汽车动力总成悬置系统的解耦优化研究及应用  

Decoupling Optimization Research and Application of Automobile Powertrain Mounting System

作　　者：孙永厚[1] 李峤[1] 刘夫云[1] 伍建伟[1] 

机构地区：[1]桂林电子科技大学机电工程学院,广西桂林541004

出　　处：《机械设计与制造》2016年第9期147-149,154,共4页Machinery Design & Manufacture

基　　金：国家自然科学基金项目(51265006);广西科技开发项目(桂科攻1348005-11);柳州市科学研究与技术开发项目(2013H020401);桂林电子科技大学研究生教育创新计划资助项目(GDYCSZ201442)

摘　　要：汽车动力总成悬置系统(Powertrain Mounting System,简称PMS)的设计好坏直接影响整车的NVH(噪声、振动和声振粗糙度)性能。针对某企业新车型研发的实际需求,对悬置系统进行解耦优化设计。首先建立悬置系统模型,得到系统固有特性一般方程式;再以MATLAB为开发平台,运用能量法编写优化程序,对悬置软垫三个主轴方向的刚度、位置和角度(也称悬置倾角)均进行了优化;最后将优化前后结果进行对比分析,并通过ADAMS软件验证。由分析结果可知,经优化过的固有频率分布较为合理,系统在六个激励振动方向的解耦率、固有频率最大最小值、频率差均满足企业的高标准要求,对动力总成悬置系统的设计具有一定的参考价值。Automotive Powertrain Mounting System （short for PMS）is vibration isolation system between the engine-mounting and car-body, and design pe^fornmnce of automotive Powertrain Mounting System will influence the NVH （Noise, Vibration and Harshness ）of the vehicle straightly. According to the actual needs of the development of the new car-model of a company, at first, rubber mounting system model is established and the general equation solving the inherent characteristics of the elastic axis mounting system is obtained then with MATLAB as a development platform, the decoupled optimization program is written using energy method and the stiffness, and the position and angle of suspension element in three axis direction is optimized. Finally, and the results are compared before and after optimization and verified by ADAMS software. It is shown that the optimized suspension system natural frequency distribution is reasonable, the decoupling rate, the maximum minimum natural frequency, frequency difference of the system can satisfy the enterprise requirements in the direction of the six rigid-body motion of vibration decoupling rate. It provides a valuable reference for the proper design of automotive elastic axis mounting of engine-mounting.

关 键 词：动力总成 悬置系统 解耦优化 MATLAB 悬置刚度 位置和角度 

分 类 号：TH16[机械工程—机械制造及自动化] TP301.6[自动化与计算机技术—计算机系统结构]