ArchimedesMB User Manual
Contents
1. Z pie ff OM Rte ee ON Vid pif ff Me ek TE Note also that the Y axis runs along the keel Draughts in Archimedes are measured along the Z axis above the origin i e from Z 0 0m While this is the recommended system for setting up and running models it is by no means required and the system is designed to analyse floating bodies in general and so a system is required that is not soley tied to a traditional vessel axis system Where this can offer confusion to traditional analsysis we will endeavour to draw the users attention to alternative means of interpretation and clarify Offsets and Section Data The fundemental building blocks of models in Archimedes are offsets These are pairs of double precision floating point values which always lie on the local X Z plane These are grouped together in an array to allow a description of a 2D polygon called Sections in Archimedes The software assumes a closed section and assumes the last offset entered is connected to the first as shown in the image below note offset indexed 35 is connected to first indexed 0 2006 www naval architecture co uk Background Theory 34 4 500 m 4 000 m 3 500 m 3 000 m 2 500 m 2 000 m 1 500 m 1 000 m 0 500 m 0 000 mer 3 000 m 2 500 m 24 000 m 1 500 m 1 000 m 0 500 m 0 000 m 0 500 m 1 000 m 1 500 m 2 000 m 2 500 m 3 000 m Valid Sections Sections are anala2. ArchimedesMB User Manual 2006 www naval architecture co uk Introduction ArchimedesMB Free for Personal Use by John A MacSween ArchimedesMB may be freely copied and distributed for personal use only If it is commercially used then it MUST be registered In this way you can guarantee the continued developement of the software We hope you like the software and we always appreciate feedback on what we can do to improve the software so please email us at info naval architecture co uk ArchimedesMB User Manual 2006 www naval architecture co uk All rights reserved No parts of this work may be reproduced in any form or by any means graphic electronic or mechanical including photocopying recording taping or information storage and retrieval systems without the written permission of the publisher Products that are referred to in this document may be either trademarks and or registered trademarks of the respective owners The publisher and the author make no claim to these trademarks While every precaution has been taken in the preparation of this document the publisher and the author assume no responsibility for errors or omissions or for damages resulting from the use of information contained in this document or from the use of programs and source code that may accompany it In no event shall the publisher and the author be liable for any loss of profit or any other commercial damage caused or
3. Back Cover
4. Tips for tracing body plans Create two sperate appendages one for the fwd sections and one for the aft sections These can then be mirrored seperately Ensure all sections are cleaned up and moved to lie on CL before mirroring Best to tidy up each station after it has been imported 2 4 2 2 Sample Body Plan Sample Body plan for use in digitising a body plan 2006 www naval architecture co uk 21 ArchimedesMB User Manual Lido Soh ATM a 7 A7 A dE A BS PAIN OL NET RSR I EL TRE Nr a 7 N Id 2 WKS SU ZS ZBL CRE VBE se gt MF Nee IN L I FA OO iM CD MN an CO no k ES f Buttocks spaced at 500mm 2 4 2 3 3D View 3D view allows you to view zoom pan and rotate the model in 3 dimensions To navigate in 3D Left Click zooms in on the view and Right Click zooms out consistent with the 2D views Left Click and dragging rotate the view with Right Click and dragging pans the view The world axis and origin location are represented by coloured arrows pointing along the x y and z axis as follows 2006 www naval architecture co uk 22 Program Operation When the whole model is selected a wireframe bounding box is drawn to represent the model extents 2006 www naval architecture co uk 23 ArchimedesMB User Manual 2 4 3 2 4 3 1 When there are multiple appendages the current appenda
5. Cross Curves and GZ Values Primer on cross curves and GZ curves and how ArchimedesMB calculates them Internal Data and Scientific Constant Representation Where data and scientfic contants are discussed in this manual they are detailed as follows Numerical Representation and Range Type Size bits Range Sample applications unsigned char 8 0 lt X lt 255 Small numbers and full PC character set char 8 128 lt X lt 127 Very small numbers and ASCII characters short int 16 32 768 lt X lt 32 767 Counting small numbers loop control unsigned int 32 0 lt X lt 4 294 967 295 Large numbers and loops int 32 2 147 483 648 lt X lt 2 147 483 647 Counting small numbers loop control unsigned long 32 0 lt X lt 4 294 967 295 Astronomical distances enum 32 2 147 483 648 lt X lt 2 147 483 647 Ordered sets of values long 32 2 147 483 648 lt X lt 2 147 483 647 Large numbers populations float 32 1 18 10 38 lt X lt 3 40 10 38 Scientific 7 digit precision double 64 2 23 101 308 lt X lt 1 79 101308 Scientific 15 digit precision long double 80 3 37 101 4932 lt X lt 1 18 1014932 Financial 18 digit precision Ref 1 Scientific Constants Acceleration due to gravity g 9 80665 m s 2 2006 www naval architecture co uk 37 ArchimedesMB User Manual 3 7 References 1 Borland C Builder 5 Help File 2 2006 www naval architecture co uk
6. alleged to have been caused directly or indirectly by this document Printed March 2006 in whereever you are located Special thanks to Author We ahve a number of people to thank for the creation of this John A MacSween document and the software itself Software Developer There are various GUI components both freeware and commercial John A MacSween that have been employed and these are acknowledged below Vit Kovalcik for his excellent EasyGraph delphi code which he has gratefully alowed me to butcher to suit my own needs TMS Software for their excellent grid components STEEMA Software for theor excellent graphing components MADSHI for their excelent exception handling and reporting code Martijn van Engelend for the excelent FREEShip software www freeship org many of whose models are featured in this manual and we are gratefull for the inclusion of Archimedes export to allow exchange of files between our software Existing users of Archimedes who acted as very gracious beta testers This release is dedicated to you all Archimedes MB User Manual Table of Contents Foreword 0 Part Introduction 4 T Welcome TOPIC seccina eee Ge ae ee eee anne ant 4 2 lerms and Conditions A na Rs a iaoeia aiaa 4 Part Il Program Operation 6 1 OVEIVIEW ann A E es un 6 2 Menu and Toolbar na no de a nnne 6 Menu and Toolbar OVEN VIGW 2 E AE ADEE nara aR ENNET 6 PIS MEDU ae ne ee ets Rene Radeon fRto nie nant
7. immersed While redundant at this stage it will be used later when weight curves are added allowing the shear force and bending moments to be integrated over the vessels length For more information on working with std tables in Archimedes see Working with Tables in ArchimedesMB Section Area Plots As well as tabular data section area and longitidinal buoyancy values can be represented as graphical plots A sample plot is shown below and for more details on the std interface for editing and viewing your plots see section on Viewing and Editing your Plots Longitudinal Buoyancy Curves for 30m Trawler Hull eet ae ea no Des SN oo A ea i i Jo i i i W Buoyancy I I E i E I I I oe oe ee EEE TAE D E prea a iv Ares sh Lanna ee oe ne Sn ik Le Le Le y ES Ds GF a ae DL os Do gt CS DS rs ne RS oe Va pa taininenese es s NES D sei ds sl ne oo n ne E a E 4 4 4f H EEE EEE EEE ge EE lt De a nn ne pee Le aan o I I I I I D 15 20 Longitudinal Position m Sample Section Area Plot 2006 www naval architecture co uk 29 ArchimedesMB User Manual 2 4 3 4 2 4 3 5 2 5 2 5 1 Viewing and Editing your Plots The plotting of data in Archimedes MB has a consistent interface regardless of the data you are viewing Displayed on all the graphs available in ArchimedesMB are a legend allowing you
8. to identify the various curves You can also toggle the visibility of these curves by checking and unchecking the checkbox next to the title of the plot you wish to hide view Note that the respective axis associated with the curve you are changing also updates This allows you to generate uncluttered smaller plots for illustration in manuals and reports as well as the flexibility of producing full sized complete plots all from the same interface especially when viewing the plotted data for all hydrostatic properties Working with Tables in ArchimedesMB Tables in ArchimedesMB are a convenient way of displaying data and allowing direct export to spreadsheets for further post processing Copying data to the clipboard from a table will also allow you to directly paste this data in both a word processor and a spreadsheet TODO Notes on csv files text files and printing from tables within Archimedes Status Bar Enter topic text here Status Bar Overview Enter topic text here 2006 www naval architecture co uk 31 ArchimedesMB User Manual 3 3 1 Background Theory This section covers the theory of Naval Architecture and its application in the core functions of ArchimedesMB This is to allow full transparancy to the inner workings of the code and allow the user full clarity on how the values the software spits out are obtained Please if after reading this section anything remains unclear please contact th
9. vertical grey bars allows the resizing of the views The program maintains user preferences and the view sizes as set up on closing down are reloaded when the application is re started 2D Views The 2D views show the three classic views on your model namely Section View Side Elevation and Plan View These views are dynamic and allow you to freely scroll around the model zoom in and zoom out and select move add offsets Basic Navigation Each of the 2D views support four standard mouse operations namely Left Click zoom into view Right Click zoom out of view Left Click and Drag expand defined portion of the view to expand the entire view and Right Click and Drag pan the view in the direction and by the amount specified between the mouse down and mouse up points Section View Advanced Editing The section view has also implemented some advanced features which enable additional functionality namely Ctrl Left Click add point after current offset Ctrl Right Click select nearest offset to point clicked Shift Left Click move currently selected offset to the clikced point and Shift Left Click select nearest offset to point clicked Important For editing the section view using point and click the Hulltree and Data Entry section must be in the offset view 2006 www naval architecture co uk Program Operation 18 In the screenshot below we have zoomed in on the deck edge and offset 7 is active indicat
10. 0 Check All F1 Un Check All Final model is demonstrated in the screenshot below 2006 www naval architecture co uk Program Operation 14 ArchimedesMB Floating Body Hydrostatics File Model view Calculations Help Je LD es Frames OrFsets Model view Calculations 0 00 m fe i i Hull Information CLOOO m E amp ppendages 6 50 000 m K New Appendage 0 anonn itil 4 Appendage Properties 20 000 m Frames 6 20 000 ra H 2 New Appendage 01 10 000 m H W New Appendage 0 0 000 m W New Appendage 0 40 000 m amp U New Appendage 0 20 000 m amp U New Appendage 0 40 000 m tan 50 000 m 20 000 ri 40 000 m 10 000 m 9 000 m 30 000 m 1 0 000 rn 20 000 m 20 000 m 10 000 m 30 000 m an aoe Zi L L 0 000 rm 1 000 m 50 000 m 50 000 m Appendage Mew Appendage 0 Frame Blank Frame mt 23 0941m Y 0 000m 2 76 460m 2 2 4 View Menu Enter topic text here 2 2 4 1 Save View The four sub menus allow the saving of the current view to a bitmap for use in other programs 2 2 4 2 Import Reference Image A feature that has been added to the MB version is the ability to import a reference image to act as a background in the 2D section view Selecting the Import Ref Image from the menu presents the user with the following dialog 2006 www naval architecture co uk 15 ArchimedesMB User Manual I
11. 0 id nAi pe e aia ee _ ms ee aT oe Ep pra C 6 000 m pe a eee ee 5 000 mt SS ne Ca A I g Er 4 000 m BTS 3 000 m la _ SE 2 000 mH 53 BE fi a B i3 EPA ae of Einm ANNAN m 5 000 mi 0 000 m F000 m If you zoom in on the first section section 0 in our view you will notice that the image is offset from the CL Dont worry about this for now Add a new appendage and a new frame and then switch to the numerical offsets view you can scan a copy of the body plan used above from the sample body plan included Model view Calculations 16 000 m 15 500 m 15 000 m 14 500 m 14 000 m 13 500 m 13 000 m 12 500 m 12 000 m 11 500 m 11 000 m LE SL TA RAN m 2000m 3 000 m 4000m 0000m 1 000m You are now ready to digitise a section Start by Shift Left clicking the intersection of section O with the CL on the image This moves the default first offset ready for adding after and following the shape of the section Repeated Ctrl Left Clicking results in the following 2006 www naval architecture co uk Program Operation 20 16 000 m 15 500 m 15 000 m 14 500 m i 14 000 m 13 500 m f 13 000 m 12 500 m yo 12 000 m f 2 11 500 m F 7 11 000 m a f TA BAN m 000 m 0000m 1 000m 2000m 3 000m Adding a new frame and then repeating for all other sections allows the full hull to be imported
12. 62 Center 262 S25 787 1050 1312 1574 7300 2400 seco seco 10200 10300 0 eco 1200 1200 2400 3000 3500 4200 4500 3400 6000 GE0O 7200 7800 zaco S000 3600 10200 10800 11400 Sample Lines Plan generate using FreeSHIP TODO Add skecth showing tumble home sheer camber rake etc etc TODO What is trim moulded dimensions etc 3 2 Modelling and Axis System Archimedes axis system maps the traditional naval architectural vessel axis system of longitudinal transverse and vertical as follows X Axis Transverse Y Axis Longitudinal Z Axis Vertical Also note that the three primary colours are applied to the axis system to allow the user an intuitive indication to what direction or axis any particular user editable values apply For example the numeric 2006 www naval architecture co uk 33 ArchimedesMB User Manual 3 3 edit controls in the Transform tool box lf the fwd direction of your model is set as running along the positive y axis direction then positive X axis points to starboard The following image shows a typical orientation of a vessel modelled in Archimedes Note the Z axis is typically coincident with the vessel centreline fe a a a a EPP a a we em Lie ff F N F fie fff PF NZ a COPIES SPETT p fie eff ee AT Y roe off ff ef ff ff fife df Fe
13. EEE AS AS AS L 0 O5 1 15 2 25 3 0 0 5 1 15 2 2 5 3 0 0 5 1 1 5 2 YCE m EMT amp KML0 m TPI Te cm amp MCT Te m Sample Hydrostatics Plot 2 4 3 2 Cross Curves From this page you can generate a set of cross curves for your model The results can be viewed as either tabular data or as a graph The page is split into two areas with data input at the bottom and results displayed at the top For details of how ArchimedesMB calculates cross curves see Calculation of Cross Curves and GZ Values Data Input 2006 www naval architecture co uk Program Operation 26 The data specifying the range of displacements and angles you wish to run for is entered in the section shown below Start Angle End Angle 4ngle Step Other Angles 0 000 deg 0 000 deg 0 000 deg 0 000 deg Tst Start Displacement End Displacement Displacement Step Tolerance 0 000 Te 0 000 Te 0 000 Te 0 100 Te 2 Run This section allows you to specify both a range of angles of heel to report for via the Start Angle End Angle and Angle Step edits In addition you can also specify key angles to report by adding them into the Other Angles edit and clicking the Add button The Start Displacement End Displacement and Displacement Step edits boxes allow you to define the range of displacements that the set of KN values over the given angle range are calculated Tolerance allows you to specify the accuracy to which the software tri
14. FP data have to be re entered and associated with the new model using the model tree see later External Files On selecting this option a file import dialog box is presented The required model format can be selected by changing the Files of Type combo box as highlighted below Import GHS File Look in O f e m Files of type GHS File ww Files presently supported are as follows GHS Autohydro Files These files can be imported to give a representation of the original vessel Buoyancy elements only are fully supported at present however as Archimedes develops more features of this format will be supported See our online forum for a running commentary on the development of this feature or to provide feedback at GHS Import Forum Topic Defcar Files Defcar files define the floating body as a single hlf body representation Archimedes 2006 www naval architecture co uk Program Operation 8 2 2 2 3 2 2 2 4 2 2 3 imports this and mirrors it to create the full appendage Exporting Models Archimedes provides export to a number of general formats for extended use of models you create These formats are as follows 3D obj This exports the sections as n gons for importing and further use in 3d rendeering and modelling packages Current Frame to CRD File This allows the user to export the currently selected frame to a general purpose txt file called crd These files are useful for tranfering sec
15. create element array dialog and set the following values and click Execute Create Element Array Operate on Select Element Ce Frame Blank Frame w Q Appendage C Create In New Appendage k ve Z omom al 0000m a Mn eh Copy Court dy Execute E Close This creates a leg with 6 frames every 2m between frame Y 0 00m to a frame Y 10 00m Next we want to duplicate complete appendage along the y axis Populate the array tool bax as follows and click execute again 2006 www naval architecture co uk 13 ArchimedesMB User Manual Create Element Array C Frame Appendage New Appendage 0 w Create In New Appendage Operate on Select Element k ii Z 0 000m total Eim pich 0 000m pieh Copy Court a Execute Finally we want to create a copy on the port side Easiest way to do this is to mirror the 3 starboard legs using the Transform dialog Scaling by 1 on the x axis and asking Archimedes to place these scaled appendages in a new appendage will mirror the legs for you Note the use of selecting the appendages you wish to scale all in this case Transform App Hew Appendage 0 perate on Operation Frame e Scale Appendage O Move Hull Rotate Create 4 Copy Select Range E Close C New Appendage 0 New Appendage 0 New Appendage 0 New Appendage 0 C New Appendage 0 C New Appendage
16. d offset count down to 256 each Recent Files and Directories These submenus store the most recent files and directories accessed by the prgram and is persistent from one execution to another It allows users to quickly navigate between recent and common files directories in complicated storage trees and layouts Preferences Application preferences are entered and stored here between program executions This allows the user to customise their work environment to suit their tastes and workflow The user defined preferences are seperated into groups which define the various aspects of the software that can be customised Model Menu Enter topic text here 2006 www naval architecture co uk ArchimedesMB User Manual 2 2 3 1 Transform Dialog The transform tool allows users to modify frames appendages and the whole hull in several ways all from within this one dialog When activated using the tool bar menu or shortcut Cirl T you will be presented with the following Transform Ho Frame Selected Operation Scale Appendage Move Hull Rotate Close From here you can selected the geometry you wish to transform i e frame uses the current frame in the currently selected appendage current appendage or whole hull Operate on Frame Appendage Hull The text indicator at the top will tell the you the name of the frame and appendage the operat
17. directly or indirectly by this document 2006 www naval architecture co uk Program Operation 6 2 Program Operation 2 1 Overview When you start Archimedes you will be faced with a screen similar to the following ArchimedesMB Floating Body Hydrostatics File Model View Calculations Help OSH LS D S Frames Offsets Model View Calculations E Blank Hullform 15 000 m Fa 4 Hall Information A Appendages 0 10 000 m pi 5 000 mi A 0 000 r 5 000 rm 10 000 m 15 000 m 0 000 m 10 000 m 20 000 m 15 000 m Z 15 000 m 10 000 m PauU 5 000 m 5 000 m Y Y 0 0000 m 0 000 m 9 000 m 5 000 m ons 10 000 m 15 000 m 15 000 m 20 000 m OOO m 10 000 m 0000m 10 000 m 20 000 Appendage a 0 000m Y 0 000m 2 0 000m This screen is divided into four main areas namely menu and tool bar at the top Hull tree and data entry on the left model views and reports on the right and staus bar along the bottom For details of each of these refer to the following sections of the help 2 2 Menu and Toolbar 2 2 1 Menu and Toolbar Overview The menu and toolbar are the main areas where you load and save new models import and export models activate floating tool boxes and modify the genreal model charecteristics ltems on the menu can often be quickly accessed via tool bars These can be identified by correponding icons both on the menu item and the tool bar Additionaly
18. e author so we can amend and add further detail as required Primer on Naval Architecture Terms To aid the user in finding their way around the software and also to give a fighting chance of understanding this capter some of the basic terminaology used in Naval Architecture will be discussed Firstly a 3D hullform can be described or shown in 2D form using a lines plan This lines plan shows sections through the hull in 3 different planes known as waterlines sections and buttocks see the three images below to see how these slices through the hull are visualised Waterline plane horizontal slice through a hull normal to Archimedes Z axis Section vertical slice through a hull normal to Archimedes Y axis 2006 www naval architecture co uk Background Theory 32 Buttock Vertical slice through a hull normal to Archimedes X axis These sections can be formally arranged in drawing known as a lines plan A sample lines plan from the excelent FreeSHIP software is shown below 9 600 1200 1800 2400 zecco 3500 4200 4500 5400 ecco 6600 7200 7800 5400 sco 3600 10200 10300 11400 eco 1200 1800 2400 3000 3600 4200 4500 5400 Sco 6ECO 7200 7800 ECO 10200 10600 11400 1574 1312 1050 737 535 262 Cebter 292 535 787 1050 1312 1574 1574 1392 1080 737 535 262 Ceb er 282 575 737 1060 1312 1574 ES si bites 77 fet fet Za 4574 1312 1050 787 S25 262 Center 262 S25 787 1050 1312 1574 1574 1312 1050 787 S25 2
19. e eee 10 deg H 15 deg 20 deg 5 a En L pai en tt o L mers ee Less ms e PPE E ee EEEE E E 25 deg 30 deg ol 40 deg 3 3 30 ag 4 oo 7 o I I I I I I I I I BO deg m ui I I I I I I I I I I I 0 Sc 100 150 200 250 300 350 400 450 s500 550 600 650 Displacement Te Sample KN Curve Plot 2 4 3 3 Longitudinal Buoyancy From this page you can generate area and buoyancy curves for your model As with the other calculations the results can be viewed as either tabular data or as a graph Again the page is split into two areas with data input at the bottom and results displayed at the top Data Input The data specifying the draught you wish to run the analysis for is entered in the section shown below Draught Ba Clicking the run button starts the analysis Note that changing the trim in the std footer of the calculation view will change the trim used in the calculation of the longitudinal section area curve Longitudinal Curve Tables Tabular curve values can be produced and to view these ensure the Table tab is selected at the bottom of the upper area see below 2006 www naval architecture co uk Program Operation 28 At present two curves are supported and these are longitudinal section area and longitudinal buoyancy The longitudinal buoyancy curve is simply the area curve multiplied by the density of the water in which the appendage is
20. e of a section as a series of discreet lines To assess the accuracy offered by this system we can compare different resolutions that describe a circle as follows TODO Add results of section calcs on circle crd files Calculation of Hydrostatic Properties The foundation of most Naval Architectural calculations is the Hydrostatic properties of a vessel or floating body These properties are numerical representations of the underwater form of the vessel They tell the Naval Architect how stiff a body is how buoyant it is at the current draught and if it is statically stable in the upright position We will give a broad overview of hydrostatics and show what the variables actually represent both in the context of a real floating body and also give some detail to the way in which Archimedes calculates them as an aid to those professionals who intend to use the values in their further work We will take each of the properties that Archimedes calculates and discuss their derivation in detail For a complete list refer to section Hydrostatics in the chapter on Reports and Analysis Draught Volume and Displacement Centre of Buoyancy 2006 www naval architecture co uk Background Theory 36 3 9 3 6 VCB LCB TCB Centre of Floatation LCF TCF Moment to Change Trim MCT 1cm Static Stability and the Metacentre KMT KML Waterplane Characteristics TPI WL Width WL Length WPA Calculation of
21. ections are marked as WIP or Work In Progress Please feel free to comment on the content of the manual and provide feedback on what you would like to see added 1 2 Terms and Conditions Software has been distributed free for personal use If used commercially we request that it is registered at a nominal fee of 99 This allows us to pay web server fees commercial components and covers support for all point release versions i e all 2 x versions To register visit Sharelt or follow the links at www naval architecture co uk Nominal upgrade fee applicable for moves from 2 x to 3 x versions etc All rights reserved No parts of this work may be reproduced in any form or by any means graphic electronic or mechanical including photocopying recording taping or information storage and retrieval systems without the written permission of the publisher Products that are referred to in this document may be either trademarks and or registered trademarks of the respective owners The publisher and the author make no claim to these trademarks While every precaution has been taken in the preparation of this document the publisher and the author assume ee bili for errors or omissions or for damages resulting from the use of information contained in this on use of programs and source code that may accompany it In no event shall the publisher and the he an loss of profit or any other commercial damage caused or alleged to have been caused
22. ed by highlight and red arrow If we Shift Right Click on the spot shown below then we can move the offset and the numerical editor is updated accordingly 9 15 9 15 9 15 2 15 9 00 gal pi The view and numerical editor will be updated as follows p 3 544 9 15 4 4 459 9 15 a 5 574 9 15 oO B 6 689 9 15 GIE 844 7 580 5 31 4 500 m 3 000 m 8 000 m 8 000 m 500 m ANA m 3 500 m 3 000 m 6 000 m 8 000 m RAN ra Shift Left Click If we then Ctrl Left Clickbetween offset 7 and 8 above we can add a radius detail between the two 5 44 ee Oe 5 J 5 46 gl pfs 3 500 m 3 000 m 0 500 m a 000 m 300 m 7 AAN re 4 Each Cirl Left Click adds a point after the current point and then automatically selects the next offset allowing an easy way to rapidly trace outlines When used in conjunction with an imported reference image gives you an easy way to import lines plans Digitising Body Plan Start by importing a lines plan refer to View Import Reference Image for details on how to do this You will have a view similar to the following 2006 www naval architecture co uk ArchimedesMB User Manual 19 000 m fl 15 000 m 17 000 m 16 000 ea 1 dt 1 14 000 mi ee bare i a sf 13 000 m Eo S 4 wen 12 000 m hi a 11 000 m _ ia af FD 10 000 m LI y IL im 3 000 m LS g Sle A O f on ri ik Ta As 8 00
23. er Manual LCB m along Y axis from Y 0 00m TCB m along X axis from X 0 00m LCF m along Y axis from Y 0 00m TCF m along X axis from X 0 00m MCT 1cm moment in tonne m TPI metric tonnes KMT m along axis from Z 0 00m KML m along axis from Z 0 00m WL Width max width of water plane along X axis in m WL Length max length of water plane along Y axis in m WPA m2 For more detail on each of these variables and comments on how Archimedes calculates them please refer to the section Calculating Hydrostatic Properties For more information on working with std tables in Archimedes see Working with Tables in ArchimedesMB Hydrostatic Plots As well as tabular data hydrostatics can be represented as graphical plots These plots have multiple axis allowing for different scales and positions for each set of data This allows trends to be identified and distinguished from each other A sample plot is shown below and for more details on the std interface for editing and viewing your plots see section on Viewing and Editing your Plots Hydrostatic Properties for 30m Trawler Hull Longitudinal Position from y 0 00 m LCE amp LCF T T5 5 5 5 95 10 105 11 145 12 125 13 135 14 145 15 155 Lissiecement i erie aa wae ee un ae Volume LCB LCF E a VCB a TFI T MCT dom g EML E i KNIT S11 100 200 300 400 500 600 FOO 800 Displacement Te 0 100 200 300 400 500 600 700 B00 Volume m 3 C a a a L L D D RL EE A
24. erms ccccssccesseceneeceseeenseeensenensecenseenseeoasesenseseaseceaseonsesensess 31 2 Modelling and AXIS SYSTEM sense nnene messes ns 32 3 Offsets and Section DA ce annee cad ces ane nnnm nenn nnnm ete 33 4 Calculation of Hydrostatic Properties ccccccsessseeeeseeesseeeeeeeesseeeeeeeesseeeeeoenseeesseoenseeessonenseees 35 5 Calculation of Cross Curves and GZ Values cccccceeeseeeeeneecenneecenseeeenseeceaseseensesennsesenneesenses 36 6 Internal Data and Scientific Constant Representation ess 36 CROIS S a a nee asecouee 2006 www naxal archifeciure cok Contents Index 2006 www naval architecture co uk Introduction 4 1 Introduction 1 1 Welcome topic Archimedes has been created as a easy low cost commercial or free personal hydrostatics editor It can be used to import or create a model of a floating body and then interogate that model to obtain the hydrostatics of that body at various drafts and trimmed waterlines The results can be saved either as detailed graphs or exported as tabular data for import into a spreadhseet for further post processing The software is provided as is with no warranty so please treat it accordingly By running it on your computer you are implicitly agreeing to the terms and conditions on the next page of this manual Please note that this manual is being updated as the software is being developed and as sucha number of s
25. es to balance the specified displacement and the currently calculated one Default is 100kg however this can be decreased and thought should be given to the size of vessel analysed Investigation is underway and this may be changed in the future to a percentage of the currently analysed displacement Clicking the Run button starts a new thread in the application and the requested cross curves are calculated The results can be diplayed either in tabular form or as a more traditional plot KN Tables Tabular KN values can be produced and to view these ensure the Table tab is selected at the bottom of the upper area see below Table of Cross Curves for 30m Trawler Hull Trim 0 00000 m at Density 1 025 Teme Run Date 26 03 2006 Time of Run 16 21 Displacement Te 0 deg 5 deg 50 000 0 000 0 309 150 000 0 000 0 361 50 000 0 000 0 333 350 000 0 000 0 326 450 000 0 000 0 330 550 000 0 000 0 334 0 000 0 340 Tabular Output following KN Curve Run For more information on working with std tables in Archimedes see Working with Tables in ArchimedesMB KN Plots As well as tabular data KN values can be represented as graphical plots A sample plot is shown below and for more details on the std interface for editing and viewing your plots see section on Viewing and Editing your Plots 2006 www naval architecture co uk 27 ArchimedesMB User Manual Cross Curves of Stability 5 deg D eo ge ee s
26. for greatest flexibility tools and functions can also often be accessed in context sensitive pop up menus for example adding and removing appendages and frames 2006 www naval architecture co uk ArchimedesMB User Manual 2 2 2 2 2 2 1 2 2 2 2 File Menu File Menu allows access to creating and importing models saving your work and changing application preferences New Model Open and Save The most fundemantal operation is the opening and saving of of models Selecting New clears the model data from memory and creates a new blank models with no appendages or other data Clicking Open allows you to open model data from the hll file format This is a txt based xml file where model data is stored in a tree like structure which mirrors the heirarchical structure of the model in memory This file format is easily readble and open to allow users to edit directly in txt editors or write their own exporters Save as its name suggets saves the current models in the native xml file format hil Import and Export Importing models Models from other programs that can be imported along with any limitations are as follows Ver 1 x app Files These files are the native appendage format used by Archimedes ver 1 x single body models and allow users to leverage any legacy models they may have created There are no limitations and the model imported should be directly usable in the new version AP and
27. ge is highlighted using a shaded bounding box For example see below where the model above has been split into fwd and aft appendages and the fwd appendage has been selected in the Hulltree Reports and Analysis All the reporting and analysis tools are grouped within this page view The tabs along the bottom give access to the different analysis types available within Archimedes and the functions of each are described in detail in the following sections Hydrostatics From this page you can analyse your models hydrostatic properties for different draughts and trims The results can be viewed as either tabular data or as a graph The page is split into two areas with data input at the bottom and results displayed at the top Data Input The data specifying the range of draughts you wish to run for is entered in the section shown below Start Draught End Draught Draught Step Take Draughts From nn Here you enter the start draught end draught and the pitch between each set of hydrostatics Start draught must be less than the end draught The start draught is inclusive and the end draught will also be reported if a suitbale value is entered in the step edit box for example start drught of 0 00m and end draught of 1 00m with a step of 0 20m will report hydrostatics at 0 00m 0 20m 0 40m 0 60m 0 80m and 1 00m Using the same values for start and end draughts but a step of 0 30m will results in 2006 www naval architect
28. gous to frames or transverse sections in traditional naval architecture systems and are 2D polygons that are always normal to the local longitudinal Y axis In Archimedes offsets may be entered either clockwise or anti clockwise to create sections and may also use either system within the same model or appendage Unlike version 1 x sections may not have outlines that cross i e figures of eight The following is an example of an illegal section and how it can be modelled legally in ArchimedesMB Illegal Section 25 000 m 20 000 m 15 000 m 10 000 m 5 000 m 0 000 m 5 000 m 10 ANN rr 10 000 m 0 000 m 10 000 m 20 00 2006 www naval architecture co uk 39 ArchimedesMB User Manual Legal Section 25 000 m 20 000 m 15 000 m 10 000 m 5 000 m 0 000 m 5 000 m 10 ANN rr 10 000 m 0 000 m 10 000 m 20 00 The use of crossed sections will have an unpredictable result on your analysis and so you should be very carefull to ensure that these types of sections are not employed in your model Section Accuracy The software calculates the true area of the section as a polygon bisected by a line parallel to the X axis which represents the waterline If the waterline is greater than the maximum offset location on the Z axis then the area will be the complete area of the polygon enclosed by the offsets The calculation of this area assumes the offsets entered describe the profil
29. ion will be carried out on Once the geometry you wish to transform has been identified you then select the operation you wish to carry out on the selected geometry in the right hand radio group box shown below Operation Scale Move Rotate Thereafter the scale move rotate values along each axis are selected in the X Y and Z decimal number boxes below Selecting the coloured button drops down a simple calculator which can be used to work out movement and scale values based on other factors for example multiples of frame spacing etc Create a Copy For each operation a copy is created and scaled moved rotated with the original left as is Execute Scale When execute is clicked the selected geometry is scaled along the x y and z axis by the values in the respective edit boxes Scaling affects frames and appendages differently and can be used to move frames on the y axis stretch frames along the x and z axis Using negative values frames and appendages can be mirrored about their respective axis Scale will not accept zero values and any attempt to do so will have no effect and will be logged in the log file selecting Create a Copy and then scaling an appendage by X 1 Y 1 Z 1 is an effective way to quickly mirror an appendage about the vessels CL 2006 www naval architecture co uk Program Operation 10 2 2 3 2 Move Executing a move translates the geometry along each axis by the p
30. is menu option allows the section view reference image be cleared Hulltree and Data Entry Hulltree and Data Entry Overview Enter topic text here Model View and Reports Model View and Reports Overview The right hand section of the application screen defaults to showing the 4 views of you model namely Section Side Plan and 3D These views allow visual feedback on the shape of your model and also allow direct manipulation of the sections and offsets through point and clicking see 2D Views The tabs at the top of this area allow you to switch from the model views to the report view Here is where you interrogate the model and run hydrostaics cross curves etc Model View The Model View tab gives access to the 4 classic views on you model as shown below 2006 www naval architecture co uk 17 ArchimedesMB User Manual 2 4 2 1 Model view Calculations 16 000 m 15 000 mi 14 000 m 13 000 m room FATAL 7777 WA 3D View Ta a m A A 9 000 m r000 m F N Pol SRE ER 1 000 ra PS ta Mt 0 000 m 1 000 m 1 ANN en k E h ra T re L I TF e i rt a Ca 5 000 m 0 000 m 5 000 m 40 000 m 30 000 rm 20 000 r 10 000 r T 1 0 000 m 20 000 rm 30 000 r 4N NAN ra 40 000 m Plan View Side View 30 000 m 20 000 m 0 000 m 10 000 m 20 000 m 0 ANN rr 50 000 m 50 000 m Clicking and dragging on the horizontal and
31. mport Reference Graphic Import E Update v Dynamic Update By selecting the import button you will be presented with an import picture dialog Selecting an appropriate image and clicking clicking OK brings the selected image into the background of the dialog The four edits around the perimeter are updated to accurately draw the imported body plan at a nominal 20 0m wide and height set to correctly depict the aspect ratio of the image It is suggested that you use the defaults in the boxes on import digitise the sections then clear the reference image and use Transform Dialog to set the correct scale and location x1 x x2 z1 and z2 represent the real world values the edges of the image are mapped to and is how both the scale and the transverse and vertical location of the mapped image is located in the section view The dialog loaded with a sample image downloaded from the web here Sample Image is shown below 2006 www naval architecture co uk Program Operation 16 2 3 2 3 1 2 4 2 4 1 2 4 2 i Import Reference Graphic Sel 19 59 m z2 Dere inclined Leu iraka rri 17 AE Len yi en m Se A Import 2 Update e Close Dynamic Update Clicking Update closes the dialog and maps the reference image into the section view ready for digitising The L4 Dynamic Update checkbox updates the imported image as you alter the values in the x1 x2 ans z1 z2 boxes Clear Import Image Th
32. of the analysis Trim Progress Completed hydrostatic analysis run 0 00000 _ Clicking the Run button starts a new thread in the application which takes the model in its current state allowing for any appendages that are currently turned off or on in the model inspector tree and returns both tabular and graphical reports on these values You can ask Archimedes to insert the latest set of tabular values at the top of the current table by checking the appropriate item Append Report under the Calculations menu Note that this only maintains a record of tabular data as it is run it does not store consecutive records of graphs These have to be saved each time a new run is initiated Hydrostatic Tables Tabular hydrostatics can be produced and to view these ensure the Table tab is selected at the bottom of the upper area see below Table of Hydrostatic Properties for 30m Trawler Hull Trim 0 00000 m at Density 1 025 Te m Run Date 07 03 2006 Time of Run 20 47 Draught Volume Displacement VCB m m3 Te m m 0 000 1 210 1 240 0 092 6 903 0 100 2 599 2 664 0 013 B HD 0 200 4 876 4 998 0 065 9 663 8 287 8 494 0 142 10 909 13 051 13 377 0 219 12 056 Archimedes allows the calculation and reporting of key hydrostatic properties namely Volume m3 Displacement metric tonnes VCB m along Z axis from Z 0 00m 2006 www naval architecture co uk 25 ArchimedesMB Us
33. rescribed amount Rotate Executing a rotate for sectional geometry is only valid about the y axis and is analagous to helling a vessel with no change in trim Note that rotations are about the yaxis i e origin of global coordinates Select a Range _ Select Range Checking this box expands the dialog box and allows the user to select a range of either frames or appendages to transform using the tools and options outlined above The expanded dialog appears as follows example sown has a single body hull loaded Transform App Main Hull Fr 1 4074 Uperate on Operation Frame Scale Appendage O Move Hull Rotate Create amp Copy dy Execute E Close O 1 4074 CI 3 6448 C 5 8821 O 81194 C 10 3567 Q 12 594 Q 14 8314 Check All Un Check All x Delete From here multiple frames or appendages if model permits can be selected If required a selection of frames appendages can be quickly deleted This is a speedy alternative to deleting one by one using the model tree Check all and uncheck all quickly allows the selection of all or none of the frames in the list Create Element Array The Create Element Array tool allows users to take a single instance of geometry such as a single frame or appendage and make multiple copies evenly spaced along any of the three axis When activated using the tool bar menu or shortcut Ctrl A you will be presented with the following 2006 w
34. spacings Alternatively clicking the button marked pitch toggles it to Total i e HN m or di total With Total selected the pitch between each copy is calculated by dividing the figure entered by Copy Count This is usefull if the user knows the last location of a copy and can select a number of copies to populate between a start and end point Example Lets say you wish to create a series of columns to represent the legs os a semi submersible The base geometry is a rectangle 10m wide and 30m high The top of the pontoon is 10m above the baseline z 0 00m and the transverse and longitudinal pitch is 30m and 30m with 3 columns posiitoned along the length of the pontoon Creating the base rectangle with snaps switched on and set to 1m is simply a case of four clicks on the section view giving 2006 www naval architecture co uk Program Operation 12 ArchimedesMB Floating Body Hydrostatics File Model View Calculations Help OAN suUDWEe F Offsets Model View Calculations 40 000 m 10 000 10 000 35 000 m 40 000 40 000 30 000 m 25 000 m 20 000 m 15 000 m 10 000 m 20 000m 30 000m 40 000m Fi 250 000 m 200 000 m 150 000 m 100 000 m 50 000 m 0 000 m 50 000 m 100 000 m 150 000 m 200 000 m 250 000 m AM ON 00 000 r 0 000 m 1000 000 r Appendage New Appendage 0 Frame Blank Frame s 46 864m Y 0 000m Z 40 233m If we now open the
35. tin cc 7 New Model Open and Save een lt atees de ee mnnesicnosnme nice Nanaimo 7 BOT AAC a 0 edscuate muceend cease tecuaaesteuens 7 Recent Files and Dir CtOries ccccseccceeccseeeceececeececeeeeseeseueeseueeseueesaeesseeseueesaueeseessueessueeseeesueesaueessueeseeeeaaes 8 ial 21 1d SAS a 0 ee 8 Model MER eeccdeuccsetucvsessedesderenseeesiaees 8 SO DO a rere ere ence 9 Create Element a2 een eee nn en ee rene Tanne ne ene nn ee renee ee omen Te 10 VIGEW MODU irssi Lantcaseennnetriestiwutsnantaewanboneis 14 NE em a EO GE Oe tne tee ne ee 14 IMC PRG TOE UGC OUR dd ee a co done 14 3 Mulitre and Data ENUY need a sanene es nncepedenn unes 16 Hulltree and Data Entry Overview sisi tn iii ssetrts se ssgnstanessmnsennnscestiensoneensnsiueeqn sensponees sn tn 16 4 Model View and Repofrts 1 ssss cnnncssnnnne annee manne rate nnmnnn mnnn 16 Model View and Reports OverviBW sississsianinnnassninitannninnnnn anaana anaana ana anana ariana aiaa iinan nani 16 Mod l VIEW asrasa Aai R A AER 16 NE A adneaaaeasenaastadaeeaean 17 oample Body PR aai RA ARENE ENE T 20 Ne 21 Repons and ANGIVSIS nn nada nana annee ne nanas t ee ne ntm E 23 OO SES E E an a cn cn ca 23 CCR 25 CART Buoy ARR ee nana se em 27 Viewing and Editing your RIOISS a a a ee 29 Working with Tables in ArchimedeSMB sise 29 S VAS BA a See cn 29 Status Bar OV nd ue 29 Part Ill Background Theory 31 1 Primer on Naval Architecture T
36. tion data to other prgrams or spreadhseets and are described as follows The first figure is the number of offsets in the file and thereafter it is simply the offsets as X Z pairs e g the following represnts a square with edge length 10 00m and centered at the origin Code 4 5 5 5 5 5 5 5 Current Appendage to app file Users can select an appendage and export to ver 1 x file This is intended to allow users to use legacy code and routines they may have created to work with older files New work should always be saved in the extensible hll format Current Appendage to FreeShip txt file This feature allows the exporting of an appendage to a txt file that FreeShip see FreeShip website for an excellent 3d hull modeller can open This allows users to use the section tracing system to transfer model data to FreeShip for creating a true 3d representation of the vessel For example starting with a legacy low resolution ghs file it can be exported to freeship tidied up and accurately modelled then brought back into Archiimedes for hydrostatics and stability checks GHS File Using this option users can export a hll file to GHS file format Due to the way that the ghs file format works limits section count offset count appendage names etc this is not complete If you model is to be exported for use in ghs we recommend you model all parts seperately on the CL name appendages in line with ghs recommendations and keep the section an
37. ure co uk Program Operation 24 draughts reported for 0 00m 0 30m 0 60m 0 90m Draught Step must have a valid figure i e non zero positive decimal figure If an incorrect value is entered Archimedes will throw an eror and not run To run a hydrostatics for a single draught for example 5 00m setting a start draught of 5 00m end draught of 5 20m and a step of 0 50m will only report one set of hydrostatics Note that to correctly plot a graph a range of values are required and so calculating for one draught only will not provide a useable plot on the graph page The drop down box entitled Take Draughts From allow you to specify where the start and end draughts are referenced to Internally all draughts are based on the values running along the Z axis at Y 0 00m and the software defaults to this However you can enter the longitudinal location of draught marks and ask Archimedes to use these as the basis for reporting draughts For example if you wished to calculate hydrostatics for draughts against readings referencing midships draught marks on your vessel you can change the drop down box to reference the mid set of draught marks The position of these marks on the Y axis are edited using the model inspector tree Standard Calculation Controls Below these edit boxes there are standard controls which allow you to specfiy the trim of the vessel for the current run and also a progress bar which reports on the current status
38. ww naval architecture co uk 11 ArchimedesMB User Manual Create Element Array Uperate on Select El ment Frame 1 4074 Appendage C Create In New Appendage x Y z D000m pitch 0 000 m 0 000 m Copy Court dy Execute E Close Firstly after activation you should select the geometry you wish to copy by slecting either ENS or RRREStE The Select Element drop down list will change its content subject to what is selected Once the original geometry element has been selected the spacing and number of copies along each axis can be specified in the Copy Count box If you are creating an array of frames you are presented with the option ot create the multiple copies and insert them in the appendage of the original Alternatively you can check Create In New Appendage and the program will create a new blank appendage and feed all copies of the base frame to this new appendages So if you wished to take a reference frame and create a parallel midbody as a new appendage from this reference frame which may reside for example in a swim end then checking this option would do just that Distribution of Copies There are two ways of specifiying the distribution of copies of the reference geometry You can either specifiy the offset between each copy as the pitch between each one and then duplicate these by the number entered in Copy Count Useful for creating Known number of frames at regular
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