、自适应、界面友好的计算机科学与工程分析前后处理系统GiD 用户手册

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.

<

q

♦

7-

£

几

米L

哈X

0

|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