基于COMSOL的空腔声学覆盖层的斜入射吸声性能分析

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振动与冲击 ›› 2019, Vol. 38 ›› Issue (12) : 213-218.

论文

叶韩峰，陶猛，李俊杰

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Sound absorption performance analysis of anechoic coatings under oblique incidence condition based on COMSOL

YE Hanfeng,TAO Meng,LI Junjie

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文章历史 +

摘要

基于平面波斜入射理论，利用有限元软件COMSOL建立了双层平板空腔声学覆盖层单元的斜入射仿真模型，并研究了斜入射条件下覆盖层结构和材料参数对其吸声性能的影响。首先，通过与理论解的对比，验证了该仿真模型的准确性；然后，讨论了入射角度，空腔结构，穿孔率和覆盖层厚度等参数变化对于覆盖层吸声性能的影响。结果表明：当入射角度变化时，吸声系数的峰值谷值间的频率间隔会随着入射角度的增加而增大，而且峰值和谷值也会随着入射角度的增加而增大；当穿孔率较大或者覆盖层厚度较厚时，吸声系数的峰值和谷值频率值会向低频移动，且数值也会更大。

Abstract

Based on the oblique incidence theory of plane wave, a simulation model of the anechoic coating with double plates has been established using the FEM software COMSOL.The influence of structural and material parameters under oblique incidence condition on sound absorption performance has been studied.Firstly, the accuracy of this model has been validated via the comparison between the FEM and the theoretical results.Then, the influence of incidence angles, hole structures, perforating rates, and thickness on sound absorption performance of anechoic coatings has been studied.The results show: If incidence angles increase, the frequency space between the peak and trough of sound absorption coefficient curves and the associated numerical values will increase.The frequency values at peaks and troughs of sound absorption coefficient curves are higher and the curves will shift to left as the perforating rate and the thickness increase.

导出引用

叶韩峰，陶猛，李俊杰. 基于COMSOL的空腔声学覆盖层的斜入射吸声性能分析[J]. 振动与冲击, 2019, 38(12): 213-218

YE Hanfeng,TAO Meng,LI Junjie. Sound absorption performance analysis of anechoic coatings under oblique incidence condition based on COMSOL[J]. Journal of Vibration and Shock, 2019, 38(12): 213-218

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