基于虚拟样机的摩托车多体系统行驶动态特性分析-振动与控制专业论文.docx

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2018-05-05 发布于上海
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基于虚拟样机的摩托车多体系统行驶动态特性分析-振动与控制专业论文.docx

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基于虚拟样机的摩托车多体系统行驶动态特性分析-振动与控制专业论文

ABSTRACTAskeyperformanceindex,ridingstability,maneuverabilityandvibrationcomfort capacityofmotorcycleareinvestigatedonthebasisofthequalitativeandquantitative analysisforalgebraicanddifferentialequationonthemotionanddyanmicsof motorcyclenumericalmodel.Motorcycleismultibodysystemwithsophisticated topologicalnon-treeconfigurationmadeofmechanical,electricaly,hydraulicaland controllingsystem,andturnstobehighspeedmachinewithlighterweight.Since motorcyclesubjectstolargedegreeoffreedomandroughrunningcondition,itishard tomakeelaboratequantitativeanalysisforitsdynamicbehaviorfromthesimplified modelwithlowerdegreeoffreedom.Simutaneously,intraditionaldesignfornew motorcycle,repetitativecyclefordesign,mock-upandtestistime-consumingand costly;someperformancetestsareunpractical;non-linearsuspensionsystemishard toadjust;roadtestscouldnotproducesameresultsinrepetitionbymore uncontrollability,allaboveretardtheprocedureofmotorcycleresearchand development.Thispaperisdevotedtoestablishaccuratemotorcyclevirtualprototype onthebasisofmultibodysystemdynamicsunderroadstochasticexcitationandhigh frequencyengineexcitationinordertofulfillthesimulationformotorcycledynamic responsein systematicalway,moreover,flexiblemultibodysystemis appliedto investigatethedynamicbehaviorontheconditionthatnon-linearelementsisadded intothesystem,especiallywithhighspeedpartsflexibility.Themaincontentand consequencein thispaper as follows:Applyvitualprototypingtoestablishmotorcycledigitalmodeland body-vehicle-roadmultibodysystem,whichworkundervirtualtestenvironment.The comparisonfordynamicpropertyisperformedbetweenthesimplifiedmodelof vehiclelumpedmasssystemandhigh-fidelityvirtualprototypeaccordingto topologicalconfigurationanddynamicaldifferentialalgebraicequationsothatthe methodofquantitativeanalysisofmotorcycledynamics,theeffectofsimulation analysis byvirtual prototypeis also verified byreal test.Establish tyredynamicmodelinADAMSwhileroadroughnessvalueinMATLAB accordingtopowerspectrumdensityofdifferentroadsinput