最新PATRAN中如何修补模型间隙幻灯片.ppt

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1、PATRAN中如何修补模型间隙Workshop8–SurfaceMeshForNoncongruentSurfacesObjectivesImportgeometricsurfacesfromaMSC.Patranneutralfile.Observethemanygapsbetweenadjacentsurfaceedges.Meshthesurfaceswithtriaelements,thenconnectelementswherethereareinternalfreeelementedge

2、s.Createageometricsurfacefromthetriamesh.Meshthenewsurface.Workshop8–SurfaceMeshForNoncongruentSurfacesStep2.ImportaMSC.PatranNeutralFileWithSurfacesImporttheneutralfilecalledshell_prt.out.1.File/Import.SelectNeutralasSource.Locatethefilenamednon_cong_

3、surfs.out.ClickApply.ClickYes.ClickYes.abcdefThisiswhattheimportedsurfacesshouldlooklike.LookatthegapsStep2.ImportanMSC.PatranNeutralFileWithSurfaces(Cont.)Step3.ShowtheDistanceBetweentwoPointsDeterminethedistancebetweentwoadjacentpoints.Thiswillhelpin

4、thedeterminationofthevalueoftheglobaledgelengthforsubsequentPavermeshing.Geometry:Show/Point/Distance.SelectPoint231underFirstPointList.SelectPoint370underSecondPointList.ClickApply.accbbdStep4.Create2-DMeshCreate2-DmeshusingPaverforsetofsurfaces.Eleme

5、nts:Create/Mesh/Surface.SelectTria,Paver,andTria3.UncheckAutomaticCalculation.Enter2.0asGlobalEdgeLength.SelectallsurfacesforSurfaceList.ClickApply.abcdefStep5.CloseGapsBetweenAdjacentTriaElementsClosethegapsinthemodelby“sewing”themeshtogether.The“Sew”

6、commandissimilartoEquivalence.Elements:Modify/Mesh/Sew.Enter6.0asTargetElementEdgeLength.ClickonTriaElementListandselectallelements.ClickApply.abcdShowwheretheelementfreeedgesareElements:Verify/Element/BoundariesSelectFreeEdgesasDisplayType.ClickApply.

7、Step6.LookatElementFreeEdgeBoundariesabcStep7.DeleteOriginalGeometryandCreateNewSurfaceDeletetheoriginalgeometryforvisualclarity,andcreateasurfacefromtheexisting2-Dtriameshwithagap/hole.Geometry:Delete/Surface.ClickonSurfaceListandselectallsurfaces.Cli

8、ckApply.Geometry:Create/Surface/Mesh.CheckDeleteOriginalElements.ClickonElementsListandselectallelements.ChooseNoneforInnerLoopOptions.ChooseFastforSurfaceCreationMethods.ClickApply.abcdefghiThisiswhatthenewsurfaceshouldlooklike.Step7.D