Transmission loss prediction of silencers by using combined boundary element&nbsp; method and numerical collocation approach

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (2) : 153-157.

Transmission loss prediction of silencers by using combined boundary element method and numerical collocation approach

YANG Liang1，JI Zhen-lin1，WU T.W.2

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Abstract

A technique combining the boundary element method (BEM) and numerical collocation approach is proposed to calculate the transmission loss of silencers with arbitrary cross-section. The silencer is divided into several substructures. The BEM and the numerical collocation approach are employed to evaluate the impedance matrices of substructures with any-shaped cross-section and uniform cross-section along axial direction, respectively, and then the matrices for all substructures are related. The transmission loss predictions of several silencers agree well with BEM. The computational efficiency is analyzed and compared with traditional substructure method. The combined technique may save computational time efficiently.

Key words

silencer / transmission loss / boundary element method / numerical collocation approach

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YANG Liang1，JI Zhen-lin1，WU T.W.2. Transmission loss prediction of silencers by using combined boundary element method and numerical collocation approach[J]. Journal of Vibration and Shock, 2016, 35(2): 153-157

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