汽车动力总成悬置系统固有特性的可靠性优化  

Reliability Optimization on the Natural Characteristics of Vehicle Powertrain Mounting System

作　　者：吴杰[1,2] 郝世武[1] 

机构地区：[1]华南理工大学机械与汽车工程学院,广州510641 [2]广东省汽车工程重点实验室,广州510641

出　　处：《汽车工程》2013年第9期841-846,共6页Automotive Engineering

基　　金：国家863计划项目(2012AA110702);教育部新世纪人才计划项目(NCET-11-0157);华南理工大学中央高校基本科研业务费专项(x2jqD2115540)资助

摘　　要：以悬置刚度为设计变量,分别用正态分布和均匀分布随机变量描述设计变量和动力总成惯性参数的不确定性,建立了悬置系统固有特性的可靠性优化模型,对某轿车悬置系统固有特性分别进行了确定性优化和可靠性优化。结果表明:与确定性优化方法相比,采用可靠性优化方法虽然悬置系统在各方向的解耦率稍有降低,但可较大幅度地提高解耦布置和频率配置的可靠性。Taking the mount stiffness as design variables with the uncertainty of design variables and inertia parameters of powertrain described by both normally and uniformly distributed random variables respectively, a relia- bility optimization model for the natural characteristics of mounting system is established and both certainty optimiza- tion and reliability optimization are conducted respectively on the natural characteristics of a car powertrain mounting system. The results show that compared with certainty optimization, using reliability optimization though slightly low- ers the decoupling rates in all directions of mounting system but can significantly enhance its reliability of decoupling layout and frequency allocation.

关 键 词：动力总成悬置系统 固有频率 解耦率 可靠性优化 

分 类 号：U463.33[机械工程—车辆工程]