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Titolo:
Determination of the group and phase velocities from time-frequency representation of Wigner-Ville
Autore:
Latif, R; Aassif, EH; Maze, G; Moudden, A; Faiz, B;
Indirizzi:
Univ Ibn Zohr, Fac Sci, Lab Instrumentat & Mesures, Agadir 80000, Morocco Univ Ibn Zohr Agadir Morocco 80000 ntat & Mesures, Agadir 80000, Morocco Univ Havre, Acoust Ultrasonore & Elect Lab, CNRS, URA 1373, F-76610 Le Havre, France Univ Havre Le Havre France F-76610 S, URA 1373, F-76610 Le Havre, France
Titolo Testata:
NDT & E INTERNATIONAL
fascicolo: 7, volume: 32, anno: 1999,
pagine: 415 - 422
SICI:
0963-8695(199910)32:7<415:DOTGAP>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Keywords:
acoustic response; submerged elastic shell; scattering waves; circumferential waves; time-frequency; Wigner-Ville; group velocity; phase velocity;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
8
Recensione:
Indirizzi per estratti:
Indirizzo: Latif, R Univ Ibn Zohr, Fac Sci, Lab Instrumentat & Mesures, BP 28-S, Agadir 80000,Morocco Univ Ibn Zohr BP 28-S Agadir Morocco 80000 Agadir 80000,Morocco
Citazione:
R. Latif et al., "Determination of the group and phase velocities from time-frequency representation of Wigner-Ville", NDT E INT, 32(7), 1999, pp. 415-422

Abstract

The experimental measurement of the group and phase velocities of some circumferential waves propagating around a thin elastic tube is a still complex operation. In this study, we show that the dispersion velocity can be determined from a time-frequency representation. We use the Wigner-Ville method by virtue of its interesting properties. On some time-frequency images, the symmetric (S0) and antisymmetric (A1) circumferential waves are identified. The group velocity dispersion estimated from these images is compared with that computed by the proper mode theory method. A good agreement is obtained. The phase velocity is also determined from the group velocity. (C) 1999 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/03/20 alle ore 10:56:16