轿车动力总成悬置系统匹配设计方案优选与分析方法  

Optimal Matching Designs Selection and Analysis of Mounting System for Car Power-train

作　　者：顾名坤[1] 吕振华[1] 王亚楠[1] 

机构地区：[1]清华大学汽车工程系,汽车安全与节能国家重点实验室,北京100084

出　　处：《汽车工程》2011年第7期574-580,597,共8页Automotive Engineering

基　　金：国家“863计划”项目“X121轿车集成开发先进技术”(2006AA110103)之子项目“轿车振动特性和碰撞安全性CAE关键技术研究”;北京市科技计划项目“北京牌轿车关键技术研究”的“轿车振动噪声分析与控制技术研究”课题(D08010400250804)资助

摘　　要：本文中对一种带一个抗侧倾控制臂三点式轿车动力总成悬置系统进行振动特性的分析及其匹配设计的研究。对其7自由度振动模型的固有振动特性分析结果表明,第7阶振动模态对悬置系统传递的动态力影响很小,故在进行此类悬置系统的匹配设计时,一般可不考虑频率相对很高的第7阶振动模态。采用一种简明、实用的多方案设计优选方法,较快地得出了振动模态频率配置合理、主要模态振动的多自由度解耦率高的悬置系统匹配设计方案,通过其受迫振动分析验证了优选悬置系统隔振性能的改进效果。In this paper,an analysis on the vibration characteristics and a study on the matching design of a kind of mounting system with an antiroll control arm for car powertrain are conducted.The results of natural vibration characteristics analysis on its 7 DOF model show that the 7th order vibration mode only has a little effect on the dynamic force transmitted through mounting system,so the 7th order vibration mode with relatively high frequency can,in general,be ignored.By adopting a concise and pragmatic optimum seeking method for multivariate design,a matching design scheme of mounting system with rational allocation of modal frequencies and high decoupling rates of key vibration modes is rather quickly obtained.The effects of optimized mounting system in improving vibration isolation are verified by forced vibration analysis.

关 键 词：动力总成隔振 悬置系统匹配设计 模态频率配置 模态振动解耦 

分 类 号：U463.33[机械工程—车辆工程]