扭转梁悬架优化与整车操纵稳定性-分析

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1、OPTIMIZATIONOFTWISTBEAMSUSPENSIONANDANALYSISOFVEHICLEHANDLINGANDTABILITYABSTRACTHandlingandstabilityisanimportantvehicleproperty.Itreflectstheabilityofthevehicleinresponsetothedriver'sinstructionsexactly,andtheabilitytorestoretheoriginalmotionstatewhenthevehicleisdisturbed.Suspensionisa

2、nimportantpartofthechassis.TheK&Ccharacteristicsaffecthandlingandstabilitysignificantly.Becauseofthesimplestructure,lowcost,andhasmoreadvantagesinkinematics,thetwistbeamsuspensioniswidelyusedinfamilycars.Itisanimportantmeansofchassisdeveloping.Simulatingandoptimizethetwistbeamsuspension

3、,andevaluatingvehicleperformanceisanimportantmeansforchassispositivedevelopment.Thisthesisistooptimizethetwistbeamsuspensionandanalysisthehandlingandstabilityofanelectricalcar.ThetwistbeamsuspensionandvehiclemodelwerebuiltbythedynamicsoftwareADAMS/Car.Optimizedsuspensioncharacteristicsf

4、ortwistbeamsuspensionhardpointsandbushingstiffnessparameters,thenanalyzevehiclehandlingandstability.Theresultsshowthattheoptimizationcanprovideagoodvehiclehandlingandstability.First,thispaperanalyzedthestructuralcharacteristicsofthetwistbeamsuspension.Itestablishedrigidandflexiblecoupli

5、ngtwistbeamsuspensionandMacPhersonfrontsuspensionmodel,andbuiltavehiclemodelwithothersubsystems.Basedontheinitialtwistbeamsuspension,testedandanalysisedtheK&Ccharacteristics,thenanalyzedthetrendsoftoeangle,camber,wheellateraldisplacementandverticaldisplacementparameters.Theresultsproved

6、thattheinitialdesignofthetwistbeamrearsuspensionbasicallymeetthedesignrequirements.Toensurethatthevehiclehasgoodhandlingandstability,suspensionK&Cpropertiesneedtobefurtheroptimized.Then,accordingtothesuspensionK&Ccharacteristics,usingresponsesurfacemethodtotestandanalysisthesuspensionha

7、rdpointsandbushingstiffnesssensitivity.Selectedsomeimportanthardpointcoordinatesandbushingstiffnessastheoptimizationfactorsbytheresultofsensitivity.TheoptimalsolutionobtainedwithmethodofimprovedII万方数据non-dominatedsortinggeneticalgorithm.Bycontrastingsuspensioncharacteristicsbef