搭载行星减速器的纯电动客车振动试验研究

行星减速器为车辆传动系统提供期望传动比的同时,对车辆振动舒适性也会产生特定的影响.本文针对某搭载行星减速器的纯电动客车进行实车振动试验,综合应用计权均方根加速度评价、频谱分析、常相干分析和阶次分析的方法,探讨整车振动特性;与中央直驱式纯电动客车进行对比分析,评价行星减速器对纯电动客车振动舒适性的影响.结果表明,纯电动客...

Experimental Study on Vibration of a Pure Electric Bus with a Planetary Gearbox

The planetary gearbox can provide a desired transmission ratio for the vehicle transmission sys?tem,whereas it affects the vibration characteristics of the vehicle.In this paper,the vibration test of an electric bus equipped with a planetary gearbox is carried out to study the vehicle vibration characteristics by methods of weighted acceleration root?mean?square evaluation,frequency spectrum analysis,coherent analysis and order analysis.After that,the comparative analysis with the central direct drive electric bus is conducted to evaluate the impact of plane?tary gearbox on the vibration comfort of the electric bus.The results indicate that equipping a gearbox helps the mo?tor to achieve optimal working condition,which significantly improves the vibration comfort of the rear interior of the bus.However,the sun gear eccentric leads to a modulation sideband in the vibration signal of the middle interior of the bus,whose modulation frequency is the rotation frequency of the planet carrier,which affects the vibration com?fort of the middle part of the bus to some extent.