椭圆柱空腔吸声覆盖层的声学特性

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (1) : 159-163.

论文

椭圆柱空腔吸声覆盖层的声学特性

陶猛1 卓琳凯2

作者信息 +

Acoustic performance of sound absorption coatingcontaining periodic elliptic cylindrical cavities

Tao Meng 1 Zhuo Linkai 2

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文章历史 +

摘要

采用波导有限元方法（WFEM）分析了共振腔型吸声覆盖层内轴向波的传播和损耗特性，以椭圆柱空腔吸声层为例，在保持穿孔系数不变的前提下，分别从轴向波传播和波型转换的角度分析了空腔形状改变吸声覆盖层声学特性的机理。在此基础上，结合波导有限元方法和传递矩阵（TM）建立了变截面空腔吸声覆盖层的分析模型，以圆台空腔吸声层为例，与二维解析方法对比验证了WFEM-TM方法的正确性，并讨论了椭圆台空腔吸声层的声学特性。

Abstract

Using the waveguide finite element method, the propagation and the attenuation of axial wave in the sound absorption coating which contains periodic resonant cavities have been obtained. For the case of elliptic cylindrical cavity, and assuming the same perforation ratio, the effect of cavity geometry on the acoustic performance of sound absorption coating has been summarized both by the axial wave propagating characteristic and by the wave-mode transformation phenomenon respectively. The waveguide finite element method (WFEM) and the transfer method (TM) are combined to model the acoustic performance of sound absorption coating which contains periodic deformed cavities, and the WFEM-TM method has been validated by compared with the two-dimensional analytic method based on the case of periodic conical cavities. Furthermore, the acoustic performance of coating containing periodic elliptic conical cavities has been discussed.

导出引用

陶猛卓琳凯. 椭圆柱空腔吸声覆盖层的声学特性[J]. 振动与冲击, 2013, 32(1): 159-163

Tao Meng Zhuo Linkai . Acoustic performance of sound absorption coatingcontaining periodic elliptic cylindrical cavities[J]. Journal of Vibration and Shock, 2013, 32(1): 159-163