ADAMS-Vibration-振动分析模块教程PPT课件

.,1,ADAMS/Vibration振动分析模块教程,.,2,内容,了解模块功能；了解Vibration与Linear模块的区别；使用Vibration模块进行虚拟振动试验及方案设计。,.,3,VibrationIssuesFacingEngineersandDesigners,Howcomfortableisride,whetherinautomobile,airplane,railcar,oroff-roadmachinery?Willexcitationsinonepartofsysteminteractwithanotherpartofsystem?Whenproblemsoccur,howcantheybeisolated?,.,4,IndustryEffortsandMetrics,GoodvibrationcharacteristicsarepurchasemotivatorandimprovecustomersatisfactionNeedgoodwaytomeasuredesignOptimumNVHoftenconflictswithotherattributessuchasdurabilityorvehicledynamicperformanceNeedwaytobalancecompetingrequirementsSignificanteffortspenttounderstandandquantifycustomerNVHrequirementsintoobjectivetermsanddefinespecifictestsrelatingtocustomereventsCurrentmethodsareexpensive,.,5,IndustryEffortsandMetrics,NVHinvolvesbothobjectiveandsubjectivedevelopmentPartofprocesscanbequantifiedwithanalyticaltoolsSuppliersmust“tune”theirsystems/components(rightthefirsttime)toprototypevehicleorelsetheyareresponsibleforNVHresolutionNeedwaytostudysystemIssuesoftendiscoveredlateinprototypedevelopmentresultinmoneyandtimelossValueindesigningrightway,.,6,TheNeed,Awaytostudysystem-levelvibrationsthesamewayyoucannowstudysystem-levelmotionproblemsmuchfaster!,.,7,Solution:ExtendScopeofVirtualPrototyping,Motion/Performance,Safety,Durability/Fatigue,Noise/Vibration,.,8,Takeyoursystemtodifferentoperatingpointstoanalyzevibratorybehavior(withouthavingtocreatenewmodels)Includeeffectsofhydraulics,controls,andothersubsystemsonvibrationcharacteristicsAnalyzesystemmodesincludingattachmentandothernonlinearcharacteristics,ThreeReasonstoUseADAMS/Vibration,.,9,AnalyzeVibratoryBehaviorinDifferentConfigurations,SatelliteExample:SystemeigenvaluesshiftaccordingtoPaneldeploymentangleLockingconditionContactconditionActualspringratesThisshiftaffectsattitudecontrolmargin,pointingjittermagnitude,andstructuralloadingconditions,.,10,AnalyzeVibratoryBehaviorinDifferentConfigurations,RailcarExample:SystemeigenvaluesshiftaccordingtoEquivalentconicitySuspensionstiffnessesDampercharacteristicsThisshiftaffectsrailcarstabilityandrunningcomfort,.,11,IncludeEffectsofHydraulicsandControlsonSystemBehavior,HydraulicsExample:Applyinputvibrationtocontrolvalveandseeeffectatcylinderpressureandboommovementinfrequencyresponsefunctionplotsandanimations,.,12,AnalyzeSystemModesIncludingAttachmentCharacteristics,AutomotiveExample:EnginemountdisplacementsduetocombustionforcesindependencyofEnginemountcharacteristicsEnginemountpositionFrequencydomainanalysishelpsdesignersimproveenginemountinstallations,.,13,ADAMS/Vibration11.0Capabilities,FrequencydomaininputforcingfunctionsFrequencyresponsefunctioncalculationsModalparticipationtablesForcedvibrationanimationForcedvibrationplottingGeneratelinearsubsystems,.,14,HowDoesItWork?Simplified/UnifiedApproach,MotionorVibrationSimulationProcess,Input,Post-Processing,Solution,TimeorFrequencyDomainInputs,Plots,Animation,Tables,othertimeandfrequencydata,.,15,ADAMS/VibrationWalk-Through,Step1Createinputchannels,outputchannels,andactuators,Actuatorassociatedwithaninputchannel,SplinedefinesPSD,.,16,ADAMS/VibrationWalk-Through,Step2Runanalysis,Defineinputs/outputstouse,Defineoperatingpoint,frequencyrange,andsteps,.,17,ADAMS/VibrationWalk-Through,Step3Post-processingSystemModesFrequencyResponseFunctionsPowerSpectralDensityModalParticipationTables,.,18,例子：卫星振动特性分析,.,19,例子：卫星振动特性分析,系统的模态分析，且模态、振型变化,.,20,例子：卫星振动特性分析,仪器的力学环境。,.,21,例子：卫星振动特性分析,卫星适配器刚度阻尼如何选取？,.,22,回顾及问题,了解模块功能；了解Vibration与Linear模块的区别；使用Vibration模块进行虚拟振动试验及方案设计。,.,23,注意,