车内噪声控制中的结构-声场耦合模态分析方法

Application of Acoustic-Structural Coupled Modal Analysis Method in Vehicle Interior Noise Control

车内噪声中的结构噪声是由车身结构振动与车内空腔声场的耦合产生的 ,传统的振动模态分析方法在针对车内噪声控制时由于没有考虑这种耦合特性而存在很大的局限性。本文在介绍结构 -声场耦合模态分析方法的原理基础上 ,研究了该方法在车内噪声测试分析与控制中的应用与工程实现 ,并开发出了相应的测试分析系统。该系统在某车车内噪声控制中取得了明显的降噪效果。

The conventional method of modal analysis doesn't take the acoustic structural coupled factors into account for the control of vehicle interior noise generated by the interaction of structural vibration and acoustic field. Based on coupled acoustic structural modal analysis method, its application in vehicle interior noise control is studied, and corresponding experimental system is developed. The practical application of this experimental system is also introduced and the satisfied results have been achieved.