Improving your Structural Mechanics Simulations with ANSYS 14.0
description
Transcript of Improving your Structural Mechanics Simulations with ANSYS 14.0
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2011ANSYS,Inc. October24,20111
ImprovingYourStructuralMechanicsSimulationswithRelease14.0
ToddMcDevitt,PhDPEProductStrategy&PlanningANSYS,Inc
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2011ANSYS,Inc. October24,20112
StructuralMechanicsThemes
MAPDL/WorkbenchIntegration
Physicscoupling
Rotatingmachines
Composites&FractureMechanics
ApplicationCustomization
Thinstructuresmodeling
Contactanalysis
Performance
AdvancedModeling
GeometryHandling
Listeningtoyourneeds,wehavebeenabletoidentifyanumberofthemeswhichformthebasisofourroadmapandguideourdevelopments
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WhatwillRelease14.0bringyou?
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Letsnowtakeacloserlookatsometopics
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MAPDL/WorkbenchIntegration
FiniteElementInformationAccesswithinANSYSMechanical
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SpotWelds
Connectionscreatedinternallyatthesolutionlevelareavailableandcanhelpunderstandtheresults
ReviewingConnections
WeakspringsandMPCcontactsasgeneratedbythesolver
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Nodescanbegroupedintonamedselectionsbased onselectionlogic,usinglocationsorothercharacteristics ormanualselections
SelectingNodes
BoxSelection NodePicking LassoSelection
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ApplyingLoadsandOrientationstoNodes
NodalOrientationallowsuserstoorientnodesinanarbitrarycoordinatesystem.
DirectFEloadsandboundaryconditions canbeappliedtonodeselections.
Nodesareorientedincylindricalsystemforloadsandboundaryconditiondefinitions
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ResultsonNodeSelections
Results aredisplayedonelementsforwhichallnodesareselected.
Nodesnamedselectionsallowtoscopeonspecificregionsofthemeshorremoveundesiredareas.
Resultswithfirstlayerofquadsremoved
Resultsonquadslayersonly
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RestartandDirectFELoads
NodalForcesandPressuresobjectscanbeaddedtoarestartanalysis withoutcausingtherestartpointstobecomeinvalid.
Otherloadscannowbemodifiedwithoutlosingtherestartpoints.
AnalysisSettingstabulardata:Norestartpointislost
Addedafterinitialsolve
SecondLoadstepmodifiedforrestart
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AvoidResolveswithPostCommands
Addingpostcommandsnippetsafterasolutiondoesnotrequireresolvingtheentiresolution.
Thisisthedefaultsettingiftheuseraddsapostcommandobject.
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MAPDL/WorkbenchIntegration
LinearDynamicsinANSYSMechanical
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WorkbenchandMechanicalenhancements
MSUPtransientanalysissupported
PrestressMSUPharmonic
Jointfeaturescannowbeusedinharmonics,randomvibrationanalysis
Reactionforce&momentresultsarenowsupported
ModalSuperpositionTransient
JointsinHarmonicAnalyses
Reaction ForcesinHarmonic Analyses
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PhysicsCoupling
DataMapping
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Motivation
Engineeringorganizationsoftenuseexternalfilestotransferquantitiesfromonesimulationtoanother.
Efficientmappingofpointclouddataisrequiredtoaccountformisalignment,nonmatchingunitsorscalingissues.
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SupportedDataTypes
NewatR14.0
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IncreasedAccuracy
Thesmoothness ofthemappeddatadependsonthedensityofthepointcloud.
Severalweightingoptionsareavailabletoaccommodatevariousdataquality.
Triangulation versus Kriging
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ValidatingtheMappedData
Visualtoolshavebeenimplementedtocontrolhowwellthedatahasbeenmappedontothetargetstructure
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ImportingMultipleFiles
Multiplefilescanbeimportedfortransientanalysesortohandlemappingstomultiplebodies
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RotatingMachines
StudyingRotordynamics inANSYSMechanical
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Motivation
ANSYSMechanicalusersneedtobeabletoquicklycreateshaftgeometriesaswellasanalyzedynamiccharacteristicsofrotatingsystems
Industrialfan(Venti Oelde)
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GeometryCreation
GeometriescanbeimportedfromaCADsystem orimportedfroma simpletextfiledefinitionforpreliminarydesign
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Import/ExportofBearingCharacteristics
ANSYSprovidesaninterfacethatallowstoimportbearingcharacteristics fromanexternalfile
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CampbellDiagrams
Campbelldiagramsareusedtoidentifycriticalspeedsofarotatingshaftforagivenrangeofshaftvelocities
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Composites
EnhancedAnalysisWorkflowandAdvancedFailureModelsforComposites
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Motivation
Efficientworkflowsandindepthanalysistoolsarerequiredtomodelandunderstandcomplexcompositesstructures
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ManuallyDefiningLayersonSimpleGeometries
Userscandefinesimplelayeredsections forashellbodyaswellasdefinethicknessesandanglesasparameters
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DefiningLayersonComplexGeometries
Forcomplexgeometries,theANSYSCompositePrepPosttoolisusedandlayerdefinitionsareimportedintheassemblymodelinANSYSMechanical.
Courtesy ofTUChemnitzandGHOSTBikesGmbH
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AdvancedFailureAnalysis
CrackgrowthsimulationbasedonVCCTisavailabletosimulatedelamination.
Progressivedamageissuitablefordeterminingtheultimatestrengthofthecomposite(lastplyfailureanalysis)
2Dlaminarcomposite
Initialcrack
Startofdamage(layer1)
Progresseddamage(layer1)
Progresseddamage(layer3)
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Customization
ANSYSDesignAssessment
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Motivation
Manyofyouhaveexpressedtheneedfor:ComputinganddisplayingspecificresultsBeabletoachievemorecomplexUserdefinedresults
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WhatisDesignAssessment?
TheDesignAssessmentsystemenablestheselectionandcombinationofupstreamresultsandtheabilitytooptionallyfurtherassessresultswithcustomizablescripts
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DesignAssessmentforAdvancedUserDefinedResults
DesignAssessmentenableuserstoextenduserdefinedresultscapabilitieswith:
ExpressionsusingmathematicaloperatorsassupportedbyPython
Coordinatesystems,UnitsSystems
Integrationoptions
Nodal,ElementNodal&Elementalresulttypes
ImportfromexternaltablesScriptusedtodisplayscalarelementdatastored
inanexternalfile
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ThinStructures
MeshConnections
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Motivation
Inordertoconnectmeshesofdifferentsurfacepartssoastosharenodesatintersections,usersdonotalwayswantorcannotmergethetopologiesatthegeometrylevel.Meshbasedconnectionsarerequired.
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MeshConnections
Meshconnectionsworkatpartlevel:AsapostmeshoperationBasepartmeshisstoredtoallowforquickchangesinconnections
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FurtherMeshingEnhancements
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VirtualTopologiesInteractiveEditing
Virtualtopologiesarehandledmoreinteractivelythroughdirectgraphicsinteractionratherthantreeobjects.
UserselectsentitiesthenappliesVToperations
DirectaccesstooperationsfromRMBmenu
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VTHardVertex,EdgeandFaceSplits
Hardverticescanbeaddedatanylocationonanedgeoraface.
Hardverticescanthenbeusedtocreatefacesplitsfromvirtualedges.
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ContactAnalysis
RigidBody&FlexibleDynamics
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Motivation
Manymechanismsandassemblieshavecomponentsthatoperatethroughcontact.
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PerformanceImprovements
Valve:158secelapsedtime(2xspeedup)
Piston:9secelapsedtime(7.5xspeedup)
Theapplicability,robustnessandefficiencyofthecontacthasbeenimprovedforspeedandaccuracyexpectatypical25xspeedup
Transitionandjumppredictionhavebeengreatlyimproved
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ProjectedContact
Improvedpressureresultswithsurfaceprojection
TheSurfaceProjectionBasedContactprovidesmoreaccurateresults(stresses,pressures,temperatures)andisnowalsoavailableforbondedMPCcontacts
Regularcontact Projectionbased
Smoothertemperatureresultsonamultilayeredstructure
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Contactaccuracyandrobustness
ContactstabilizationtechniquedampensrelativemotionsbetweenthecontactandtargetsurfacesforopencontactNewcontact
stabilizationpreventsrigidmotion
Adjusttotouchcausesrigidbodymotionandleavesagap
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Performance
FurtherbenefitsfromGPUboards
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Takingadvantageofthelatesthardwareismandatorytosolveyourlargemodels.
Acombinationofrelativelynewtechnologiesprovidesabreakthroughmeanstoreducethetimetosolution
Motivation
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DistributedANSYSSupportsGPUs
2.1MDOF,NonlinearStructuralAnalysisusingtheDistributedSparseSolver
GPUAccelerationcannowbeusedwithDistributedANSYStocombinethespeedofGPUtechnologyandthepowerofdistributedANSYS
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SpeedupfromGPUtechnology
SolderJointBenchmark 4MDOF,CreepStrainAnalysis
ResultsCourtesyofMicroConsult Engineering,GmbH
Linuxcluster:Eachnodecontains8IntelXeon5600seriescores,96GBRAM,NVIDIATeslaM2070,InfiniBand
MoldPCB
Solderballs
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AdvancedModeling
MaterialModels&Methods
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AnisotropicHyperelasticity plusViscoelasticityforstrainrateeffects
Hyperelasticity coupledwith PorePressureelement
ShapeMemoryAlloyenhancedwithsuperelasticity,Memoryeffect,NewYieldFunction,DifferentiatedModuli(Austenite,Martensite)
Holzapfel Model Capturethebehavioroffiberreinforcedtissue
AdvancedMaterialsforBiomechanicalApplications
HydrocephalusanalysisHyperelastic materialwithporousmedia
Stentmodelingusingshapememoryalloys
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Nonlinearmaterialssupportforcoupledfieldelements
Coupledfieldelementsforstronglycoupledthermomechanicalanalysisnowaccountsforplasticityinducedheatgenerationalongwithfrictioneffects
FrictionStir Welding includingheatgenerationduetofrictionandplasticdeformation
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MoistureDiffusion
Moistureinduceshygroscopicstressesandaltersthermalstresses.
Coupledfieldelementsallowtoincorporatemoistureeffectsinthermal,structuralandcoupledsimulations.
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AdvancedNonlinearMethods
Usercannowperform:Bucklingfromanonlinearprestressedstate withdeadloads(newsubspaceeigensolver)
3Drezoning forverylargedeformationsforawiderrangeofmaterialsandboundaryconditions.
HotRollingStructuralSteelAnalysiswith3DRezoning
Bucklingofaprestressedstiffenedcontainer
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Coupledstructures/acousticssimulations
Coupledproblemsaremodeledmoreefficiently:QuadratictetrahedralacousticselementsNewacousticssourcesAbsorbingareasEnhancedPMLformulation Nearandfarfieldparameters
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AdvancedModeling
BrakeSqueal
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ComplexEigensolve Animate:ComplexModeShape ContactStatusatPads
ANSYSSolutionforBrakeSqueal
CAD Mesh&ConnectionSetup&solver
PostProcessing
BiDirectionalCADConnectivity
AutomatedContactDetection
Providesforslidingcontactwithfriction Nomatchmeshneeded Supportshigherorderelements AutomatedMeshing
FlexibilitytouseLinear&Nonlinearsolvercapabilities
Rootlocusplots Correlationofmodes ListStrainenergypercomponentpermodeFrictionsensitivitystudy
Physicalprototypingtimeconsumingandexpensive Providemoreanalysisearlyinthedesigncycle ParametricStudybychangingfrictioncoefficient
RunsetofDOEs Reusesymmetricmodesandjustrununsymmetricpart Significanttimereduction
CanIncludeSquealandContactdamping Slidingvelocity
dependentFriction
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PhysicsCoupling
SystemOptimizationwithRigidBodyDynamicsandSimplorer cosimulation
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Motivation
Mostmechanismsandassembliesaremanagedviacontrolsystems.
Systemsimulation,includingthedetailsofthemechanismorassembly,areneededinordertoimprovemodelingaccuracy,fidelityandultimatelysystemoptimization.
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LinkingMechanicalandSimplorer
InputsandoutputsaredefinedaspinsintheMechanicalmodelandconnectedtotheschematicsofSimplorer
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SomeExamples
AircraftLandingGear
Simplorer schematicofhydrauliccircuitandcontrol
RBDmodel
RoboticArmControl
Traceofarmtrajectory
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Andthereismuchmore
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checktheReleaseNotes!
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ThinkalsooftheTechnologyDemonstrationGuide
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Questions?
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Appendix
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Customization
ApplicationCustomizationToolkit
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Motivation
AsaMechanicalUser,youmaywantto: CustomizemenusCreatenewloadsandboundaryconditionsCreatenewtypesofplotsReuseAPDLscriptswithoutcommandsnippets
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WhatistheApplicationCustomizationToolkit?
TheApplicationCustomizationToolkit isatoolthatfacilitates customizationofANSYSMechanical.
ItprovidesawaytoextendthefeaturesofferedbyANSYSproducts.
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ToolbarCustomizationthroughXMLFiles
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Convection_Blade_Computation
XMLdefinition:
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PythonDrivenLoadsandBoundaryConditionsPythonscript:
#Get thescoped geometry:propGeo =result.GetDPropertyFromName("Geometry")refIds =propGeo.Value
#Get therelated mesh andcreate thecomponent:forrefId inrefIds:
meshRegion =mesh.MeshRegion(refId)elementIds =meshRegion.Elementseid =aap.mesh.element[elementIds[0]].Idf.write("*get,ntyp,ELEM,"+eid.ToString()+",ATTR,TYPE\n")f.write("esel,s,type,,ntyp \ncm,component,ELEM")
#Get properties from thedetails view:propThick =load.GetDPropertyFromName("Thickness")thickness=propThick.ValuepropCoef =load.GetDPropertyFromName("FilmCoefficient")film_coefficient =propCoef.ValuepropTemp =load.GetDPropertyFromName("AmbientTemperature")temperature=propTemp.Value
#Inserttheparameters fortheAPDLcommands:f.write("thickness="+thickness.ToString()+"\n")f.write("film_coefficient="+film_coefficient.ToString()+"\n")f.write("temperature="+temperature.ToString()+"\n")
#Reuse thelegacy APDLmacros:f.write("/input,APDL_script_for_convection.inp\n")
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WritingAPDLCommandsFromtheNewDefinition
!APDL_script_for_convection.inp
!Inputparameters:esel,s,type,,10cm,component,ELEMthickness=1.1film_coefficient =120.temperature =22.
!Treatment:/prep7et,100,152keyop,100,8,2.et,1001,131keyo,1001,3,2sectype,1001,shellsecdata,thickness,10secoff,midcmsel,s,componentemodif,all,type,1001emodif,all,secnum,1001type,100esurffinialls/soluesel,s,type,,100nslesf,all,conv,film_coefficient,temperaturealls
APDL
WBMechanical
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AnExample:ACTdrivenSubmodeling
Userssimplyselectthecoarsemodelsresultsfile,allAPDLcommandsareautomaticallycreated nomoreneedforcommandblocks!
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AdvancedModeling
OffshoreStructures
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OvertheperiodofthedesignofanoffshorestructurefromConceptthroughFEEDandDetailedStructuralandEquipmentDesign thereareneedsformanydifferentanalysesrelatedtoglobalstructuraldesignandintegrityanddetailedcomponentlevelanalysis.Toensuredeliverytimeliness,andreliabilitywherecostsoffailurearesohigh,thereisconsiderablevalueincompatibilitybetweentherespectivetools.ThisisdeliveredbytheongoingintegrationofANSYSAQWAinWorkbenchanddeliveryofenhancedcapabilitiesinMechanical/MAPDLforoffshorestructuresanalysis.
Importantly,ANSYSStructuralMechanicsproductsnowdelivertheabilitytoconductbothglobalanddetailedanalysisofoffshorestructuressubjectedtovariouswaveandenvironmentalloadings.
GlobalOffshoreStructures
Localjointflexibilityanalysis
Globalhydrodynamicsandstructuralanalyses
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HydrodynamicTimeResponsesystemenhancementsinclude Fenders(similartocontact)
Allowsconnectionsbetween2structuresorbetweenastructureandafixedpoint
Articulations(similartojoints)
FurtherAQWAIntegrationinWorkbenchforMultiBodyWaveHydrodynamics
Offloadingarmrepresentedwithseriesoftypicalarticulations
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EnhancedEnvironmentalConditionsandCableBehaviorinAQWA
Introductionofmultidirectionalwavespectraallowsmorerealisticmodellingofrealwaveconditions,andisimportantfortheaccuratesimulationofmooredvesselsandoffshoreplatforms AlmostanycombinationofwavespectratobemodelledinthesolvermodulesLIBRIUM,DRIFTandtheHydrodynamicTimeResponsesysteminWorkbench
TomeetAPIstandard(RP2SK),nonlinearaxialstiffnesscanbeusedtodefineamooringline
GaussianformulatedwavespectrumnowavailableinthecoresolverandtheHydrodynamicTimeResponsesystem
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Diffractedwaveloading ProvidessimplifiedpressureloadingfromHydrodynamicsDiffractionsystems(AQWA)ontoMAPDLsystem
HarmonicWaveLoading Regularwaveloadingnowavailableforharmonicresponseanalyses
ANSYSFATJACK(forbeamjointfatigueofframedstructures)automaticallyreadstheRSTfiledataforharmonicloadcases
ANSYSBEAMCHECK(formemberchecksonframedstructures)andANSYSFATJACKnowdeliveredwithMechanicalinstallation SeeDesignAssessmentforfurtherinformation
ExtendedWaveLoadinginMechanicalandlinkstoRegulatoryCodeChecks
VesselLoadingTransferfromAQWAtoMechanicalCourtesyofVuyk EngineeringRotterdam
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Aeroelastic coupling(forwindturbinesupportstructures) Sequential
Allowingstructural(ANSYS)andaeroelastic (3rdparty)analysestoberunindependently
JustuseaprovidedMAPDLmacrotowriteoutinputdatafortheaeroelastic analysis
Fullycoupled Cosimulationofstructuralandaeroelastic tools CustombuildofMAPDLrequired,withamacrotomanagethedataavailabilityfromandtoMAPDL
CouplingMechanicalwith3rd PartyAeroelastic ToolsforOffshoreWindTurbineModeling
ImagesCourtesyofREpower SystemsAG