Acoustic attenuation analysis of silencers with multi-chamber by using coupling method based on subdomain division technique

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• 作者：Z. Fang^a ; ^{zihuiying@163.com" class="auth_mail" title="E-mail the corresponding author} ; Z.L. Ji^b ; C.Y. Liu^c
• 关键词：Coupling method ; Subdomain division technique ; Numerical mode matching method ; Impedance matrix ; Multi-chamber silencer
• 刊名：Applied Acoustics
• 出版年：2017
• 出版时间：15 January 2017
• 年：2017
• 卷：116
• 期：Complete
• 页码：152-163
• 全文大小：2071 K

文摘

For multi-chamber silencers with non-uniform cross-sections at axial direction, the coupling method based on subdomain division technique is proposed. The silencer is divided into several subdomains which impedance matrixes are calculated by using suitable 3-D methods. Combining with the continuity conditions at the interfaces to solve the integral impedance matrix of the silencer, thereby the transmission loss is derived. For the double-chamber silencers, the transmission loss and computational speed results from the proposed method, the numerical mode matching (NMM) method, 3-D finite element (FE) method predictions and experimental measurements are compared, which verifies the accuracy and efficiency.