纯电动客车振动噪声特性

Vibration and noise characteristics of electric bus

对某纯电动客车加速和匀速工况下的振动噪声进行了试验研究,利用LMS声振信号采集系统采集车内的振动噪声数据,并采用频谱分析、阶次追踪等方法对振动噪声激励源进行分析,总结出电动车振动噪声特性。结果表明,匀速行驶时车内振动主要是悬架传来的路面激励;加速行驶时电机的激励较明显,尤其是在电机开关频率附近的高频激励。本文研究可为下一步电动车振动噪声的改进提供依据。

In this paper the vibration and noise of an electric bus were studied under the conditions of uniform speed and acceleration.The LMS instruments were applied to collect the vibration and noise signals of the electric bus.The source and the characteristics of the noise and vibration were studied by spectrum and order tracking analysis.The results show that the vibration inside the bus is mainly induced by the road excitation via the suspensions under uniform speed condition,while the motor noise is sharp under accelerating condition especially in the switch frequency.This study may provide useful information for reducing the noise and vibration of electric vehicles.