用多孔衬里穿孔夹层结构改善双层板的低频传声损失

doi:10.16553/j.cnki.issn1000-985x.2024.0226

摘要/Abstract

摘要： 针对双板结构在质量-空气-质量共振频率处隔声性能不足的问题,设计了一种由内含多孔衬里的穿孔夹层板与均质板组成的双层板型声学超材料,并采用有限元法计算了结构的法向传声损失。结果表明,当多孔衬里穿孔夹层板的谐振频率被调谐到双层板的共振频率时,结构在高频范围保持传统双板结构优异隔声性能的同时,明显改善了由质量-空气-质量共振引起的传声损失下降。通过对比穿孔夹层板与无孔夹层板的吸声系数和传声损失,发现双层板型声学超材料优异的传声损失来源于穿孔夹层板的吸声性能,并通过改变吸声频率、吸声特性对此做了进一步验证。

关键词: 声学超材料; 双层板; 夹层结构; 低频隔声; 传声损失; 有限元法

Abstract: To improve the insufficient sound insulation performance of double-layer panel structures at the mass-air-mass resonance frequency, a double-layer panel acoustic metamaterial consisting of a perforated sandwich plate with a porous liner and a homogeneous plate was designed, and the normal sound transmission loss of the structure was calculated by the finite element method. The numerical results show that when the frequency of the perforated sandwich panel with porous lining is tuned to the resonance frequency of the double-layer panel panel, the reduction of the sound transmission loss caused by mass-air-mass resonance is significantly improved. At the same time, the excellent acoustic isolation performance of the conventional double-layer panel structure is maintained at high frequencies. By comparing the sound absorption coefficient and sound transmission loss of perforated sandwich panels and unperforated sandwich panels, it is found that the excellent sound transmission loss of the double-layer panel acoustic metamaterials is attributed to the sound absorption characteristics of the perforated sandwich panels, which is further verified by changing the frequency of the acoustic absorption and the acoustic properties.

Key words: acoustic metamaterial; double-layer panel; sandwich structure; low-frequency sound insulation; sound transmission loss; finite element method

中图分类号:

TB53

李雯婧, 田俊红, 李仁生, 李佳宁, 孙小伟. 用多孔衬里穿孔夹层结构改善双层板的低频传声损失[J]. 人工晶体学报, 2025, 54(4): 581-588.

LI Wenjing, TIAN Junhong, LI Rensheng, LI Jianing, SUN Xiaowei. Improving Low-Frequency Sound Transmission Loss of Double-Layer Panels with a Perforated Sandwich Structure with Porous Lining[J]. Journal of Synthetic Crystals, 2025, 54(4): 581-588.

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