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A super-spectral finite element method for sound transmission in waveguides
KTH, Superseded Departments, Vehicle Engineering.
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, MWL Structural and vibroacoustics.ORCID iD: 0000-0002-9031-3662
2004 (English)In: Journal of the Acoustical Society of America, ISSN 0001-4966, E-ISSN 1520-8524, Vol. 116, no 3, 1389-1400 p.Article in journal (Refereed) Published
Abstract [en]

A super-spectral finite element method is developed for the study of acoustical wave propagation in nonuniform waveguides. The formulation is based on a finite-element approach using a mixture of high order element shape functions and wave solutions. The numerical method provides solutions to acoustic duct or fluid waveguide environments which may be divided into rectangular sectors. Examples of its use for infinite acoustic waveguides include sound transmission through large ambient density variations and propagation over a geometric stair-step perturbation. Computation of a trapped mode waveform due to a point volume source within a uniform waveguide is also presented.

Place, publisher, year, edition, pages
2004. Vol. 116, no 3, 1389-1400 p.
Keyword [en]
trapped modes, vibration
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-23722DOI: 10.1121/1.1777853ISI: 000223836600009Scopus ID: 2-s2.0-4444327550OAI: oai:DiVA.org:kth-23722DiVA: diva2:342421
Note

QC 20110923

Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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Finnveden, Svante

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