某轻型驱动桥动力吸振器设计

Dynamic Vibration Absorber Designed for a Light Rear Drive Axle

以某轻型客车后驱动桥为研究对象,经CAE分析和模态试验验证表明:后桥的一阶固有频率处于该频率带范围内,后桥共振是引起振动极值的主要原因之一。基于该驱动桥的基本参数进行动力吸振器设计,确定动力吸振器的关键参数。对吸振器进行动力学仿真分析和整车搭载试验。结果表明:仿真分析结果与试验结果相吻合,加装动力吸振器能较为显著地降低驱动桥振动,提升NVH性能。

Taking a light passenger rear drive axle as research object, through CAE analysis and modal test demonstration, the first order frequency of rear axle is within this frequency range. So, the rear axle resonance is one of mainly reasons for the extreme vibration value appears. To design dy- namic vibration absorber based on the basic parameters of rear axle and determined the key parameters of the dynamic vibration absorber. Dynamics simulation analysis and vehicle test verification results show installation of dynamic vibration absorber can significantly reduce the vibration of rear drive axle and improve NVH performance.