Determination of the cutoff frequency of an acoustic circumferential wave using a time–frequency analysis
Identifieur interne : 001105 ( France/Analysis ); précédent : 001104; suivant : 001106Determination of the cutoff frequency of an acoustic circumferential wave using a time–frequency analysis
Auteurs : R. Latif [Maroc] ; E. Aassif [Maroc] ; A. Moudden [Maroc] ; D. Decultot [France] ; B. Faiz [Maroc] ; G. Maze [France]Source :
- NDT and E International [ 0963-8695 ] ; 2000.
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Abstract
In this article, time–frequency representation of Wigner–Ville is used to analyse the acoustic signal backscattered by a thin elastic tube of radii ratio b/a. This analysis allows to determine the reduced cutoff frequency of the circumferential antisymmetric wave A1 propagating around the tube. The evolution of this reduced cutoff frequency in function of b/a is reported. The values obtained of reduced cutoff frequency are compared to the values computed from the proper modes method.
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DOI: 10.1016/S0963-8695(00)00003-7
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