摘要
The structure and the acoustic medium of a passenger vehicle are modeled using the finite element method(FEM), and the interior noise is studied the help of the modal synthesis method (MSM). Sound pressure level (Lp) of the noise is calculated in several conditions of the models, and has good agreements with its test results. The MSM am be consequently used for predicting the vehicle interior noise in dssign stage so that the structure may be optimized for the Purpose of the most reduction of noise.
首先建立了壳体结构和声场的有限元模型，用声场－结构耦合的模态综合法分析了车内噪声的分布，并计算了车辆在几种工况下的声压级，与模型实验结果趋势一致．因此，声场－结构耦合的模态综合法可以较有效地预估车内的噪声，可以在设计阶段优化车辆壳体结构，从而使车内噪声尽可能降到最低限度．
