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Boundary Element Analysis of Low Frequency Cavity Acoustical Problems

โœ Scribed by K.A. Hussain; K.S. Peat

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
389 KB
Volume
169
Category
Article
ISSN
0022-460X

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โœฆ Synopsis

The conventional boundary element method of analysis of noise problems inside cavities is inherently inaccurate at very low frequencies. This paper presents a new low frequency boundary element formulation, based upon a series solution in terms of the wavenumber. The new formulation gives accurate results and generally requires only a single point quadrature scheme. Furthermore, the wavenumber is decoupled from the boundary integrals, so that only one matrix assembly and solution is needed for the entire frequency range of analysis, which gives significant computational benefit as compared to the conventional boundary element method.

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An efficient indirect boundary element solution procedure for the analysis of multi-frequency acoustic problems is developed by incorporating techniques that improve the efficiency of the integration and matrix solution phases of the computing process. The integration phase is made efficient by comp