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某后驱MPV车型共振与轰鸣问题分析优化.docx

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某后驱MPV车型共振与轰鸣问题分析优化 Abstract Theresonanceandboomingproblemsinacertainrear-wheel-driveMPVwereanalyzedandoptimizedinthispaper.Thecausesofresonanceandboomingwereanalyzedfromaspectsofpowertrain,suspensionsystemandaerodynamics.Then,theoptimizationmeasureswereproposedfromvibrationabsorption,noisereductionandstructuralimprovement.ThesimulationresultsshowedthattheproposedoptimizationmeasureseffectivelyreducedtheresonanceandboomingproblemsintheMPV. Introduction Nowadays,withtheincreasingdemandforspaciousvehicles,MPVshavebecomemoreandmorepopularonthemarket.However,someMPVsmayhaveresonanceandboomingproblems,whichnotonlyaffectdrivingcomfortbutalsomaycausepotentialsafetyhazards.Therefore,itisnecessarytoanalyzeandoptimizetheresonanceandboomingproblemsintheMPV. Inthispaper,acertainrear-wheel-driveMPVwastakenastheresearchobject.Thecausesofresonanceandboomingwereanalyzedfromaspectsofpowertrain,suspensionsystemandaerodynamics.Then,theoptimizationmeasureswereproposedfromvibrationabsorption,noisereductionandstructuralimprovement.Finally,thesimulationresultswerepresentedtovalidatetheproposedoptimizationmeasures. AnalysisofResonanceandBoomingCauses Powertrain ThepowertrainisoneofthemainsourcesofvibrationandnoiseintheMPV.Theenginemountstiffnessanddampinghaveagreatimpactontheenginevibrationtransfertothecabin.Thedirectinjectionsystemandturbochargeralsoincreasethenoiselevel.Inaddition,thedrivetrainresonancescausedbythecouplingofthepowertrainandtherearaxlemayalsoresultinresonanceandbooming. SuspensionSystem ThesuspensionsystemisanotherimportantfactoraffectingtheridecomfortoftheMPV.Thespringanddamperparametershaveasignificantimpactontheresonanceandboomingproblems.Theoptimizationofsuspensionsystemparameterscaneffectivelyreducetheresonanceandboomingproblems. Aerodynamics TheaerodynamicnoiseisanotherimportantfactoraffectingthenoiselevelintheMPV.Thewindowdesign,shapeandwindnoisesuppressionmeasurescanallaffecttheaerodynamicnoiselevel. OptimizationMeasures Basedontheanalysisofthecausesofresonanceand