非比例阻尼和陀螺效应对动力总成悬置系统的影响研究

A Study on the Effect of Non-proportional Damping and Gyroscopic Moment on Powertrain Mounting System

基于能量法解耦理论,应用遗传算法对某客车动力总成悬置系统进行优化,并对优化后的悬置系统研究了非比例阻尼和陀螺效应对解耦结果的影响规律。结果表明,非比例阻尼对系统的振动特性影响较明显,主要是使平动和转动间的振动耦合程度加大;非比例阻尼程度越高,其影响越大。陀螺力矩主要在低频区域影响动力总成俯仰和横摆的响应,并使两者之间的振动耦合加强。

Based on energy decoupling theory,an optimization on the powertrain mounting system of a bus is conducted with genetic algorithm,and the rule of the effects of non-proportional damping and gyroscopic effect on vibration decoupling is studied for optimized mounting system.The results show that non-proportional damping has significant influence on the vibration characteristics of system,which mainly aggravate the coupling between translational and rotational vibrations.Its effect is getting more sever with the rise in the degree of non-proportional damping.The effects of gyro moment are mainly on the pitch and yaw responses of powertain and the intensification of vibration coupling between them in low frequency range.