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文档简介
GiD
Theuniversal,adaptativeanduser
friendlypreandpostprocessing
systemforcomputeranalysis
inscienceandengineering
UserManual
TableofContents
ChaptersPag.
1INTRODUCTION1
1.1Modelsusedinthismanual1
2INITIATIONTOGiD3
2.1Userinterface3
2.1.1Changetheme3
2.1.2Wamline3
2.1.3Commandline4
2.1.4Statusbar4
2.1.5Contextualmenu4
2.1.6Escapefunction4
2.2Loadamodel4
2.3Rendermodes5
2.4Changeviewsofthemodel6
2.4.1Zoom6
2.4.2Pan6
2.4.3Rotate6
Setcenterofrotation6
2.5Layersandgroups6
2.5.1Createalayer7
2.5.2Renamealayer7
2.5.3Changethecolorofalayer8
2.5.4Sendentitiestoalayer8
2.5.5SwitchOnzOff10
2.5.6Freezealayer10
2.5.7Transparency10
2.6Entitiesinformation11
2.6.1Labels11
2.6.2Listentities12
2.6.3Signal13
2.7GeometryandMeshmodes14
2.8PreandPost15
2.9Selectanddisplaystyle15
3INITIATIONTOPREPROCESSING17
3.1Firststeps17
3.2Creationandmeshingofaline17
3.3Creationandmeshingofasurface20
3.4Creationandmeshingofavolume28
4IMPLEMENTINGAMECHANICALPART33
4.1Workingbylayers33
4.2Creatingaprofile34
4.2.1Creatingasize-55auxiliaryline34
4.2.2Dividingtheauxiliarylinenearcoordinates(40,0)35
4.2.3Creatinga3.8-radiuscirclearoundpoint(40,0)35
4.2.4Rotatingthecircle-3degreesaroundapoint35
4.2.5Rotatingthecircle36degreesaroundapointandcopyingit36
4.2.6Rotatingandcopyingtheauxiliarylines37
4.2.7Intersectinglines40
4.2.8Creatinganarctangentialtotwolines41
4.2.9Translatingthedefinitivelinestothe'profile'layer42
4.2.10Deletingthe'aux'layer43
4.2.11Rotatingandobtainingthefinalprofile43
4.2.12Creatingasurface44
4.3Creatingaholeinthemechanicalpart45
TableofContentsiii
4.3.1Creatingaholeinthesurfaceofthemechanicalpart45
4.4Creatingvolumesfromsurfaces46
4.4.1Creatingthe'prism'layerandtranslatingtheoctagontothislayer46
4.4.2Creatingthevolumeoftheprism47
4.4.3Creatingthevolumeofthewheel48
4.5Generatingthemesh49
4.5.1Generatingacoarsemesh49
4.5.2Generatingthemeshwithassignmentofsizearoundpoints51
4.5.3Generatingthemeshwithassignmentofsizearoundlines52
5IMPLEMENTINGACOOLINGPIPE55
5.1Workingbylayers55
5.2Creatingacomponentpart55
5.2.1Creatingtheprofile56
5.2.2Creatingthesurfacesbyrevolution56
5.2.3Creatingtheunionofthemainpipes56
5.2.4Copyingthemainpipe57
5.2.5Creatingtheendofthepipe58
5.3CreatingtheTjunction60
5.3.1Creatingoneofthepipesections60
5.3.2Creatingtheotherpipesection60
5.3.3Creatingthelinesofintersection61
5.3.4Deletingsurfacesandcloseavolume61
5.4ImportingtheTjunctiontothemainfile62
5.4.1ImportingaGiDfile62
5.4.2Creatingthefinalvolume63
5.5Generatingamesh64
6ASSIGNINGMESHSIZES65
6.1Introduction65
6.1.1Readingtheinitialproject65
6.2Element-sizeassignmentmethods66
6.2.1Assigngeneralmeshsizewithdefaultoptions66
6.2.2Assignsizetopoints68
6.2.3Assignsizetolines69
6.2.4Assignsizetosurfaces70
6.2.5Assignmentfollowingchordalerrorcriterion71
6.2.6Assignstructuredsize72
6.3Skipentities73
6.3.1Skipentitiesautomatically73
6.3.2Forcetomeshsomeentity75
7METHODSFORMESHGENERATION79
7.1Introduction79
7.1.1Readingtheinitialproject79
7.2Typesofbody-fittedmesh80
7.2.1Generatingthemeshbydefault80
7.2.2Generatingthemeshusingcirclesandspheres81
7.2.3Generatingthemeshusingpoints82
7.2.4Generatingthemeshusingquadrilaterals83
7.2.5Generatingastructuredmesh(surfaces)84
7.2.6Generatingstructuredmeshes(volumes)86
7.2.7Generatingsemi-structuredmeshes(volumes)88
7.2.8Concentratingelementsandassigningsizes90
7.2.9Generatingthemeshusingquadraticelements92
7.2.10Generatingminimumelementsmeshes(surfaces)94
7.2.11Assigningdifferentunstructuredmeshers(surfaces)95
7.3Embeddedmesh96
7.3.1Readingthemodel96
7.3.2Generatingtheembeddedmesh97
TableofContentsiv
7.3.3Assigningmeshsizes99
7.4Cartesianmesh99
7.4.1Generatingthecartesianmesh101
7.4.2Zmeshercartesianmesher105
8POSTPROCESSING107
8.1Loadingthemodel107
8.2Changingmeshstyles108
8.3Viewingtheresults108
8.3.1Isosurfaces109
8.3.2Animate110
8.3.3Noresults113
8.3.4Resultsurface113
8.3.5Contourfill,cutsandlimits114
8.3.6Combinedresults117
8.3.7Stereomode(3D)119
8.3.8Showminmax120
8.3.9Streamlines121
8.3.10Graphs124
8.4Creatingimages129
9CADCLEANINGOPERATIONS131
9.1ImportingonGiD131
9.1.1ImportinganIGESfile132
9.2Correctingerrorsintheimportedgeometry133
9.2.1Meshingbydefault134
9.2.2Correctingsurfaces135
9.3Theconformalmeshandthenon-conformalmesh138
9.3.1Globalcollapseofthemodel138
9.3.2Correctingsurfacesandcreatingaconformalmesh140
9.3.3Creatinganon-conformalmesh145
10DEFININGAPROBLEMTYPE147
10.1Introduction147
10.1.1InteractionofGiDwiththecalculatingmodule147
10.2Implementation148
10.2.1Cmas2dexample148
10.2.2Interfacedefinition149
10.2.3Writingthecalculationfiles150
10.2.4Solverandrun151
10.2.5Results151
10.3Usingtheproblemtypewithanexample151
10.4Additionalinformation153
10.4.1Themainprogram154
10.4.2Wizardextension158
10.5Appendix158
10.5.1'Classic'problemtypeimplementation158
Implementation159
.1Materialsfile160
.2Generalfile160
.3Conditionsfile161
.4Writingthecalculationfiles162
.5Solver165
.6Runthesolver165
Usingtheproblemtypewithanexample166
1
1INTRODUCTION
ThismanualcontainsacollectionoftutorialsandpracticalinformationforlearningthebasicsandadvancedfeaturesofGiD,
coveringfullflowofGiDuserfrompreprocessingtopostprocessinggoingthroughmeshing,analysisandintroductionto
customization.
1.1Modelsusedinthismanual
Inordertofollowsomeofthetutorialsincludedinthismanualsomefilesshouldbedownloaded.
ThemodelsarelocatedinGiDofficialwebpageinSupport->Manualssection.
Themodelsarepackedinazipfileandclassifiedbychapters.
INITIATIONTOGiD2
3
2INITIATIONTOGiD
ThephilosophyofthistutorialistogetfamiliarizedwithGiD:howtochangetheviewsofthemodel,howtomanagethe
Layers,andotherbasicfeatures.SomeofthisfeaturesarebothinthepreprocessingandthepostprocessingpartsofGiD,
althoughtheexamplesshownarefromthepreprocessingone.
Manytimesthetextwillmakereferenceto'entities'.Almostalltheoptionsexplainedinthistutorialarevalidbothfor
geometricalandmeshentities,althoughtheexamplesusedareoftengeometricalones.
ThetopicsinthistutorialarefurtherexplainedintheReferenceManual.Wehaveselectedsomeofthebasicfeaturesto
givetotheusersomebasictipstostartworkingwithGiDandmaketherestofthetutorials.
2.1Userinterface
ForfurtherinformationaboutGiDuserinterfacepleaseconsulttheGeneralaspects->Userinterfacesectioninthe
Referencemanual.
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|Postprocessready.
Postpfocessfinished*
Command:f留
Zoom:x1Nodes:0,Elements0Render:normal(-7.369336,-3222997,0)
2.1.1Changetheme
UsercanchoosebetweenBlackandClassicthemes,whichchangedrasticallytheGUIappearance.Usercanalsochoose
betweensomeiconsizesineachtheme.
TheseoptionscanbechangedinGiDThemeoptioninsideUtilities->Preferences->Graphical->Appearancetab.
.GiDTheme.M
Theme:GiDBlackN
M
ThemesizeMedium
Iconandimagescalefactor1
2.1.2Warnline
InsomeoftheoperationsmadeinGiDbytheuser,GiDgivesinformationaboutwhatisexpectedtodobytheuser.This
informationisveryusefulthefirsttimesGiDisusedasaguidelinefortheuser.
Warnline4
TheplacewereGiDshowsthiskindofinformationisthelowerpartofitsmainwindow.
Selectentitiestodrawitslabel
Added1newpointstotheselection.Entermorepoints.(ESCtoleave)
2.1.3Commandline
UsingGiD,sometimestheuserisaskedt
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