2023年11月第19卷第4期系统仿真技术SystemSimulationTechnologyNov.，2023Vol.19，No.4某乘用车电驱动总成NVH问题仿真分析及优化黄河清*，黄凤琴，李相旺，李欣，刘安旗（东风汽车公司技术中心，湖北武汉430058）摘要：某纯电动乘用车电驱动总成将电机控制器（MCU）与直流高压转低压变换器（DC/DC）进行集成，但布置空间的限制导致可靠性及NVH（噪声、振动与声振粗糙度/Noise、Vibration、Harshness）目标难以达成。台架试验过程中发现3200r/min以下NVH表现较差且MCU及DC/DC盖板存在共振现象。本研究对台架试验中的可靠性及NVH风险通过仿真手段进行全面解析，并对仿真分析出现的问题逐一优化解决。经过仿真-设计优化后，3200r/min转速范围内电驱动总成MCU及DC/DC壳体NVH表现较差的问题得到有效解决，且MCU及DC/DC新设计方案各项NVH与可靠性评价指标均满足设计要求，顺利通过电驱动总成NVH及可靠耐久台架试验。关键词:电机控制器；直流高压转低压变换器；NVH；频响分析；结构优化设计SimulationAnalysisandOptimizationofNVHProblemofElectricDriveAssemblyofaPassengerCarHUANGHeqing*，HUANGFengqin，LIXiangwang，LIXin，LIUAnqi（TechnicalCenter，DongFengMotorCo.，Wuhan430058，China）Abstract：TheelectricdriveassemblyofapureelectricpassengercarintegratestheMotorControlUnit（MCU）withtheDChighvoltagetolowvoltageconverter（DC/DC）.ThelimitationoflayoutspacemakesitdifficulttoachievethereliabilityandNVHobjectives.DuringtheNVHbenchtest，itisfoundthattheNVHperformancebelow3200r/minispoorandtheMCU-DC/DCcoverplatehasresonance.Inthispaper，thereliabilityandNVHriskinbenchtestarecomprehensivelyanalyzedbysimulation，andtheproblemsareoptimizedandsolvedonebyoneaccordingtothesimulationanalysisresults.Aftersimulationdesignoptimization，theproblemofpoorNVHperformanceofelectricdriveassemblycontrollerandDC/DChousingwithin3200r/minspeedrangehasbeeneffectivelysolved，andallNVHandreliabilityevaluationindexesofMCU-DC/DCnewdesignschememeetthedesignrequirements，andsuccessfullypasstheNVHanddurabilitybenchtestofelectricdriveassembly.Keywords：MCU；DC/DC；NVH；frequencyresponseanalysis；structureoptimizationdesign电机控制器（Motorcontrolunit，MCU）和直流高压转低压变换器（DC...
