电动车车内声学预测与优化  

Analysis and Optimization of EV Acoustic Characteristics

作　　者：朱沛英[1] ZHU Peiying

机构地区：[1]泛亚汽车技术中心有限公司,上海201208

出　　处：《上海汽车》2020年第12期33-37,47,共6页Shanghai Auto

摘　　要：随着人们生活水平的提高,顾客对汽车的振动和噪声特性提出了更高的要求。汽车车内声振水平的高低直接影响汽车乘坐舒适性,因此,在新车开发设计阶段对车身声振特性进行分析与优化具有实用价值。文章主要应用有限元分析的方法,针对设计阶段的某电动车车内低频噪声(20-200 Hz)进行了预测,利用板件声学贡献分析技术确定了对车内噪声影响较大的板件,并通过拓扑优化主要板件上的阻尼布置,取得了良好的降噪效果。With the improvement of people's living standard,customers have increasingly high demand on vehicle ride comfort.NVH performance is the important measure of vehicle comfort.It is of practical value to analyze and optimize the sound and vibration characteristics of the body in the development and design phase of a new car.In this paper,the finite element analysis method is used to predict the low frequency noise(20-200 Hz)in the design stage of an EV.By using the acoustic contribution analysis technology of panels,the panels that have a greater impact on the interior noise are determined.Through topology optimization of the damping arrangement on the main panels,good noise reduction effect is achieved.

关 键 词：声学特性 自由阻尼 拓扑优化 有限元 电动车 

分 类 号：U469.72[机械工程—车辆工程] U461.4[交通运输工程—载运工具运用工程]