某电动车鹅卵石路行驶方向盘振动分析与优化  

Vibration Analysis and Optimization of an Electric Vehicle Steering Wheel on Cobblestone Road

作　　者：刘建广 靳豹[1] 范一凡[1] 刘俊刚[1] Liu Jianguang;Jin Bao;Fan Yifan;Liu Jungang(R&D Center of Great Wall Motor Company,Hebei Automobile Technology Innovation Center,Baoding 071000)

机构地区：[1]长城汽车股份有限公司技术中心,河北省汽车技术创新中心,保定071000

出　　处：《中国汽车》2024年第7期39-46,共8页China Auto

摘　　要：某电动车在匀速行驶过程中方向盘振动大,具体表现为以23 km/h的车速经过鹅卵石路时,方向盘振动明显,严重影响整车NVH用户体验,通过主观评价、客观数据测试以及整车状态下零部件模态特性的识别,发现方向盘28 Hz低频振动的现象,确认了后悬架X向平动和车身2阶弯曲耦合是问题的主因,验证了降低底盘激励力、模态合理避频、增加路径上的振动衰减三种控制策略,提升了该车型经过鹅卵石路方向盘振动品质表现,为改善相关问题提供了借鉴和参考。The steering wheel of an electric vehicle vibrates greatly during constant speed driving.The specific performance is that when passing through cobblestone road at a speed of 23 km/h,the steering wheel vibrates obviously,which seriously affects the NVH user experience of the vehicle.Through subjective evaluation,the objective data test and the identification of the modal characteristics of the components in the vehicle state found the phenomenon of 28 Hz low-frequency vibration of the steering wheel,and confirmed that the rear suspension X-direction flat motion and the body second-order bending coupling are the main causes of the problem,three control strategies of reducing chassis excitation force,reasonably avoiding modal frequency and increasing vibration attenuation on the path are verified,which improve the vibration quality performance of the steering wheel of the vehicle after cobblestone road,it provides reference and reference for improving related problems.

关 键 词：方向盘 低频振动 模态 传函 

分 类 号：U469.72[机械工程—车辆工程]