Sound transmission of an active acoustic structure with porous materials based on the （u,p） formulation

• 作者: C. Batifol CHEN Ke＇an HU Ying M. A. Galland
• 来源期刊: 声学学报：英文版
• 学科: 工学
• 关键词: 有源声学结构 多孔材料 声学性能 结构基础 声音传输 共振频率 有限元方法 结构性能
• 年，卷（期）: 2012,（1）
• 页码范围: 1-17
• 页数: 17页
• 分类号: TB535|TF125.6
• 语种: 英文

摘要

A method based on the combination of the （u,p） formulation and finite element method was applied to calcu~ati~g the acoust~cM performance of a double-wall active acoustic structure with porous materials. The （u, p） formulation based on the displacement in solid phase and the pressure in fluid phase was developed to investigate the sound propagation in porous materials. The acoustic performance of the double-wM1 active acoustic structure having porous materials was calculated and the measurement was taken. The numerical results matched well with the measured data. More than 10 dB transmission loss of the double-wall active acoustic structure can be improved in the resonance frequency with active control, and its absorption coefficient is up to 0.6 over 500 Hz. The relative error between the prediction and measurement is less than 5% at the resonance frequency of the porous materials.