接头分析在汽车NVH正向设计中的应用  

The Application of Joints Analyse in the Original Design Process of Automobile NVH

作　　者：穆国宝[1] 张丰利[1] 张金姐[1] 陈剑[1] 

机构地区：[1]合肥工业大学噪声振动工程研究所,合肥230009

出　　处：《汽车科技》2009年第2期17-19,共3页Auto Sci-Tech

基　　金：国家高技术研究发展计划(863)项目(2006AA110101)

摘　　要：轿车的NVH性能在现代轿车开发中已经越来越受到重视。结合国内某轿车NVH性能开发流程,对该轿车结构设计阶段的白车身进行了模态分析和静态刚度分析。分析结果显示,一阶振型为顶棚横摆,且频率与发动机怠速激励频率接近,车身扭转刚度低于竞争车型。由此分析了A柱接头刚度,并对其进行了结构和尺寸优化以提高其刚度,达到了消除顶棚横摆模态,提高扭转刚度值的目的。Vehicle NVH performance has been more and more critical in the developing process of a passenger vehicle. In this paper,modes and stiffness are analyzed in the designing process of a domestic passenger vehicle. The results show that the first vibration type is roof transverse swing with a frequency close to the engine excitation and the stiffness value is under the BM target. The A pillar joint stiffness is also analyzed structure optimized. The results show that the BIW torsional stiffness improve with the joint＇s stiffness improves, and the roof swing disappears.

关 键 词：模态 刚度 白车身 接头 

分 类 号：U467.493[机械工程—车辆工程] TV554.14[交通运输工程—载运工具运用工程]