ANSYS R17 拓扑优化ACT使用方法PPT学习课件

ANSYSTopologyOptimizationACTExtension,ANSYSInc.,17.0Release,ANSYSTopologyOptimization-Overview,ACTApplicationname:ANSYSTopologyOptimizationACTApplicationversion:R17.0Targetapplication:WBMechanicalANSYScompatibleversion:R17.0Description:ExposesTopologyOptimizationcapabilitiesinWorkbenchMechanical.TheoptimizedmodelcanthenbeexportedandeditedinSpaceClaimtoperformsubsequentvalidationanalysis,optionallyimportintoaCADsystem,and/orbesenttoa3Dprinterformanufacture.,Information,Pleasepayattentiontoparagraph9oftheCLICKWRAPSOFTWARELICENSEAGREEMENTFORACSEXTENSIONSregardingTECHNICALENHANCEMENTSANDCUSTOMERSUPPORT(TECS):“TECSisnotincludedwiththeProgram(s)”Reportanyissueorprovidefeedbackrelatedtothisapppleasecontact:Steve.Pilz,BinaryAppInstallation(1),InstallingfromtheACTStartPage:Fromtheprojectpage,selectthe“ACTStartPage”optionClickon“ExtensionManager”Press“+”symbolinthetoprightcornerItwillopenafiledialogtoselecttheappropriate“*.wbex”binaryfileTheextensionisinstalledLoadingtheextension:FromtheExtensionManager,clickonyourextensionandchooseLoadExtensionTheextensionisloaded,Notes:Theextensiontobeinstalledwillbestoredinthefollowinglocation:%AppData%Ansysv170ACTextensionsTheinstallationwillcreateafolderinthislocation,inadditiontothe.wbexfile,BinaryAppInstallation(2),Oncethebinaryextensionisinstalledatdefaultlocation,onecanmovethe*.wbexandthefoldertoanyotherlocationDefaultpath:%AppData%Ansysv170ACTextensionsNewpath:Anylocationonyourmachine,shareddriveetc.AllusersinterestedinusingtheextensionneedtoincludethatpathintheirWorkbenchOptionsInthe“Tools”menu,selectthe“Options”Select“Extensions”inthepopuppanelAddthepathunder“AdditionalExtensionsFolder”,DefineadditionalfoldersinwhichACTwillsearchforextensionsinordertoexposethemintheExtensionManager,1,2,3,Notes:Duringthescanoftheavailableextensions,thefolderswillbeanalyzedaccordingtothefollowingorder:Theapplicationdatafolder(e.g.%AppData%Ansysv170ACTextensions)Theadditionalfoldersdefinedinthe“AdditionalExtensionFolders”propertyTheinstallationfolderThe“extensions”folderpartofthecurrentWorkbenchproject(iftheprojectwaspreviouslysavedwiththeextension)Ifanextensionisavailableinmorethanoneoftheselocations,the1stoneaccordingtothescanorderisused,UserDocumentationContents,OverviewUserGuideDesignOptimizationValidationAnalysis,ANSYSTopologyOptimizationACTExtension,Summaryofcapabilities:ThisACTAppinstallsaTopologyOptimizationSystemintheWorkbenchProjectSchematicTheACTAppexposesTopologyOptimizationcapabilitiesinWorkbenchMechanicalVariousoptimizationobjectiveandconstraintresponsetypesareavailableforoptimizingStaticStructuraldesignsTheshapeoftheoptimizeddesigncanbeviewedandsavedintheformofanSTLfileSpaceClaimcanbeusedtocleanup,modifyandconverttheSTLfileintoasolidmodelThedesigncanbeverifiedbyimportingthesolidmodelintoadownstreamStaticStructuralSystemandperformingvalidationanalysisTheSTLfileoftheoptimizedmodelcanbesenttoa3Dprinterformanufacture,CapabilitiesOverview:TopologyOptimization,ObjectiveFunctionsSingleandMultiComplianceLocalDegreeofFreedomLocalDisplacementReactionForceVolume,Mass,ConstraintFunctionsLocalDegreeofFreedomReactionForceVolume,MassLocalStressGlobalStress,ManufacturingConstraintsMaximumMemberSizeMinimumMemberSizeSymmetryExtrusion,MechanicalPhysicsLinearStressSteadyStateLinearBondedContactSolidBodies(2Dand3D),CapabilitiesOverview:ExposureandWorkflow(1),StaticStructuralProblemSetupSetupinStaticStructuralSystemOptionallySolvetoobtainreferencesolutionOptimizeDesignLinktodownstreamTopologyOptimizationSystem(ACTExtension)DefineDesignObjectives,DesignandManufacturingConstraintsSolvetoobtainoptimizedmodelVisualize,inspectand“extract”shapeofoptimizedmodelExport/SaveSTLfileofoptimizedmodel,CapabilitiesOverview:ExposureandWorkflow(2),ValidateDesignEditSTLmodelinSpaceClaimandconverttosolidgeometryCreatedownstreamStaticStructuralSystemtovalidateoptimizeddesignImportmodelintodownstreamStaticStructuralSystem,remeshandreapplyproblemsetupPerformvalidationanalysis,UserGuide:StaticStructuralProblemSetup,StaticStructuralProblemSetupforOptimization,Create“DesignSpace”Creategeometryfromscratch,orImportpartorassemblytobeoptimizedApplyloads,supports,materialprops,etc.GuidelinesformeshingdesignspaceSetPhysicsPreferencetoMechanicalUsequadrilateralelements(MidSideNodesKept)PreferredelementsareHexsfollowedbyWedges,followedbyTetsWherepossibleuseaconstantelementsize,UserGuide:DesignOptimization,TopologyOptimizationAppInstallation,InstallingfromtheACTStartPage:Fromtheprojectpage,selectthe“ACTStartPage”optionClickon“ExtensionManager”Press“+”symbolinthetoprightcornerItwillopenafiledialogtoselectthedownloaded“TopologyOptimization.wbex”binaryfileTheextensionisinstalledLoadingtheextension:FromtheExtensionManager,clickonyourextensionandchooseLoadExtensionTheextensionisloaded,Notes:Theextensiontobeinstalledwillbestoredinthefollowinglocation:%AppData%Ansysv170ACTextensionsTheinstallationwillcreateafolderinthislocation,inadditiontothe.wbexfile,AccessingtheTopologyOptimizationSystem,LinkingtheTopologyOptimizationSystemtotheStaticStructuralSystemintroducesthe“AnsysTopologyOptimization”folderintheWorkbenchMechanicalProjectOutlineTopologyOptimizationcontrolscanbe“Inserted”usingthisfolderThesecontrolsarealsoavailableontheWorkbenchMechanicalToolbarAnalysisSettingsexposesvarioussolversettingsandcontrolsDefaultsettingsareappropriateformostcasesNote:TopologyOptimizationsolutionmustconvergebeforeresultscanbeviewed.Tip:AroughandquicksolutioncanbeobtainedbyrelaxingtheConvergenceToleranceto1%,SpecifyAreasoftheModeltobeOptimizedandAreastobeExcluded,Insertthe“DesignRegion”controlandscopetoareastobeoptimizedMaybeanentireassembly,asub-assembly,oramulti-orsingle-bodypartInsertthe“Exclusion”controltoidentifyareasoftheDesignRegionwherematerialshouldnotberemovedMaybeanyGeometrySelectionorNamedSelectionNote:Exclusionsmayalsobeappliedtoselectiveareasofthemesh.UsetheWorksheetScopingMethodoftheNamedSelectionscontroltoselectthetargetmeshregion.,SpecifyDesignOptimizationObjectives,Insertthe“Objective”controlandselectdesiredObjectiveResponseTypeandcorrespondingGoal.FollowingResponseTypesaresupportedinR17.0SingleandMultipleComplianceLocalDegreeofFreedomLocalDisplacementReactionForceVolumeMassNote:OnlyoneObjectivecanbeusedperanalysisNote:Multipleloadcasesmaybeusedperanalysis.EachloadcaseshouldrepresentasinglestepintheStaticStructuralproblemsetup.E.g.,threeloadstepswillrequiretheNumberofStepsundertheAnalysisSettingsControltobesetto3,SpecifyDesignOptimizationConstraints,Insertthe“Constraint”controlandselectdesiredConstraintResponseTypeandcorrespondingsettings.FollowingResponseTypesaresupportedinR17.0LocalDegreeofFreedomReactionForceVolumeMassLocalStressGlobalStress,Note:InR17.0LocalDegreeofFreedomandReactionForceConstraintscanbescopedtoasinglemeshnodeonly,andtheLocalStressConstraintcanbescopedtoasinglemeshelementonly.ImportantNote:TheproblemdefinitionwillbeincompleteifasingleConstraintisusedthathasthesameResponseTypeasthatselectedintheObjective-e.g.,asingleVolume(orMass)ConstraintincombinationwithVolume(orMass)Objective.IfthegoalistoobtainthestiffestpossiblestructureatagivenfractionoftheDesignSpaceVolume(orMass),usetheSingleorMultipleComplianceObjectiveincombinationwithaVolume(orMass)Constraint.ImportantNote:SpecialcareshouldbetakenwhenapplyingLocalDegreeofFreedom,ReactionForce,LocalStressandGlobalStressConstraintstoensurethedesignoptimizationproblemstatementiswell-defined.ItisstronglyrecommendedthatthecorrespondingStructuralStaticproblembesolvedfirstontheDesignSpace(i.e.,un-optimizedmodel)todevelopa“feel”forappropriatelowerand/orupperboundsforsettingtheseconstraints.E.g.,settinganUpperBoundvaluefortheGlobalStressConstraintthatissignificantlylowerthantheMaximumStressencounteredinsolvingtheun-optimizedmodelisnotarealisticconstraintandwilllikelyleadtoaSolverError.,SpecifyManufacturingConstraints,FollowingmanufacturingconstraintsaresupportedinR17.0MinimumMemberSizeMaximumMemberSizeExtrusionSymmetry,Note:Toensurepropernumericalresolution,itisrecommendedthataMinimumMemberSizeConstraintalwaysbeappliedanditsvaluetobesettoatleast2.5timesthetypicalmeshelementsizeNote:TheapplicationoftheExtrusionorSymmetryConstraintsrequiresthatthemeshreflecttheextrudedorsymmetrycharacteristicsoftheconstraint.E.g.,whenapplyinganExtrusionConstraintintheX-direction,themeshshouldbegeneratedinsuchawaythatitalsoextrudesintheX-direction.TypicallyinsuchcasesonewillusetheSweeporMultiZonemeshmethods.Note:TheSymmetryandExtrusionConstraintscannotbecombinedinagivensimulationNote:AsuiteofexamplesareavailableintheACTextensionpackagethatdemonstratethesetupofOptimizationObjectivesandConstraintsforarangeofproblems,LaunchTopologyOptimizer,MonitorSolutionConvergence,Tolaunchtheoptimizer,right-clickontheSolutionfolderundertheAnsysTopologyOptimizationfolderandselect“Solve”Note:Sharedmemoryparallel(SMP)processingissupportedanduptothemaximumnumberofthephysicalCPUscanbeusedTherearethreewaystomonitorsolutionconvergenceSolveroutputinSolutionInformationWorksheetviewIterationprogresstextwindowlaunchesautomaticallySolutionConvergenceGraphsNote:Theprogressingsolutioncanbestopped,butnotinterruptedNote:SolutionmustconvergebeforetheresultscanberetrievedTip:TheSolutionConvergencegraphandtabledonotgetautomaticallyrefreshedonceactivatedfromtheShowdropdowncommand.ToupdatetheSolutionConvergencegraphandtablemanually,clearthedataviatheHidedropdowncommand,andthenreissuetheShowcommand.,RetrievingOptimizerResults,TheOptimizerreturnsa3Dsolutionfieldofpseudodensityelementalvaluesthatrangefrom0.0to1.0.Avaluecloseto1indicatesmaterialisexperiencingloadandmustberetained,avaluecloseto0indicatesthematerialisredundantandmayberemoved.FromtheSolutionfolder,Insert“Values”and/or“AveragedNodeValues”toretrievethesolution“Values”representtherawpseudodensitiesdefinedatelementcentroids“AveragedNodalValues”representthesmoothedpseudodensitiesmappedtotheelementnodesImportantNote:Itisstronglyrecommendedthatthe“AverageNodeValues”resultbeusedforvisualizingtheoptimizerresults,especiallyforvisualizingtheshapeoftheoptimizedmodelandextractingitforvalidationanalysisinadownstreamWorkbenchMechanicalSystem.SeeNextslide.,VisualizeandExportOptimizedShape,Bestwaytovisualizethe3Dshapeoftheoptimizedmodelistouse“CappedIsosurface”contouringcommandwiththe“BottomCappedIsoSurface”optionThesliderbarmaybeusedtovisualizehowtheshapeoftheoptimizedmodelchangeswithdifferentvaluesofpseudodensityLowervaluesofpseudodensityleadto“chunkier”shapes,highervaluesleadto“slender”shapes.ImportantNote:Youshoulduseintuitionandengineeringjudgementtopickthepseudodensityvaluethatresultsinthe“best”optimizedshape.Tip:Itisgoodpracticetoerronthesideofcautionandresisttheurgetoremovetoomuchmaterial!Typicalvaluesofpseudodensityrangefrom0.3to0.7.Toexporttheoptimizedshape,rightclickonAverageNodeValuesandselectExportSTLFileTip:Toensureportabilityoftheproject,savetheSTLfileintheuser_filessubdirectoryoftheWorkbenchProjects*_filesdirectory,UserGuide:ValidationAnalysis,EditSTLFileinSpaceClaim(1),TheSTLfileexportedfromWBMechanicalisnotsuitableforperformingvalidationanalysisorforsendingtoa3DprinterImporttheSTLfileintoSpaceClaimto:Fixintersecting,overlappingfacetsMakeSTLsurfacemeshwatertightCoarsentoreducethenumberoffacetsSmoothorganicsurfacesgeneratedbyoptimizerOptionally,addmorematerialnearboltholes,areasofcontactetc.ConvertbacktosolidgeometryandexporttodownstreamWorkbenchMechanicalSystemtoperformdesignvalidationanalysisImportantnotes:TheFacetscapabilityinSpaceClaimisusedtoeditSTLgeometryAseparatelicenseisrequiredtousetheFacetscapabilityUseSpaceClaimOptionstoactivateFacetstabintheGUIFileSpaceClaimOptionsLicenseCheckSTLPrepcheckbox,EditSTLFileinSpaceClaim(2),Importantnotes:Onimport,explicitlysetSTLunitstobesameasunitsintheoriginalDesignSpaceGeometryfileUseMeasurecommandtoconfirmmodelhascorrectlengthunitsafterimportTip:ItisrecommendedthattheoriginalDesignSpacealsobeimportedintoSpaceClaim.Thisprovidestheoptionofreusingpartsfromtheoriginalgeometrytomodifytheoptimizedgeometry.Importantnotes:Usethe“CheckMesh”commandtochecktheimportedrawSTLmodelforerrorsItisstronglyrecommendedthatyouusethe“AutoFix”meshcommandfirsttoautomaticallyfixallormostoftheerrorsOthercommandsunderCleanup,Organize,andModifycanbeusedtofixanyremainingerrorsandobtainavalidfacetedgeometry,EditSTLFileinSpaceClaim(3),AfterobtainingavalidSTLgeometryyoumayproceedtosmooththemodelandreducethenumberoffacetsinreadinessforconvertingtoasolidmodelYoumayuseacombinationofthe“Reduce”and“Smooth”commandsunderAdjust.Anotherpowerfuloptionforreducingandsmoothingthefacetsinonestep,isthe“Shrinkwrap”commandunderCreate.Youmayoptionallywishtomodifytheoptimizedmodelbyaddingmorematerialincriticalareas,suchasthosenearhighstressareasaroundboltholesNote:SpaceClaimprovidesarichsetoftoolsforeditingandmanipulatingfacetedgeometry.PleaserefertoSpaceClaimuserdocumentationandvideostolearnmoreabouthowbesttousethesetoolsforeditingyourSTLmodels,CoarseSTLmodelusingcombinationofReduceandSmoothcommands,RefinedSTLmodelwheresurfacesfromoriginalCADmodelhavebeenusedtoextrudematerialnearboltholesandmergewithbracket.TheShrinkwrapcommandisusedtocoarsenandsmooththefacets,ConverttoSolidGeometry,Toperformadesignvalidationstudyontheoptimizedmodel,theSTLgeometrymustfirstbeconvertedtosolidgeometrySelectthecleanedupSTLgeometryintheGUItree,rightclickandselect:ConverttosolidMergefacesNote:The“Mergefaces”optionreducesthenumberoffacesintheconvertedsolidmodelbymergingfacetsonflatsurfaces.ThisfurtherreducesthenumberofnurbsfaceswhichinturnhelpsreducethesizeofthesolidmodelfilethatisgeneratedFinally,savethesolidGeometryfileasanativeSpaceClaimfilefordesignvalidationanalysisTip:Toensureportabilityoftheproject,savethefileintheuser_filessubdirectoryoftheWorkbenchProjects*_filesdirectory,PerformDesignValidation(1),Createa“Duplicate”oftheStaticStructuralSystem(SystemAinFigurebelow)andplaceitdownstreamoftheAnsysTopologyOptimizationSystem(SystemB)TheduplicateStaticStructuralSystem(SystemC)containsboundaryconditionsandothersettingsthatcanbereusedtoperformvalidationanalysisontheoptimizedmodel,RightclickontheGeometrycellofSystemCand“ReplaceGeometry”withthesolidgeometryoftheoptimizedmodelexportedfromSpaceClaimEdittheModelcellinSystemCtolaunchWorkbenchMechanical.Click“Yes”toreadtheoptimizedmodelgeometry.Onstartup,theoldDesignSpacegeometryisreplacedbythenewoptimizedmodelgeometryinWorkbe