轿车车身结构噪声性能分析与优化研究  

Auto-Body Structure Noise Performance Analysis and Optimization Research

作　　者：杨搏[1] 朱平[1] 韩旭[1] 顾镭 杨晋 

机构地区：[1]上海交通大学机械与动力工程学院,上海200030 [2]奇瑞汽车有限公司汽车工程研究院,安徽241009

出　　处：《噪声与振动控制》2006年第5期74-77,共4页Noise and Vibration Control

基　　金：国家高技术研究发展计划(863)资助项目(2004AA411010)

摘　　要：随着汽车工业的发展和人们对汽车舒适性的要求越来越高,在轿车车身设计中,运用有限元法来进行结构优化以严格控制噪声性能是一种非常有效的方法。以某型SUV车为例,建立车身及乘坐室声腔的有限元模型,并与刚度实验对比验证模型的正确性,通过频率响应分析得到车内噪声等级以及噪声的频率分布特性。以车内噪声最小化为优化目标函数,车身质量为约束条件,通过车身壁板贡献度分析确定优化设计变量,进行车身关键零件的优化改进,使白车身内两个峰值噪声分别降低了5.1dB和3.6dB,为今后开展轿车车身噪声研究提供可借鉴的方法。Finite element analysis method is very effective to structure optimization for noise control in auto-body design process with the vehicle industry development and increasing request to the driving comfort. This paper creates auto-body and acoustic finite element model, which is verified by rigidity test. Frequency response analysis is then performed to get the interior noise level and frequency distributing characteristics. The optimization function is confirmed, with minimum noise as goal, auto-body weight as restriction and key panels as design variables by panel participation analysis, by which auto-body interior noise peak is reduced by 5. 1dB and 3.6dB.

关 键 词：声学 轿车车身 噪声 刚度 壁板贡献度 设计变量 优化 

分 类 号：U467.493[机械工程—车辆工程]