HydroMesh User Manual
Contents
1. DET NORSKE VERITAS SOFTWARE HydroMesh User Manual Program version 2 0 12 1 June 2010 Split line shows in red when creating and will not take effort before Enter or whitespace key is pressed e Draw orthogonal horizontal or vertical split lines by pressing shift key when moving the mouse to draw the lines as follows e The program will automatically snap to the intersecting points when you move the mouse near those points as follows The red circle will be displayed when point are snapped le Select Split Line Mode You can go to the Select Split Line Mode by press the tz button in the toolbar e Move split line nodes see 3 4 3 Split line properties editor e Select split line using mouse e Delete selected split line s by either pressing delete or e key or press X button in the toolbar e Multi select split lines by pressing shift key then subsequently use mouse to select lines I Create Patch Mode You could go to the Create Patch Mode by clicking the button in the toolbar DET NORSKE VERITAS SOFTWARE HydroMesh User Manual Program version 2 0 13 1 June 2010 Then you could use mouse to select to closed regions to create patch You could select a closed region otherwise no patch will be created and a dialog will be popped up to inform you Cannot create patch for this candidate region please select a dosed region instead ES Select Patch Mode e Moves patch co2. SESAM USER MANUAL HYDROMESH N RARA RARA AU ARANA We LR LIF POLL Z AN Sy th ila gt i LOLLIPOS PUTA ETR L AD A San AO TOS A ALLARIZ GT an atra DI 7 LILLIE TAT I ae LLL ILLITE _ HE 0 TTT AVI VOR Wa ILLIA Le Mag iy My ZAS VEE WD CLL UL NA I ILI LILIN Le LLL ILI FLL User controlled free surface meshing for HydroD DET NORSKE VERITAS SESAM User Manual HydroMesh User controlled free surface meshing 1 June 2010 Valid for HydroMesh version 2 0 Developed and Marketed by DET NORSKE VERITAS Copyright O 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 Software Veritasveien N 1322 H VIK Norway Telephone 47 67 57 99 00 Facsimile 47 67 57 72 72 E mail sales software sesamdnv com E mail support software supportOdnv 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 tha
3. The idea about HydroMesh is to generate a free surface mesh for a section model where the mesh parameters are controlled by the user After reading in the waterline from an SSG file automatically generated by wasim_mesh or HydroMesh the free surface will be cut into user defined mesh patches SSG GEO FEM XML files will be used to store the final mesh data 2 2 Command line arguments HydroMesh execution HydroMesh exe filename _fs xml This should generate the free surface and hull mesh files SSG GEO FEM DET NORSKE VERITAS SOFTWARE HydroMesh User Manual Program version 2 0 4 1 June 2010 3 HYDROMESHSETUP APPLICATION 3 1 Introduction HydroMeshSetup is used to read in waterline coordinates divide the free surface into user defined patches and finally store the result in an XML file This XML file could be read into HydroMeshSetup again for further editing 3 2 Command line arguments HydroMeshSetup execution HydroMeshSetup exe filename _dry ssg filename _fs xml If the surface settings file exists the settings will be imported otherwise the file will be created 3 3 Application Window Li HydroMeshSetup 2 0 SemiSetup_dry ssg File Help Menu Items SERRA A ToolBar Buttons Surface boundary shape Co n t rol Pa n e Circular Rectangular O pe Fa t in g Area Total surface size vessel lengths Radius 5 Properties Editing Area Shift LeftMouseButton Draw horizontal ver
4. SOFTWARE HydroMesh User Manual Program version 2 0 14 1 June 2010 all 3 4 5 When a patch is selected you could move the cursor near one of its patch edge to select the edge then the Stretch Condition tab page will be displayed the subsequent operation 1s the same as specified in 3 4 3 Stretch Condition Copy amp Paste patch properties If you want to share patch property settings across different patches you could select a source patch first then press CTRL C to copy those patch properties into clipboard then select another patch press CTRL V to paste the patch properties to the destination patch then the two patches will share the same patch property settings Show Mirrored Mesh only when section model is symmetric see 3 4 1 Button bar a The mirrored patches are displayed in white colour Status Bar Area Shift LeftMouseButton Draw horizontal vertical lines Whitespace Enter End line drawing X 152 83 Y 200 01 The left hand side of the status bar shows the helper message telling you the different operations you could perform in each mode Draw Split Lines mode Create Patch mode etc The right hand side of the status bar displays the coordinates of cursor position DET NORSKE VERITAS SOFTWARE HydroMesh Program version 2 0 15 3 5 Integration with HydroD e Alternative 1 2 Name SectionMesh2 Hull mesh setting Water surface mesh setting Use
5. both sides of channel at the girth wise and longitudinal direction you could only examine the mesh resolution visually from Hydrob hannel Mesh Resolution a a Mumber of longitudinal elements 30 Number of girthwise elements 1 Mesh Resolution Setting from HydroMesh Sin Ss SSS ivr SS SSS SSE SS SSAA SSS SSS O SOS Sas NS A i RSS SN SSR SA SANS SOARS a a SSR SR NTA ENR NNN SRA ARREARS ON AUER ANS SSA OS o AO SOS Ss SORES Wh 1 sa NS SS BOSS Sy a A OS 2 3D Mesh Visualization in HydroD DET NORSKE VERITAS SOFTWARE HydroMesh 8 User Manual Program version 2 0 1 June 2010 3 4 3 Properties Editing Area The properties editing area contains two editors Split line properties editor and Patch properties editor Split line properties editor Select a split line high lighted in yellow the editor will shows in the properties editing area Split line properties Point Coordinate A 189 2882 Y 206 7594 The coordinates of any point could be changed manually simply by clicking the point on the list then enter the new coordinates in the textboxes Split line properties lt Click the point Point Point Coordinate Change the coordinates gt 206 7594 The point s location can be changed by dragging it as well Select the point and drag DET NORSKE VERITAS SOFTWARE HydroMesh Program version 2 0 9 Patch Prope
6. O aaa 15 b AOUE LAA AAN AAN AAA lada 15 a AMENA aaa a laa poe 15 Se ATACAN ON adobe 15 LOT HvdroMestiS eta InputlO PULSE ca 15 OZ TAVOTOMESTE INU OULD VU CS E AE A DEA A E a 15 DET NORSKE VERITAS SOFTWARE HydroMesh User Manual Program version 2 0 2 1 June 2010 INTRODUCTION 1 1 Overview HydroMesh is an alternative application to wasim_mesh the mesh generating program for Wasim The HydroMesh application computes both the model and free surface mesh A graphical user interface called HydroMeshSetup is used to define generate free surface mesh 1 2 HydroMesh in the Sesam System HydroMesh is integrated into the HydroD SESAM system it can also be run as a stand along program using input files created by Wasim or an XML file free surface settings file generated by HydroMeshSetup 13 Terminology and Notation LMB Left mouse button RMB Right mouse button PLN File format for sectional hull geometry SSG File format for meshes GEO File format for irregular meshes FEM General SIF file format irregular meshes XML File format for free surface mesh settings waterline split line coordinates mesh resolution etc HydroMeshSetup User interface for HydroMesh for generating and editing free surface mesh configuration file DET NORSKE VERITAS SOFTWARE HydroMesh User Manual Program version 2 0 3 1 June 2010 2 HYDROMESH APPLICATION This chapter provides an overview of the HydroMesh application 2 1 Introduction
7. indow button click to zoom the free surface to fit the window Shortcut F A Mirror the model button available only when the model is not symmetric Shortcut M Clear mesh button remove all user defined patches and split lines Shortcut L 3 4 2 Control panel Surface Boundary Shape Circular Rectangular surface Size vessel lengths Surface Boundary Shape Width 8 Circular Rectangular Height Surface Size vessel lengths Depth Radius Channel Mesh Resolution Number of longitudinal elements Number of githwise elements e Surface boundary shape Select the shape of the free surface boundary condition shape you could choose either circular or rectangular boundary shape e Aspect Ratio Check You could check the aspect ratio of the free surface patch as follows Minimum Aspect Ratio When you press the Check button any invalid patch whose aspect ratio is less than the value specified in the above TextBox will be highlighted in red color e Total surface size vessel lengths The surface size value decides the size of the free surface by default the radius is 5 vessel lengths the width is 10 and the height is 5 the depth is 5 Total surface size vessel lengths Radius 5 Surface Size vessel lengths a O S E _ User Manual HydroMesh DET NORSKE VERITAS SOFTWARE 1 June 2010 Program version 2 0 Channel Mesh Resolution This could change the mesh resolution for the
8. lar mesh file Free surface mesh file filename _fs ssg and filename _fs geo irregular mesh file Combined mesh file free surface amp wet hull filename ssg and filename geo irregular mesh file Files using SIF file format T7301 FEM Dry hull T7302 FEM Wet hull T7303 FEM Free surface T7310 FEM T7301 T7302 T7303 mirror images in the case of symmetry T7320 FEM TT7301 T7302 T7373 FEM Mesh of free surface in global coordinates system T7374 FEM Symmetric free surface mesh it will be generated only when the model is symmetric
9. r controlled surface meshing 9 Settings C Automatic surface meshing 9 a A Aspect ratio forthe radial grid Q20 Total mesh radius vessel lengths 9 2 3 Sn Minimum number of panels across wake sheet 9 ja q y 9 Minimum number of panels between hulls 92 User Manual 1 June 2010 The Settings button starts the HydroMeshSetup application and generate filename _fs xml file after quit then HydroMesh will read the XML file and generates data files see section 3 6 e Alternative 2 An existing SectionMesh can also be edited by selecting the Edit surface mesh settings item on the right click menu This will start the HydroMeshSetup program and regenerate the mesh when the program finishes 3 6 Data organization 3 6 1 3 6 2 HydroMeshSetup input output files Input filename _dry ssg dry hull mesh file filename _fs xml user defined free surface mesh setting file Output filename _fs xml user defined free surface mesh setting file HydroMesh input output files Input filename pln section model hull geometry file filename _fs xml user defined free surface mesh setting file DET NORSKE VERITAS SOFTWARE HydroMesh User Manual Program version 2 0 16 1 June 2010 Output Dry hull mesh file filename _dry ssg and filename _dry geo irregular mesh file Wet hull mesh file filename _wet ssg and filename _wet geo irregu
10. rner points Y ou could drag one of the patch corner points to the desired intersecting points for the patch when you drag the corner near a specified point a red circle will be displayed as following left hand side picture shows when you could release the mouse the program will automatically update the patch as the following right hand side picture shows Sometimes the mesh doesn t like nice as follows One simply way to fix this issue is going to the patch property editor select Mesh Resolution tab page see 3 4 3 Patch Resolution for further reference Then you could try change the order of the corner points by continuously click the RotatePatch button until the The edge marked as 0 is near the centre of the free surface Another way to fix this issue is go to the Poisson tab page see 3 4 3 Poisson for further reference to control the circumferential and radial control parameters e Delete selected patch by either pressing delete or e key or press X button in the toolbar e Create patch You could create patch in Select Patch Mode by pressing shift key then use the mouse to pick up a closed region to create patch after the patch is created it will be in selected mode Then you could do further operations on 1t such as redefining corner points stretch condition and Poisson control parameters e Select patch edge for stretch condition definition DET NORSKE VERITAS
11. rties Editor Patch Resolution User Manual 1 June 2010 When a patch is selected in the operating area the patch properties editor will shows up Patch Resolution Stretch Condition Poisson Mesh Resolution Comer Points Point O 1493 02 113 16 i 26 85 113 16 Point 2 116 40 412 70 Point 3 212 68 395 23 Mesh resolution can be changed by input new values in the textbox as shown in the picture above The corner points group box shows corner points coordinates not editable It s highly recommended that the corner order of the currently edited patch in the operating area matches exactly as the corner order displayed in the Patch Resolution tab as follows DET NORSKE VERITAS SOFTWARE HydroMesh User Manual Program version 2 0 10 1 June 2010 As above pictures shows the edge marked from 0 1 for each four patches in four different quadrants are near the centre of the free surface physical domain In order to achieve this you could click the RotatePatch button it will rotate the corner 90 around the counter clockwise direction for each click as follows 0 90 180 270 The edges tab page shows how many points are from waterline on each edge Stretch Condition Stretch Condition tab page could define the point distribution stretching for a specified edge The stretch function HydroMesh use
12. s is amO s Pn 1 PM n 1 P mO The following is the definition for each column Edge List the four edges which you could define stretch condition for P This parameter controls the slope of the distribution usually you could choose a value between 2 5 inclusive DET NORSKE VERITAS SOFTWARE HydroMesh User Manual Program version 2 0 11 1 June 2010 Q This parameter controls the departure from linearity by default HydroMesh use linear spline interpolation to equally divide the patch edge based on the mesh resolution you set from the Mesh Resolution tab page Reverse Orientation This could which direction orientation the point distribution should follow When you select edge from the Stretch Condition tab page the corresponding edge will be highlighted in the operating area Stretching condition on each edge Reverse Orientation Poisson AA Patch Resolution stretch Condition Poisson Radial Control Parameters as fo ean lt a lt 6009 J Circumferential Control Parameters Jap eaa In Poisson tab page you could control the interior mesh orientation both at radial and circumferential direction HydroMesh uses the following Poisson control function for both radial and circumferential mesh control P 0 ae 3 4 4 Operating Area Draw Lines mode You can go to the Draw Line Mode by press the button in the toolbar e Draw split line see 3 4 1 Button bar
13. t 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 DET NORSKE VERITAS SOFTWARE HydroMesh User Manual Program version 2 0 l 1 June 2010 HydroMesh User Manual Table of Contents INTRODUCTION a das 2 Las OVERVIEW AA A a a AA 2 12 HYDROMIESA INTHE SESAM OY STE MUA A A EAS EEE AA AA SS 2 ES LERMINOLOGY AND NOTA TON into TA LAIR RA AA A ES ic 2 Ze HYDROMESH APPLICA TTON dsaccecesediGsecscdesedececnds Gaccadecadsscncesacsuavcsdevedescacteacsedececsedaseetecsdesedeesessesdeecaccasseudeeee 3 Did INTRODUCTION ES A E A a 3 2 2 COMMAND LINE ARGUMENTS A A add 3 Se HYDROMESHSETUP APPLICATION sr a icoes 4 P MENT RO DU CMON E A E A tate aace sates uantadsea 4 Sez COMMAND TINE ARGUMENTS aaa A A AAA AA 4 Deo APPLICATION WINDOW A AA AS AAA AAA AAA A A 4 3A USERINTEREACE urraca ada its 5 S44 Menu liens amp Tool Bar BUNS 00 ir 5 a Mente Sr io 3 TEDA DU S EA T AE N E E E N TE EE O E A 5 A OTOL ee amp SUCEDO dary SADO a A NA A AA A e ARS e TOUS ACEN ZE VESSEL O IS aaa 6 o Channel Mesh Resoluci n 7 IAS POP n eS FINO ATCO eee e AA E E TA 8 MBO TNC POEL es COON eri e a POE EVOPCHUes EaU onana a E in cotad ts chi a bencareled tae tics naeia restau 9 SAS OPG ATCA AA O A Il ES OUEN 14 33 INTEGRATION WOH R
14. tical lines Whitespace Enter End line drawing Status Bars X 49 19 Y 436 11 DET NORSKE VERITAS SOFTWARE HydroMesh User Manual Program version 2 0 5 1 June 2010 3 4 User interface 3 4 1 Menu Items amp Tool Bar Buttons e Menu Items 1 Open menu item When choose Open a file open dialog will appear in which the file type is fixed Open mesh setting file 8 Semisetup_dry ssg My Recent Documents Ls Desktop My Documents gs My Computer OSLLP8483 File name My Network Files of type Excel Hull uisa files pS Free surface setting file ml 2 Save menu item Save the free surface setting into xml configuration file the file name is ended with _fs xml 3 Exit menu item Exit the HydroMeshSetup exe e Tool Bar Buttons cA RIX A gt Open file button Shortcut Ctrl O ll Save file button available only when changing has been made Shortcut Ctrl S Ts Select split line mode click to select split line to edit its properties Shortcut S MN Select patch mode click to select a patch to edit its properties Shortcut P DET NORSKE VERITAS SOFTWARE HydroMesh User Manual Program version 2 0 6 1 June 2010 Draw lines mode button click in operating area to draw a split line Shortcut D NM Create patch mode button click in closed region to create a mesh patch Shortcut C X Delete mode button Delete selected patch or split line Shortcut E Scale content to w
Download Pdf Manuals
Related Search