Femap Meshing Toolbox教程2

Femapv10MeshingWorkshopFemapv10UpdateTrainingMeshing-1TheMeshingToolboxIntroductionInthisexercise,youwillfamiliarizeyourselfwiththedifferentcontrolsavailableintheMeshingToolbox.•Locatesmallfeatures.•Combinecurvesandsurfaces.•Interactivelymodifymeshsizesandmeshlocations.Femapv10MeshingWorkshopMeshing-2Femapv10UpdateTrainingStep1:IdentifySmallFeaturesusingtheLocatorcontrolStartFemapv10andimportaFemapNeutralFile.•Fromeitheradesktopicon,orfromtheWindowsStartmenu,selecttheiconforFemapv10.•Selectthecommand,File,Import,FemapNeutral.•Selectthefile,Geometry\ex10a-Toolbox1.NEU.•Rotatetheviewintoanisometricorientationsimilartobelow.•ActivatetheLocatorcontrolsbyselectingtheToggleEntityLocatoriconintheMeshingToolboxpane.Femapv10MeshingWorkshopFemapv10UpdateTrainingMeshing-3ExpandtheoptionsunderLocateOptionsandShowOptionsfortheLocatorcontrols.ModifytwooftheShowOptions.•DisabletheoptionforAutoRotate.•EnabletheoptionforAutoZoom.Femapv10MeshingWorkshopMeshing-4Femapv10UpdateTrainingToidentifysmallfeatures,youmustselectoneoftheSearchForoptions.•ClickShortEdges.SincethedefaultBasedOnoptionissettoGlobalMeshSize(1unit)andthe%ofMeshSizeislessthanorequalto5%ofthemeshsize,theLocatorwillfindallcurveslessthanorequalto.05units.ClicktheShow4Curvesbutton.ThishighlightsthecurvesusingthemethodspecifiedinFemap’spreferencesorthesettingsforthemodelsetintheModelInfopane.Femapv10MeshingWorkshopFemapv10UpdateTrainingMeshing-5VisualizethesmallcurvesidentifiedwiththeLocator.•UsingtheEntityLocatorpulldownmenu,selectthecommand,First.SincetheoptionforAutoZoomisenabled,theviewwillautomaticallyzoomandcenteraroundthefirstshowedgelocated.•Again,usingtheEntityLocatorpulldownmenu,selecttheNext,Previous,Current,andLastcommandstoidentifyallfourcurves.Femapv10MeshingWorkshopMeshing-6Femapv10UpdateTrainingSaveyourFemapmodel.•SelecttheSaveiconontheModeltoolbar.•SavetheFemapmodelfileinyourexercisesfolderasex10-MeshingToolbox-1.MOD.Setmeshsizingforthesolid.UsingeithertheMesh,MeshControl,SizeonSolidcommand,orwiththeModelInfopanesetthefollowingmeshsizes:•ElementSize=.1•MaxAngleTolerance=15•DisabletheoptionforMaxElemonSmallFeature•ClickOKtosetthemeshsizeonthesolid.IntheLocatorcontrol,againclicktheSearchMethodoptionShortEdges.NotesincetheLocateOptions,IgnoreIf,Suppressedisenabled,andthemeshsizingsuppressedshortedges,thecurvesinitiallythatwereinitiallylocatedarenolongeridentified.SwitchtheSearchForoptiontoSurfaces.FitthemodelinthegraphicswindowwiththeCtrl+ahotkeyEnabletheoptionforSmallSurfaces.•SetthevalueforFitinRadiusto.125.ClickeithertheEnterkeyortheTabkeytoupdatethelocator.NotehowtheShowbuttonhasbeenupdatedtoShow8Surfaces.Femapv10MeshingWorkshopFemapv10UpdateTrainingMeshing-7Clickthebutton,Show8Surfaces.DisabletheoptionforSmallSurfaces.EnabletheoptionforSlivers.SincetheedgelengthofthesmallcurvesresultinverysmallsurfaceswithareaslessthantheSliverTolerance,thosesurfaceswiththesmalledgesarehighlighted.•ClicktheShow4Surfacesbutton.•DisabletheoptionforSlivers.EnabletheoptionforSpikes.•SincenoSpikesaredetected,disabletheSpikesoption.EnabletheoptionforByArea.•SettheoptionforAreaLessThanto.01.•Clickthebutton,Show4Surfaces.SettheShowOptions,AutoZoom,ZoomFactorto1.UsingtheToggleEntityIndicatormenu,walkthroughthehighlightedsurfaces.ClicktheToggleEntityLocatoricontoclosetheLocatorcontrols.SaveyourFemapmodel.Femapv10MeshingWorkshopMeshing-8Femapv10UpdateTrainingStep2:UsetheFeatureSuppressionControl.ExpandtheFeatureSuppressioncontroltoshowalloptions.ChangethecoloroptionsunderUpdateColorstosuityourpreferences.ClicktheRestoreAllInSolidsbuttontoremovesuppressionontheshortcurvesthatwassetduringtheassignmentofthemeshsizeonthepart.Femapv10MeshingWorkshopFemapv10UpdateTrainingMeshing-9ClicktheSelecticonintheMeshingToolboxpane.•Selectoneofthecurvesontheoneoftheholesinthepart.DeselecttheSelecticonintheMeshingToolboxpane.RefreshyourgraphicswindowusingtheCtrl+ghotkey.Notehowthecolorhaschangedontheholetoshowthattheholeissuppressedduetoselectingoneofthecurvesonthefeature.Femapv10MeshingWorkshopMeshing-10Femapv10UpdateTrainingClicktheShowSuppressedSurfacesbuttontohighlightthesuppressedfeature.ClicktheRestoreAllInModelbuttontorestoresuppressedfeatures.•ClickYesinthedialogforthequestion,OKtoRestoreAllSuppressedFeatures?.Femapv10MeshingWorkshopFemapv10UpdateTrainingMeshing-11Step3:UsetheFeatureRemovalControlActivateandexpandtheFeatureRemovalcontrol.ClickthebuttonforFeatureTypeSurfaces.ClicktheDialogSelecticonontheMeshingToolboxcontrolstoolbar.•Selecttwosurfacesthatdefineoneoftheholesinthepart.Notethattheholeisremovedfromthepart.Note:Femapdoesnothavetoolstorestorea“removed”feature.Torestoreremovedfeature(s),youwilleitherhaveto:1)Performan“Undo”operation.2)RereadthegeometryusingtheFile,Referencescommand.3)ManuallyrecreatefeaturesremovedwiththeFeatureRemovalcontrol.ApplytheTools,Undocommand(Ctrl+zhotkey)toundothefeatureremoval.SaveyourFemapmodel.Femapv10MeshingWorkshopMeshing-12Femapv10UpdateTrainingStep4:UsetheCombined/CompositeCurvesControlActivateandexpandtheCombined/CompositeCurvescontrol.Ac