通过建立车身的声固耦合有限元模型，分析了车身在低频段的声压频响函数，截取了20~200Hz范围内的4个主要峰值频率以分析壁板贡献度；对车身地板的阻尼材料敷设位置进行优化，并以阻尼材料的厚度为设计变量，以阻尼材料的总质量最小为目标，将 Kriging近似建模技术与粒子群算法相结合对车身地板的阻尼材料敷设厚度进行优化，提出了一种基于壁板贡献度的分析方法和基于改进的粒子群优化算法的车内阻尼材料布置优化方法.结果表明，在保证车内峰值声压不增大的情况下，采用所提优化方法能够达到阻尼材料质量降低52.0%的效果，并通过简易车身装置的实验验证了优化方法的有效性.
In order to consider the vehicle interior noise reduction, a finite element method (FEM) model was established for a simple car. Sound pressure level (SPL) frequency response function was analyzed at low frequency phase. Four main peak frequencies in the range of 20Hz to 200Hz and those body panels contributions were focused. The layout of the damping materials was optimized. With the objective of minimizing the mass of damping material, and variables of the thickness of damping materials, by using Kriging metamodeling technique and particle swarm optimization (PSO), optimization method of damping configuration was proposed based on panel contribution. The mass of damping materials was reduced by 52.0% under the requirement that the SPL of peak frequencies did not increase, and the experiment was done to verify the effectiveness of the method.
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