A substructure boundary element method for packed silencers

T. W. Wu, G. Lou, C. Y.R. Cheng

Research output: Contribution to journalConference articlepeer-review


Substructuring has been a classical technique in structural FEM analysis to reduce the matrix size and the computation time. In this paper, a substructuring technique based on the impedance matrix synthesis is used along with the recently developed direct mixed-body BEM to evaluate the transmission loss (TL) of packed silencers. Due to the single-domain nature of the direct mixed-body BEM, each substructure does not need to be a homogeneous domain. Complex internal components such as extended inlet/outlet tubes, perforated tubes, and thin baffles, as well as bulk-reacting linings, can all be in one single substructure. As such, dividing a large silencer into modular substructures can be done naturally in the longitudinal direction. The substructuring technique presented in this paper also has the capability of modeling a catalytic converter in which a catalytic monolith containing a stack of capillary tubes is inserted between two connecting substructures. A parallel-baffle silencer is presented to demonstrate the technique.

Original languageEnglish
Pages (from-to)253-262
Number of pages10
JournalInternational Series on Advances in Boundary Elements
StatePublished - 2003
EventTwenty-Fifth International Conference on the Boundary Element Method, BEM XXV - Split, Croatia
Duration: Sep 8 2003Sep 10 2003

ASJC Scopus subject areas

  • General Engineering


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