Wave propagation in immersed waveguide with radial inhomogeneity.
Cylinder
Forced oscillations
Fourier transform
Inhomogeneity
Residue theory
Wave propagation
Waveguide
Journal
Ultrasonics
ISSN: 1874-9968
Titre abrégé: Ultrasonics
Pays: Netherlands
ID NLM: 0050452
Informations de publication
Date de publication:
Dec 2020
Dec 2020
Historique:
received:
25
09
2019
revised:
25
03
2020
accepted:
08
05
2020
pubmed:
26
6
2020
medline:
26
6
2020
entrez:
26
6
2020
Statut:
ppublish
Résumé
In this paper, we investigate wave propagation in an inhomogeneous cylindrical waveguide immersed in a medium. To model external medium influence, we use the impedance boundary conditions on the waveguide outer wall. Some structural properties of the dispersion set are studied. To treat the problem of the waveguide forced oscillations, we solve boundary value problems for the first order vector differential equation sequentially in the Fourier transform space and then build the actual space on the basis of the residue theory. The residues for the numerically given function with the first order poles were found by considering auxiliary boundary value problems. The wave fields on the waveguide internal wall are obtained for different inhomogeneity laws and boundary conditions.
Identifiants
pubmed: 32585462
pii: S0041-624X(20)30112-8
doi: 10.1016/j.ultras.2020.106173
pii:
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
106173Informations de copyright
Copyright © 2020 Elsevier B.V. All rights reserved.
Déclaration de conflit d'intérêts
Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.