基于惯性参数的动力总成悬置系统解耦分析

Decoupling Analysis of Powertrain Mount Systems Based on Inertial Parameters

基于传统的动力总成悬置系统6自由度模型,可得到与6自由度相关的解耦率。而通过商业软件Adams建立动力总成悬置系统模型并利用vibration插件进行计算时,平动方向上的解耦率与传统6自由度模型相同,而转动方向上的三个分量被分解为6个与惯性参数相关的分量。基于Adams模态能量表达,用Matlab软件编写动力总成悬置系统的解耦率计算程序,利用多目标优化方法对悬置系统进行优化设计。结果表明,对悬置刚度进行优化能有效提高解耦率。

The decoupling rate associated with 6 DOFs is obtained based on the traditional 6-DOF model of powertrain mounting systems. The model of the powertrain suspension system is built by means of commercial software Adams, and the plug-in vibration code is used for calculation. In the calculation, the decoupling rate in the translation direction is the same as that of the traditional 6-DOF model, but the three components in the rotational direction is divided into 6 components which are related to the inertial parameters. Based on the expression of Adams modal energy, the Matlab software is used to write the program for decoupling rate computation of the powertrain mounting system. Finally, the optimization design of the mount system is carried out by using the multi-objective optimization method. The results show that the optimization of the mount stiffness can effectively raise the decoupling rate.