L型分割背腔的微穿孔板吸声结构的吸声性能研究

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振动与冲击 ›› 2018, Vol. 37 ›› Issue (16) : 256-260.

论文

盖晓玲1，李贤徽1，邢拓1，张斌1，蔡泽农1，王芳1，韩钰2

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Sound absorption of a microperforated panel backed by an L-type division cavity

GAI Xiaoling1, LI Xianhui1, XING Tuo1, ZHANG Bin1, CAI Zenong1, WANG Fang1, HAN Yu2

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文章历史 +

摘要

为了提高单层微穿孔板吸声结构的低频吸声性能，设计了一种L型分割背腔的微穿孔板吸声结构。基于微穿孔板吸声理论和声电等效电路原理，建立了两腔分割的L型分割背腔的微穿孔板吸声结构的声电等效电路模型。数值和实验结果表明：L型分割背腔的微穿孔板吸声结构能很好的改善单层微穿孔板结构低频吸声性能，并且明显拓宽了单层微穿孔板结构的吸声带宽。将此结构推广到N腔分割，实验结果和数值结果拟合的较好。

Abstract

To improve the sound absorption ability of a single-layer microperforated panel (MPP), an MPP backed by an L-type division cavity was designed.Based on the MPP theory and electro-acoustical equivalent circuit principle, the sound absorption model of a microperforated panel backed by a two-cavity L-type division cavity was built.Simulation and experiment results show that that an MPP with a designed cavity structure has better sound absorption performance and a broader absorption bandwidth than an MPP with a single-cavity structure.This structure is extended to N-cavity segmentation.The experimental results are in agreement with the numerical results.

导出引用

盖晓玲1，李贤徽1，邢拓1，张斌1，蔡泽农1，王芳1，韩钰2. L型分割背腔的微穿孔板吸声结构的吸声性能研究[J]. 振动与冲击, 2018, 37(16): 256-260

GAI Xiaoling1, LI Xianhui1, XING Tuo1, ZHANG Bin1, CAI Zenong1, WANG Fang1, HAN Yu2. Sound absorption of a microperforated panel backed by an L-type division cavity[J]. Journal of Vibration and Shock, 2018, 37(16): 256-260

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