CATIA裝配有限元分析training.ppt

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 Filemenu 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 SaveManagement isaneasywaytosaveallmodifieddocumentsunderuser 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 partsmanagement Meshcreation 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 partsmanagement Propertiesmanagement NewR9 1 Selecttheappropriatepropertytype 2 Selectthepartgeometryentity PartBodyorOpenBody inthetree 3 Enterpropertyspecificationsasthecasemaybe Ameshpartmusthaveonlyonesingleproperty Asformeshparts wecanalsodeleteproperties Oncethemeshpartiscreated wehavetodefineitsproperty COPYRIGHTDASSAULTSYSTEMES2002 24 Mesh partsmanagement ModelCheckcommand NewR9 TheModelCheckcommandcanhelptheuserunderstandingtheDesign Analysislinks Thankstothelistofallthemeshpartsandproperties Highlightsthecorrespondingfeatures Justbeforecompute wecanchecktheconsistencyoftheFEMmodel Missingproperties Missingmaterial Missingsupport Diagnosticproblems Aftermodifications COPYRIGHTDASSAULTSYSTEMES2002 25 Mesh partsmanagement Analyzeofpartsmadeofseveralbodies 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 SpecifyapressurevalueorOpenaDataFileformapping 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 SpecifyvectorOrOpenadatafileformappinganexternalload 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 Fixdof s inAdvancedRestraintcase NB Rotationsareavailablewithshells butnotwithsolids 2 Selectanexistingaxissysteminthefeaturestree COPYRIGHTDASSAULTSYSTEMES2002 38 New AdvancedPre ProcessingTools Pre processingonpoints Wecanapplypre processingspecificationsonpointsandvertexWecanapplyitforLoads restraintsorMasses Itisavailableondifferenttypesofsupport VertexPointsfollowedbyFMSPointsfollowedbyOctreemesher 1 CreateaGSDpoint 2 Meshthepartwiththeconstrainedpoint 3 Applydistributedforce COPYRIGHTDASSAULTSYSTEMES2002 39 AdvancedPre ProcessingTools Masssets 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 onanexternalfilewhichpath snameisExternalStorage ThelinkbetweentheCATAnalysisdocumentandtheExternalStorageismaintainedaftertheendofasession inawaysimilartothelinkbetweenaCATPartandtheassociatedCATAnalysisdocument Itisrecommendedthatyoulocateyourexternalstoragewherethereissufficientspace TherearetwosolutionstoModifythestoragepathwhichare thetoolbarbuttonsorthespecificationtree 3 1 SpecifyingExternalStorage 1 5 1 Clickonthe Storage 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 Anewfilewillreplacethecorrespondingoldone 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 ifyouwantanestimationofthecomputationtime Aseriesofstatusmessages Meshing Factorization Solution informsyouabouttheprogressofthecomputingprocess 3 ClickOK orYes tolaunchthecomputation COPYRIGHTDASSAULTSYSTEMES2002 50 YoucaneditthedefaultvaluesoftheComputationparametersofaCaseSolutionasfollows Computing 2 4 1 Double clicktheSol