基于结构与声场耦合模态分析的车内噪声控制方法

在汽车车内结构噪声的控制中，传统的结构振动模态分析不能准确地反映车身结构与车内声场的耦合特性，将车身结构与车内声场综合起来考虑，采用结构与声场耦合模态分析方法研究了汽车车内结构噪声的控制问题。在介绍结构与声场耦合模态分析方法理论的基础上，讨论了该方法在车内结构噪声控制中的工程实现。该方法在某车车内噪声控制的应用中取得了明显的降噪效果，证明了该方法的可行性和有效性。

Acoustic-Structural Coupled Modal Analysis Method and It s Application in Vehicle Interior Noise Control

Without consideration of acoustic-structural coupled factors in conventional modal analysis method for the control of vehicle interior noise generated by vibration of vehicle body, this paper presents acoustic-structural coupled modal analysis method to investigate control algorithm of vehicle interior noise. Using this method, both vehicle body structures and interior sound field could be synthetically analyzed. On the basis of the theory on acoustic-structural coupled modal analysis, emphases are put on discussion of realization of acoustic-structural coupled modal analysis method in vehicle interior noise control. The experimental results demonstrate that the method of acoustic-structural coupled modal analysis is feasible and effective in vehicle interior noise control.