CATIA装配有限元分析trainingPPT课件

COPYRIGHTDASSAULTSYSTEMES2002,1,GenerativePartStructuralAnalysis,CATIATrainingFoils,Version5Release9June2002EDU-CAT-E-GPS-FF-V5R9,COPYRIGHTDASSAULTSYSTEMES2002,2,ObjectivesofthecourseInthiscourseyouwilllearnhowtoperformStaticandModalAnalyses(createanalysisdocuments,computeandvisualize)onasinglePart.TargetedaudienceCATIAV5UsersPrerequisitesMechanicalDesignFundamentalsinCATIAV5,GenerativePartStructuralAnalysis,1.5days,COPYRIGHTDASSAULTSYSTEMES2002,3,TableofContents(1/2),IntroductiontoGPSAnalysisp.51.1.AccessingtheWorkbenchp.61.2.UserInterfacep.71.3.UserSettingsp.10StaticAnalysisPre-Processingp.142.1.CreatinganewAnalysisDocumentp.162.2.SavingAnalysisDocumentsp.192.3.Mesh-partsmanagementp.222.4.DefineRestraintsp.262.5.DefineLoadsp.302.6.AdvancedPre-ProcessingToolsp.362.7.Beamelementsp.40ResultsComputationofaStaticAnalysisp.433.1.SpecifyingExternalStoragep.443.2.Computingp.49StaticResultsVisualizationandRefinementp.534.1.ImageCreationp.544.2.ImagesLayoutp.604.3.ResultsManagementp.614.4.OtherCapabilitiesp.674.5.HistoricofComputationp.694.6.ParabolicElementTypep.704.7.GlobalandLocalMeshRefinementp.714.8.MeshAdaptativityp.734.9.KnowledgewareforAnalysisp.77,COPYRIGHTDASSAULTSYSTEMES2002,4,TableofContents(2/2),VirtualPartp.835.1.TheVariousTransmissionTypesListp.845.2.ExamplesShowingVariousTransmissionTypesp.855.3.ExampleofRigidSpringVirtualpartsusep.865.4.ApplyingActionstoVirtualPartsp.875.5.VirtualPartssharingasinglehandlerpointp.89DynamicPre-ProcessingandComputationp.906.1.CreatingAdditionalMassEquipmentp.926.2.UnrestrainedorRestrainedPartp.946.3.ComputingtheAnalysisp.96DynamicsResultsVisualizationp.987.1.ImageCreationp.997.2.ResultsManagementp.102ElementstestswithELFINIsolverp.1048.1.TE4andTE10comparisonp.1058.2.StaticAnalysisp.1068.2.FrequencyAnalysisp.1078.3.BucklingAnalysisp.108FrequentlyAskedQuestionsp.109,COPYRIGHTDASSAULTSYSTEMES2002,5,Inthislesson,youwilllearnabouttheGenerativePartStructuralAnalysisWorkbenchby:AccessingTheWorkbenchUserInterfaceUserSettings,1.IntroductiontoGPSAnalysis,COPYRIGHTDASSAULTSYSTEMES2002,6,1.1.AccessingtheWorkbench,Inthislesson,youwilllearnabouttheGenerativePartStructuralAnalysisWorkbench.,BesurethatthePartbeingstudiedhasamaterialapplied.ThisactioncanonlybeperformedinthePartDesignWorkbench,3-ModalorStaticAnalysis.AnewCATAnalysisdocumentiscreated.,2-Analysis&Simulation,1-Start,COPYRIGHTDASSAULTSYSTEMES2002,7,1.2.UserInterface-Toolbars,Restraints,ExternalStorageManagement,Analysisreporting,Loads,ModelManager,Compute,Images,VirtualpartsManagerandmass,COPYRIGHTDASSAULTSYSTEMES2002,8,UserInterface-Icons,MassEquipmentMass,AnalysisResultsBasicAnalysisReportHistoricOfComputationsListing,SolverToolsStorageLocationClearStorageTemporaryDataDirectory,ModelmanagerTetrahedron,OctreeandBeammeshingElementtypeandlocalmeshSolidpropertyShellpropertyBeampropertyModelCheck,VirtualpartsmanagerVirtualpartsPeriodicityconditions,New!,New!,New!,COPYRIGHTDASSAULTSYSTEMES2002,9,AnalysisTree,AssociatedGenerativePart,Pre-ProcessingInput,ImagesofResults,UserInterface-SpecificationTree,MeshpartsProperties,ExternalStorage,MeshpartsSpecifications,COPYRIGHTDASSAULTSYSTEMES2002,10,Thisenablesyoutofasteraccesstheanalysisworkbench.,1.3.UserSettings-ShortcutOfAnalysisIcon,2-Transfer“GenerativeStructuralAnalysis”fromAvailabletoFavorites,1-Select“Customize”fromToolsmenu,3-AccessAnalysisWorkbenchthroughthisicon,COPYRIGHTDASSAULTSYSTEMES2002,11,InPartDesignWorkbench,customizeRenderStylebyaddingmaterialvisualization.Thiswillalsoenableyoutoviewanalysisimagesinaverage-isovisualizationmode.WewillactivateMaterialssothatmaterialrenderstylesaredisplayed,UserSettings-CustomizingViewModes,2-Clickon“ApplyCustomizedView”,3-Activate“Materials”andclickOK.,1-SelectRenderStylefromtheViewmenu,COPYRIGHTDASSAULTSYSTEMES2002,12,Thisenhancesthevisualizationofselectedfaces.,UserSettings-HighlightingFacesandEdges,1-Select“Options”fromtheToolsmenu,2-Click“Display”,3-Click“Navigation”,4-Activate“Highlightfacesandedges”,COPYRIGHTDASSAULTSYSTEMES2002,13,UserSettings-Show/NoShowVisualization,1-Select“Options”fromthe“Tools”menu,3-Click“Tree”,2-Click“Display”,4-ActivateVisualizationofShow/NoShow,COPYRIGHTDASSAULTSYSTEMES2002,14,Inthislesson,youwilllearnhowtocreateanewAnalysisDocument,howtosaveitandhowtodefineRestraintsandLoadsonaPart.CreateaNewAnalysisDocumentSaveAnalysisDocumentsDefineRestraintsDefineLoadsAdvancedPre-ProcessingTools,2.StaticAnalysisPre-Processing,COPYRIGHTDASSAULTSYSTEMES2002,15,GeneralProcessforaStaticAnalysis,EnsurethatparthasmaterialdefinedthenOpenStaticAnalysisWorkbench,ApplyRestraintstothemodel,ApplyLoadstothemodel,AnalyzetheResults,RefinetheAnalysis,PerformComputation,CreateImages,COPYRIGHTDASSAULTSYSTEMES2002,16,AMaterialmustbeappliedtothestudiedPart.ThiscanonlybepeformedinthePartDesignWorkbench.,1-ClickontheMaterialicon,2-SelectaMaterial,4-Apply,2.1.DocumentCreation-AssigningMaterials,5-Check,3-SelectaPart(onthegeometryorinthetree),COPYRIGHTDASSAULTSYSTEMES2002,17,NewAnalysisDocuments,entitledCATAnalysisfiles,canbecreatedinvariousways.,Thereare3waystocreateanewAnalysisDocument:,DocumentCreation-ThreeWays,WorkbenchIcon,Startmenu,COPYRIGHTDASSAULTSYSTEMES2002,18,HereishowtocreateanewAnalysisDocumentusingtheStartmenu.,DocumentCreation-UsingStartMenu,1-Click“Start”,2-Click“GenerativeStructuralAnalysis”,3-SelectStaticorFrequencyAnalysis,COPYRIGHTDASSAULTSYSTEMES2002,19,TherearevariouswaystosaveanAnalysisDocumentanditsparentdocuments.Itisimportanttoachievethiscorrectlywithanassemblyanalysisdocument,fortheassemblyhastobeproperlylinkedwithallthepartsitismadefrom.Onlythosedocumentsthathavebeenmodifiedwillbesavedorproposedforthesaving.,2.2.SavinganAnalysisDocument,SavewillsavetheactiveAnalysisDocumentSaveAs.issimilartoSave,butitallowsyoutospecifythenameandfolderfortheactiveAnalysisDocumentSaveAllwillproposesavingallopendocumentsandchildrenofthesedocuments,COPYRIGHTDASSAULTSYSTEMES2002,20,SaveManagementisaneasywaytosaveallmodifieddocumentsunderuser-specifiednames.,Allmodifiedopendocumentswillbeproposedforsaving,regardlessofwhichdocumentisactive,DocumentSaving-UnderSpecifiedNames,1-Select“SaveManagement”,2-Specifywhichdocumentstobesaved,COPYRIGHTDASSAULTSYSTEMES2002,21,“SendTo”isaneasywaytosavealllinkeddocumentsinauserspecifieddirectory.,Availablefiles,Filesthatwillbesaved,DocumentSaving-“SendTo”Mechanism,Usethisoptionifyouwantthedirectorystructureoftheselectedfileslisttobeduplicated.Elsetheselectedfileswillbecopieddirectlyunderthetargetdirectory.,1-Select“SendTo”&“Directory”,2-Usethesearrowstoswitchselectedfilesbetween“Canbecopied”and“Willbecopied”,4-Selectthetargetdirectory,3-Clickheretomodifytheselectedtargetname,2-Usethesesarrowstoswitchallthefilesbetween“Canbecopied”and“Willbecopied”,COPYRIGHTDASSAULTSYSTEMES2002,22,2.3.Mesh-partsmanagementMeshcreation&destruction,NewR9,Tocreateormodifymesh-parts,clickontheappropriatemesh-parttoolbaricon,Octreetetrahedronmeshforsolidgeometry,1.Selectthemeshpartinthetree.2.Contextualmenu,andDelete.,Octreetrianglemeshforsurfacemesh,Beammeshingforwire-framegeometry,WecanalsodeleteameshpartcreatedfromanautomaticmesherorFMS,1.Selectthegeometrytomesh.2.Selectthecorrespondingmeshtype.3.Entermeshspecifications,COPYRIGHTDASSAULTSYSTEMES2002,23,Mesh-partsmanagementPropertiesmanagement,NewR9,1.Selecttheappropriatepropertytype.2.Selectthepartgeometryentity(PartBodyorOpenBody)inthetree.3.Enterpropertyspecificationsasthecasemaybe.,Ameshpartmusthaveonlyonesingleproperty.,Asformeshparts,wecanalsodeleteproperties.,Oncethemeshpartiscreated,wehavetodefineitsproperty,COPYRIGHTDASSAULTSYSTEMES2002,24,Mesh-partsmanagementModelCheckcommand,NewR9,TheModelCheckcommandcanhelptheuserunderstandingtheDesign-Analysislinks.Thankstothelistofallthemeshpartsandproperties.Highlightsthecorrespondingfeatures.Justbeforecompute,wecanchecktheconsistencyoftheFEMmodel:Missingproperties.Missingmaterial.Missingsupport.Diagnosticproblems.,Aftermodifications,COPYRIGHTDASSAULTSYSTEMES2002,25,Mesh-partsmanagementAnalyzeofpartsmadeofseveralbodies,NewR9,WecananalyzepartswhichhaveseveralGSDbodiesEachbodyhasitsownmaterial.Severalmeshpartswillbecreated(oneforeachbody).Then,wecanapplydifferentthicknessesforeachmeshpart.,Severalbodies,Severalmeshparts,COPYRIGHTDASSAULTSYSTEMES2002,26,Clampsarerestraintsappliedtosurfaceorcurvegeometries,onwhichallnodesaretobeblockedinthesubsequentanalysis.,2.4.DefineRestraints-Clamps,1-Clickonthe“Clamp”Iconinthe“Restrain”Toolbar,2-Selectthegeometrysupport(s)(SurfacesorEdges).,3-Click“OK”,Symbolsassociatedtoanulltranslationinalldirectionsoftheselectedgeometryaredisplayed.,AClampobjectappearsintheSpecificationTreeundertheactiveRestraintsobjectsset.,Anyselectablegeometryishighlightedwhenyoudragthecursoroverit.,COPYRIGHTDASSAULTSYSTEMES2002,27,Surfaceslider(3Tr.&1Rot.),Slider(1Tr.),Slidingpivot(1Tr.&1Rot.),Balljoint(3Rot.)andPivot(1Rot.).SurfaceslidercanbedirectlyappliedonsurfaceswhereasotherRestraintsmustbeappliedonavirtualpart(See5.4.),1-ClickonSurfaceSliderIcon,SymbolsonGeometry,FeaturesTree,DefineRestraints-MechanicalRestraints,2-SelecttheGeometrySupport(s)(Surfaces),3-Click“OK”,COPYRIGHTDASSAULTSYSTEMES2002,28,AdvancedRestraintsaregenericrestraintsallowingyoutofixanycombinationofavailablenodaldegreesoffreedom(dof)onarbitrarygeometries.,2-Selectaxistype,DefineRestraints-AdvancedRestraints,1-Selectthesupport(s)(SurfacesorEdges),3-Activatedegreestobefixed,Therotationdegreesarerelevantonlyforstructuralelementmeshes(i.e.shellelements),orVirtualParts.,COPYRIGHTDASSAULTSYSTEMES2002,29,Iso-staticRestraintsareStaticallyDefiniteRestraintsallowingyoutosimplysupportaBody.,DefineRestraints-Iso-staticRestraints,1-Clickonthe“iso-staticrestraints”Icon,2-Selectageometry,3-ClickOK,COPYRIGHTDASSAULTSYSTEMES2002,30,Pressuresareintensiveloadsrepresentinguniformscalarpressurefieldsappliedtosurfacegeometries,hencetheforcedirectioniseverywherenormaltothesurface.,1-Clickonthe“Pressure”Icon,SymbolsrepresentingthePressureLoadsaredisplayed.,ALoadsobjectappearsintheFeaturesTreeundertheactiveLoadsobjectsset.,2.5.DefineLoads-PressureLoads,2-Selectthegeometrysupport(s)(Surfaces).Anyselectablegeometryishighlightedwhenyoudragthecursoroverit.,4-Click“OK”,3-SpecifyapressurevalueorOpenaDatamapping,COPYRIGHTDASSAULTSYSTEMES2002,31,DistributedForces(Moments)areforcesystemsstaticallyequivalenttoagivenpureforce(couple)resultantatagivenpoint,distributedonavirtualpartoronageometricselection.,DefineLoads-DistributedForcesandMoments,1-Selectsupport(s)(SurfacesorEdges),2-Selectaxistype,3-Specifyforce,COPYRIGHTDASSAULTSYSTEMES2002,32,Accelerationsareintensiveloadsrepresentingmassbodyforce(acceleration)fieldsofuniformmagnitudeappliedtoparts.,DefineLoads-Acceleration(GravityBodyForces),1-Selectsupport(s)(SurfacesorEdges),2-Selectaxistype,3-Specifyvector,COPYRIGHTDASSAULTSYSTEMES2002,33,RotationForcesareintensiveloadsrepresentingmassbodyforce(acceleration)fieldsinducedbyrotationalmotionappliedtoparts.,DefineLoads-RotationForces,1-Selectsupport(s)(SurfacesorEdges),2-Selectaxis,3-Specifyanglevelocityandacceleration(ifnecessary),COPYRIGHTDASSAULTSYSTEMES2002,34,ForceDensitiesareintensiveloadsrepresentingline(surface)tractionfieldsorvolumebodyforcefields,ofuniformmagnitude,appliedtoeithercurve(surface)geometries,ortoparts.,DefineLoads-ForceDensities,1-Selectsupport(s),2-Selectaxistype,3-SpecifyvectorOrOpenadatamappinganexternalload,COPYRIGHTDASSAULTSYSTEMES2002,35,EnforcedDisplacementsareequivalentloadsappliedtosupportgeometries,resultingforthesubsequentanalysisinassigningnon-zerovaluestodisplacementsinpreviouslyrestraineddirections.AnEnforcedDisplacementobjectisbydefinitionassociatedtoaRestraintobject.,DefineLoads-EnforcedDisplacements,1-Selectrestraint,2-Entervaluesforeachrestraineddof,COPYRIGHTDASSAULTSYSTEMES2002,36,Insteadofspecifyingeachcomponentoftheforcevector,youcansimplydefinetheforcedirectionbyusingthecompass.Thiswillensurethattheforceisdefinedrelativelytothepart,whateveritspositioning.,2.6.AdvancedPre-ProcessingTools-ForcewithCompass,1-Clickontheloadsicon,2-Selectsupportandspecifyforcevectornorm,3-Dragthecompassbyhandlingtheredsquareanddropitontheappropriatesurface,4-UseCompasstodefinevectordirection,COPYRIGHTDASSAULTSYSTEMES2002,37,Insteadofusingtheglobalaxissystem,youcanuseanimplicitoneifyouwantyourpre-processingtobedefinedwithrespecttothepart.YoucanalsospecifyauserdefinedaxissystemifyouhavecreatedoneinPartDesign.Inthatcase,thedofdirectionsofanadvancedrestraint,orthecomponentsofaforce,willbeprocessedwithrespecttothethespecifiedAxissystem.TheirinterpretationwillfurtherdependonyourAxisTypechoice.Therestrainrotationsareavailableonlywithsurfacicgeometry.,AdvancedPre-ProcessingTools-AxisSystems,1-Selectauserdefinedaxissystemtype,3-Selectaxissystemlocalorientation,4-Fixdofs(inAdvancedRestraintcase)NB:Rotationsareavailablewithshells,butnotwithsolids.,2-Selectanexistingaxissysteminthefeaturestree,COPYRIGHTDASSAULTSYSTEMES2002,38,New!,AdvancedPre-ProcessingToolsPre-processingonpoints,Wecanapplypre-processingspecificationsonpointsandvertexWecanapplyitforLoads,restraintsorMasses.Itisavailableondifferenttypesofsupport:VertexPointsfollowedbyFMSPointsfollowedbyOctreemesher,1.CreateaGSDpoint,2.Meshthepartwiththeconstrainedpoint,3.Applydistributedforce,COPYRIGHTDASSAULTSYSTEMES2002,39,AdvancedPre-ProcessingToolsMasssets,Masssetscanbeincludedinastaticcase:Usedforloadingsbasedoninertiaeffect(acceleration,rotation).Takeintoaccountthemassmodelingcapabilitiesintheloaddefinition.,1.InsertanewStaticCase,2.SelectMasses:IfthereisalreadyaMasssetinthefirstStaticcase,youcanselectitasReference.IfthereisnoMassset,selectNew.,NewR9,COPYRIGHTDASSAULTSYSTEMES2002,40,NewR9,2.7.Beamelements:wire-framemesher,AssociativitywiththeGenerativeShapeDesignWorkbench.UseJOINcapabilitytobuildcomplexwire-framefeature.Anautomaticmeshpartgenerationismadeifanexternalviewhasbeendefined.,Designyourwire-framestructureinGSD.UseJOINcommandifthereareseveralbeams.ApplymaterialontheJoinentitycreated.DoanexternalviewandgotoGPS,thenyouwillhavetochangedefaultmeshpropertiescreated.OrgodirectlytoGPSandclickonBeammesher.DoMeshVisualization(orcomputeMeshOnly).,COPYRIGHTDASSAULTSYSTEMES2002,41,NewR9,Beamelements:Beampropertiesdefinition,ApplyapropertyonasinglebeamoronaJoinfeatureSelecttheBeampropertyicon.Enterthebeamcaracteristics.,AfterclickingOK,alocalaxissystemisdiplayedatthecentroid,showingthesectionorientation.,Theorientationpointmustnotbecolinearwiththebeamaxis,evenifthesectionisaxisymetric!,COPYRIGHTDASSAULTSYSTEMES2002,42,NewR9,Beamelements:Beampre-processingandstaticanalysis,Pre-processingonbeamelementsPutGSDpointsinNo-Showmode,soastokeepfromselectingthem(else:mesherrorsgeneration).Putaclamptooneofthevertex.Applyadistributedforcetotheothervertex.,ComputeandPost-processingonbeamelementsWecandisplaydeformationanddisplacements(otherpost-processingoptionswithESTcapabilities).,InGAS,wecanalsodohybridanalysiswithsolid-shell-wireframegeometry.,COPYRIGHTDASSAULTSYSTEMES2002,43,Inthislesson,youwilllearnhowtocomputeaStaticAnalysis.SpecifyingExternalStorageComputing,3.ResultsComputationofaStaticAnalysis,COPYRIGHTDASSAULTSYSTEMES2002,44,AllELFINISolvercomputationsaresystematicallystoredinastructuredwayoutofcorememory,onanexternalpathsnameisExternalStorage.ThelinkbetweentheCATAnalysisdocumentandtheExternalStorageismaintainedaftertheendofasession,inawaysimilartothelinkbetweenaCATPartandtheassociatedCATAnalysisdocument.Itisrecommendedthatyoulocateyourexternalstoragewherethereissufficientspace.TherearetwosolutionstoModifythestoragepathwhichare:thetoolbarbuttonsorthespecificationtree.,3.1.SpecifyingExternalStorage(1/5),1-ClickontheStorage”iconintheSolverToolstoolbar,The“ElfiniStorageLocation”dialogboxisdisplayed,3-SelectapathfortheExternalStoragedirectories,4-ClickSave,2-ClicktheModifybutton,5-ClickOK,COPYRIGHTDASSAULTSYSTEMES2002,45,SpecifyingExternalStorage(2/5),Theothermethodistousethetreespecifications.,Adialogboxisdisplayed,Thenewpathappearsinthefeaturestree,1-Doubleclickonthepathyouwanttomodify,2-Selectanewpath,3-ClickOK,COPYRIGHTDASSAULTSYSTEMES2002,46,SpecifyingExternalStorage(3/5),Eachnewcomputationwillgeneratefiles.Anewreplacethecorrespondingoldone.Beforelaunchinganewcomputationyoumayclearthe“ComputationData”and/orthe“Results”ifyouwantittosupersedethepreviousone.,Thefollowingdatastructureiscreatedintheexternalstoragedirectories:,1-Clickthe“ClearStorage”icon,2-Selecttheactionyouwant,Computationfiles,Resultfiles,COPYRIGHTDASSAULTSYSTEMES2002,47,Tocalculate,thecomputerneedsatemporarystoragelocationwhichiscleanedupwhentheassociatedanalysissessionisclosed.,SpecifyingExternalStorage(4/5),Withthisoptionyoucanindicatethedatastoragelocation.,1-Clickthisicon,2-Click”Modify”toselectanewdirectory,3-Selectanewpath,4-5-ValidatewithOK,COPYRIGHTDASSAULTSYSTEMES2002,48,SpecifyingExternalStorage(5/5),AnalysisstoragecreationCATAnalysisResultsandCATAnalysisComputationsfilesarecreated:ThefirsttimethecomputationislaunchedIftheuserexplicitlydefinetheirlocationAnanalysisdocumentwhichcontainsonlyspecificationscanbestoredwithoutlinkstoAnalysisstorage.Thesefilesarenotseenanymoreinpartnersapplicationsthatdoesnotneedthem.AnalysisstoragereadDataarecopiedonlywhencomputationorpost-processingneedtoaccessit.ThereisasignificanttimereductionofComputedAnalysisDocumentloading.Thereisnomoreuselessdatareading(ex:readacomputeddocument,modifythemesh,andre-computing).AnalysisstoragedeletionCATAnalysisResultsandCATAnalysisComputationscanbedeletedmanualy(equivalenttoClearcapability).,NewR9,COPYRIGHTDASSAULTSYSTEMES2002,49,1-ClicktheComputeicon.,3.2.Computing(1/4),OnceyouhavesuccessfullydefinedRestraintsandLoadsinyourStaticAnalysisCase,youcanundertaketheactualresultscomputationofthatcase.,2-ActivatetheAll(default)option.,Uponsuccessfulcompletionofthecomputationthestatusofallobjectsintheanalysisfeaturestreeischangedtovalid.,TheComputedialogboxisdisplayed.,Activate“Preview”ifyouwantanestimationofthecomputationti