基于弹性中心的客车动力总成悬置系统布置

Powerset Mounting System Layout of Coach Based on Elastic Center

客车一般按照订单进行生产,配置多变,交车周期短,悬置系统设计变量众多,数值解耦优化效率较低。为此,根据客车动力总成纵向布置的特点,建立了六自由度动力总成悬置系统模型,论述了动力总成扭矩轴和对称安装的悬置组弹性中心的计算方法以及避免前后悬置垂向振动互相影响要满足的条件,给出了弹性中心靠近扭矩轴时悬置系统主要振动方向(z和θx方向)解耦的布置方法。对一款中巴订单车悬置系统进行弹性中心的解耦设计,结果表明该方法在悬置系统主要振动方向解耦效果显著,非常适合订单客车的悬置布置。

In coach production,the configuration is often changeable,delivery cycle is short,and mounting system design variables are numerous,leading to the low efficiency problems of numerical decoupling optimization. Based on the characteristics of the longitudinal layout of the powerset in coach,a 6-DOF model of powerset mounting system is established,and the calculation method of torque roll axis and the elastic center of the mounting group symmetrically installed and the conditions to be met to avoid the mutual influence of the vertical vibration of the front and rear mountings are discussed. A layout method of adjusting the elastic center to make it close to the torque axis to decouple the main vibration directions（ z and θx directions）of the system is proposed. The decoupling design of the elastic center of the mounting system of a mediumsized bus shows that this method has significant decoupling effect in the main vibration direction of the mounting system and is very suitable for the mounting layout of coach.