基于模态分析法的车身NVH结构灵敏度分析

J4 ›› 2008, Vol. 19 ›› Issue (3): 361-364.

基于模态分析法的车身NVH结构灵敏度分析

杨搏;朱平;余海东;韩旭

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2008-02-10 发布日期:2008-02-10

Auto-body NVH Structure Sensitivity Analysis Based on Modal Analysis Method

Yang Bo;Zhu Ping;Yu Haidong;Han Xu

Received:1900-01-01 Revised:1900-01-01 Online:2008-02-10 Published:2008-02-10

摘要/Abstract

摘要：

以某SUV车为例，建立了车身及乘客室声腔的有限元模型。采用模态分析法，根据轿车车身结构和乘客室的声固耦合效应，通过模态分析得到车身结构和室内声腔的各阶耦合振动模式，通过声压响应分析得到车内噪声级别，通过结构灵敏度分析识别出车内噪声的主要来源。针对噪声源提出的改进措施有效降低了车内噪声。

关键词: 轿车车身;模态分析法;耦合分析;结构灵敏度分析

Abstract:

A SUV auto-body noise,vibration,and harshness(NVH) structure sensitivity was analysed,considering the structure-acoustic coupling based on the modal analysis method.The structure and acoustic vibration mode were gained from coupling analysis while inner noise level from frequency analysis.The given methods reduce noise by identifying the main source to the noise through structure sensitivity analysis.

Key words: auto-body;modal analysis method;coupling analysis;structure sensitivity analysis

中图分类号:

U4674

杨搏;朱平;余海东;韩旭. 基于模态分析法的车身NVH结构灵敏度分析[J]. J4, 2008, 19(3): 361-364.

Yang Bo;Zhu Ping;Yu Haidong;Han Xu. Auto-body NVH Structure Sensitivity Analysis Based on Modal Analysis Method[J]. J4, 2008, 19(3): 361-364.