A super-spectral finite element method for sound transmission in waveguides
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
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.
trapped modes, vibration
Engineering and Technology
IdentifiersURN: urn:nbn:se:kth:diva-23722DOI: 10.1121/1.1777853ISI: 000223836600009ScopusID: 2-s2.0-4444327550OAI: oai:DiVA.org:kth-23722DiVA: diva2:342421
QC 201109232010-08-102010-08-102016-05-11Bibliographically approved