculation Only relevant with kinematics procedure automatic Wave kinemat ics will then be calculated at every Node step for particle calculation node Linear interpolation is used in between e Wave zone kinematics The following options are available for wave zone kinematics onstant Potential Mean Water Level Stretch Potential Move Potential Mean water level Wave forces are calculated up to mean water level Stretch potential Wave forces are calculated up to free surface by stretching compressing the wave potential Move potential Wave forces are calculated up to free surface by moving the wave potential Constant potential Wave forces are calculated up to free surface by keeping the potential constant from mean water level and up SESAM DeepC Program version 4 5 01 DEC 2010 4 153 For regular analyses the fourth tab in the dynamic analysis options dialog looks like ti xX Nondinear Iteration Procedure Regular Wave Procedure Animation setup alr Wave kinematics method Static Position K Wave zone kinematics e Constant Potential x OF Cancel Apply The parameters are e Wave kinematics method Two options exists for obtaining wave induced velocities and accelerations along the lines Instantaneous position Wave kinematics are calculated at the instantaneous dynamic positions Static position Wave kinematics are cal
196. uld for instance be to position the riser on the seafloor in stress free configuration and lifting the upper end up to the vessel during the static analysis A different alternative would be to position the line horizontally at the upper end point in stress free configuration lowering the line down to the seafloor during static equilibrium analysis These two stress free configu rations can produce different seafloor friction forces on the line and accordingly completely different solutions It is generally easier for the static equilibrium solution to converge if the stress free coordinates are as close to the resulting static equilibrium position as possible Lines that are rigidly connected rotation is fixed should have the same angle between them in the stress free configuration as in the final static equilibrium position 4 17 5 Edit Fatigue Properties Move End Copy Delete Rename Aisen 3 Support Edit Fatigue Properties Edit Combined Loading Prisferties Properties The segment fatigue properties dialog looks like 14 Sesmentiaticue Properties T ase ECC SressPropertes Rise StressPropertes Rise StressPropertes carcel amy SESAM DeepC Program version 4 5 01 DEC 2010 4 125 The dialog is used to specify fatigue properties for segments of the selected line Specification of the proper ties is required for fatigue calculations For each segment the following proper
197. ure External pressure at vertical reference position If the keyword Reuse is selected the reference pressure is taken from the environment location This requires the Z ref value also to be specified as Reuse e External fluid Zref Vertical reference position for external pressure Given as Z coordinate in global coordinate system If the keyword Reuse is selected the reference position is taken from the environ ment location This requires the Pressure value also to be specified as Reuse e Internal fluid Density Density of the internal fluid If the keyword Reuse is selected the internal fluid density used when calculating riser forces is reused in the combined loading analysis e Internal fluid Pressure Internal pressure at vertical reference position SESAM DeepC Program version 4 5 01 DEC 2010 4 85 e Internal fluid Zref Vertical reference position for internal pressure Given as Z coordinate in global coordinate system 4 14 Vessel Data Organization Vessel data are organized in the following main folders E E3 Vessels E semi jf semi_Fairleads H S supply_boat e Vessels Folder containing all vessels e Fairleads Folder under each vessel containing the vessel fairleads vessel to lines connection points 4 15 Vessel Data Types 4 15 1 New Vessel E Ey Vessel Fields Folder Properties save HTML Report The new vessel dialog looks like bd New Vessel Vessel name t
198. used as properties of flex joints 4 13 2 Cd Segment The cd segment dialog looks like A SESE Properties Structure Properties New Cd Buoy New Cd Segment New External Wrapping New Marine Growth Fields Folder Properties Save HTML Report Mesh Density on Segment Pipe Linear Isotropic Material Cd Buoy Cd Segment intemal Fluid Etem 4 gt f New Edit existing Hydrodynamic Load4 DeepC SESAM 4 52 01 DEC 2010 Program version 4 5 The tangential force per unit length is calculated as Ft CDX VRELX VRELX CDLX VRELX The force acting normal to the local x axis is calculated as F CDY VRELY VRELZ CDLY VRELY VRELZ If Use dimensional coefficients is selected the fields in the dialog have the following interpretation e Quadratic Drag Cqx CDX e Quadratic Drag Cqy CDY e Added mass Cax AMX e Added mass Cay AMY e Linear drag Clx CDLX e Linear drag Cly CDLY When Use dimensional coefficients 1s not selected the fields in the dialog have the following interpreta tion CDX Ya Poy Cat CDY Ya pD C n CDLX pJaSw SwCat CDLY pafgD D Cy 2 TD AMX a Ca 1D AMY p 4 a p water density g acceleration of gravity 5w cross sectional wetted surface TD D hydrodynamic diameter of the pipe Cdt 7 nondimensional quadratic tangential drag coefficient Cin nondimensional quadratic normal drag coefficient
199. ver also an additional field Set Boundary Conditions After the names and coordinates have been SESAM DeepC Program version 4 5 01 DEC 2010 4 107 defined the user must press the apply button Once this has been done the user gets access to the Set Boundary Conditions buttons When one of these buttons are pressed the following dialog will appear t Defne palrlese gt C New Edit existing semifaillead 1i2_u Connect to vessel z Point E e ee Coordinate system y Vessel O Yeesel skew vector Prector3d 1 m0 m0 m vector Cctor3d 0 m0 m 1 m Fixed Free A translation i Y translation a amp translations c rotablon Y rotation o rotation e E Stress free to static rotation O f Specify rotation Calculate from angle with global 1 plane Direction 24 5840898 de deg Angle with global Y plane E deg deg soy OR e FRatation The local coordinates of the fairlead are again listed on top The rest of the dialog is used to define the boundary conditions for the fairlead Point Local vessel coordinates of the point at which the fairlead is defined By selecting a point in the 3D window the control will be automatically filled Coordinate system Vessel The line to fairlead stiffness properties are referred to the vessel local coordi nate system Coordinate system Vessel skew The line to fairlead stiffness properties are referred to a skew coor
200. x axis DeepC 4 16 01 DEC 2010 4 11 6 Seabed Property Environment E Directions E EDDY location a Properties New Seabed property Paste Fields Folder Properties save HTML Report Seabed Dim Normal stiffness 3550 Pa Pa Longitudinal stifness a Pa Pa Transversal stiffness 0 Pa Pa Longitudinal friction coefficient Transverse friction coefficient Cancel Apply SESAM Program version 4 5 Seabed properties are used to model stiffness and friction coefficients on the seabed in hydro locations They use the following parameters e Normal stiffness Stiffness in the vertical direction e Longitudinal stiffness Horizontal stiffness in the line axis direction e Transversal stiffness Horizontal stiffness in direction normal to the line axis e Longitudinal friction coefficient Friction coefficient in the line axis direction Friction force increases up to a maximum value of friction coefficient vertical force e Transverse friction coefficient Friction coefficient in direction normal to the line axis SESAM Program version 4 5 4 11 7 Jonswap 3 Parameter Ef Air sq Directions EDDY location ete SOEs Paste Fields Li Greate Edit Wave Spectrum Jonswap 3 Jonswap 5 Pierson Moskowitz Bretsc New Edit existing WaveSpectrumg Dim Peakedness 22 Significant wave height 11 89m Im P
201. y Section 4 13 14 e Hydrodynamic load Select hydrodynamic load coefficients for the buoy Section 4 13 1 SESAM DeepC Program version 4 5 01 DEC 2010 4 129 4 17 10 Support Point oe Structure 33 Ball Joints B Ly Vessels colder Properties save HTML Report The support dialog looks like i x gt C New Edit existing Support Point 4 Point 0 rm m 380 m Coordinate system 42 Global C Skew sector PMector3d 1 m0 m O m vector Mectorad D m0 rm 1 m Fited Free Spring Spring stiffness A translation ie C if M m Y translation ir Nm Z translation e Mm 8 rotation A i N m E N M S O Y rotations 9 10 i Nm Z rotation Ge C E s N rn Stress free to static rotation e Specify rotation Calculate from angle with global lt Y plane Direction 0 deg deg Angle with global lt Y plane y Rotation 0 deg deg jo deg deg Apply OF Close DeepC SESAM 4 130 01 DEC 2010 Program version 4 5 Support points are used to connect line ends to the seafloor or other fixed points in space They are defined by the following input Point Global coordinates of the point in space at which the support lies By selecting a point in the 3D window the control will be automatically filled Note that it s not allowed to have a support and a fair lead in the same position For coupled motion vessels it s not allowed to have su
202. y also be edited and used as input to a new session The journal command file provides full unit support and conversion between units 1 2 DeepC in the SESAM System DeepC is an integrated part of the Sesam system Prior to running DeepC the geometry of the large volume floaters must be modelled Applications like Prefem and Sesam Patran Pre can be used These models must be run through HydroD Wadam to calculate frequency domain added mass potential damping and excitation forces which is input to DeepC Once HydroD has been run DeepC takes full control of the analysis All remaining modelling and post processing is done within the DeepC environment Online Documentation DeepC SESAM 1 2 01 DEC 2010 Program version 4 5 DeepC comes with an HTML based on line help system Its purpose is to provide easy access to all relevant documentation including this manual In addition it contains a hyperlinked detailed documentation of all available commands in the journalling system see Chapter 5 Since the online documentation is HTML based you can browse all the information using the browser of your own preference 1 3 How to read the Manual e Read Chapter 1 INTRODUCTION to obtain a brief overview of DeepC e Read Chapter 2 APPLICATION FRAMEWORK to learn about the graphical user interface and the generic tools that are employed in DeepC and the other Sesam programs e Read Chapter 3 FEATURES OF DEEPC to find out what you can do with DeepC e
203. you can open the move dialog Vector3d 0 m Om 10m 7 Two points e Unit vector Normal vector of the plane EE I Preview tem OK Cancel There are several advantages to working with sets By selecting a set in the browser all the objects included in the set will be selected and highlighted in the 3D graphical view Use the set to display your model apply properties moving etc The move dialog lets you do a number of remodelling operations Note that it is not allowed to include vessels in a set 2 9 Tooltips k x o Thickness Exponent F Ge E Specify thickness exponent on fatigue strength k logi N logl0 a mlogl0 sr En t ref 6 Many of the dialogs are equipped with tooltips that pop up when the user positions the mouse cursor over them There are two main types Gz Provides specific information related to a single control in the dialog Provides general information of the work process purpose of a dialog Many of the tooltips provide vital information to the modeling process DeepC SESAM 2 12 01 DEC 2010 Program version 4 5 2 10 Reporting From the File menu the save report dialog can be reached A Edit View Insert Tools Help L New Workspace Ctrl HN Open Workspace Cirl o 5 Save Workspace ctrl 5 Close Workspace Save Graphics As Print Graphics Read Command File Recent Command Files Recent Workspaces j Save Cl
204. ysis Opti hs jes Dynamic analysis Options Export Execute Analysis View Static Configurations Start Xtract Response Post Processing Read All Results Read Static Results Read Dynamic Results Read Vessel Results Information Copy Paste DeepC SESAM 4 136 01 DEC 2010 Program version 4 5 The first tab in the response storage dialog looks like File ster Envelopes Nodal Response Force Response Curvature Response Decomposed F Compute envelope curves Time window for computing envelopes Time interval Start time 10s Is End time 43200 s 5 Envelope curves give maximum and minimum mean and standard deviation skewness and curtosis values of displacements forces and or curvature along the lines The following input is given Time interval The time window for computing envelopes is given by a start and end time This is the only relevant option to specify the time window for irregular analyses Start End time Specify the time interval from which you want envelopes extracted Number of periods For regular wave analyses this option may be selected The time window used will be taken from the end part of the time series The length of the time window will be the number of peri ods specified times the regular wave period Displacement Forces Curvature Include envelopes for displacement forces curvature SESAM DeepC Program version 4 5 01 DEC 2010 4 137 The second tab in the r

DeepC User Manual

Contents

Download Pdf Manuals

Related Search

Related Contents