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Sound transmission through inhomogeneous waveguides

Peplow, A. T. LU and Finnveden, S. (2002) Twenty-Fourth International Conference on the Boundary Element Method Incorporating Meshless Solution Seminar, BEM XXIV In International Series on Advances in Boundary Elements 13. p.155-163
Abstract

A spectral element method is described which enables reduced wave equation problems defined in regular, arbitrary length regions to be solved as a set of coupled problems over neighbouring domains. A combination of trial functions are considered, namely the specific eigenfunctions of a differential operator and a set of hierarchical polynomials. The coefficients in the representation of the acoustic pressure are obtained by imposing continuity across element interfaces and including the given boundary conditions. The former is satisfied implicitly via a variational principle. Accurate approximations are obtained for computations of sound transmission over a step-profile and local perturbations of the ambient fluid density.

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author
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publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
Wessex Institute of Publishing
series title
International Series on Advances in Boundary Elements
volume
13
pages
9 pages
conference name
Twenty-Fourth International Conference on the Boundary Element Method Incorporating Meshless Solution Seminar, BEM XXIV
conference location
Sintra, Portugal
conference dates
2002-06-17 - 2002-06-19
external identifiers
  • scopus:2942741019
ISSN
1460-1419
language
English
LU publication?
no
id
7dcb1f5f-aca1-4032-a44e-b189f005e992
date added to LUP
2021-02-15 20:01:17
date last changed
2021-03-31 11:30:10
@inproceedings{7dcb1f5f-aca1-4032-a44e-b189f005e992,
  abstract     = {<p>A spectral element method is described which enables reduced wave equation problems defined in regular, arbitrary length regions to be solved as a set of coupled problems over neighbouring domains. A combination of trial functions are considered, namely the specific eigenfunctions of a differential operator and a set of hierarchical polynomials. The coefficients in the representation of the acoustic pressure are obtained by imposing continuity across element interfaces and including the given boundary conditions. The former is satisfied implicitly via a variational principle. Accurate approximations are obtained for computations of sound transmission over a step-profile and local perturbations of the ambient fluid density.</p>},
  author       = {Peplow, A. T. and Finnveden, S.},
  booktitle    = {Wessex Institute of Publishing},
  issn         = {1460-1419},
  language     = {eng},
  pages        = {155--163},
  series       = {International Series on Advances in Boundary Elements},
  title        = {Sound transmission through inhomogeneous waveguides},
  volume       = {13},
  year         = {2002},
}