Author(s)

ang Yang & Zhenlin Ji

Abstract

Substructure boundary element method, direct mixed-body boundary element method, and substructure direct mixed-body BEM are used to calculate the acoustic attenuation characteristics of silencers with perforated facing. The transmission loss predictions of straight-through perforated tube silencers by the three approaches agree well with experimental measurements in the literature. The computational efficiency is compared in the paper which shows that the substructure direct mixed-body BEM can save a large amount of computation time for the large muffler contains complex internal geometry. Test case of a hybrid expansion chamber silencer with perforated facing is analyzed in the paper. Keywords: boundary element method, substructure approach, direct mixedbody BEM, perforated silencers, computational efficiency.

Keywords

boundary element method, substructure approach, direct mixedbody BEM, perforated silencers, computational efficiency