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- W2057207007 abstract "This paper based on early works concerning the acoustic resonant scattering theory (RST), deals with the multichannel resonant scattering theory (MRST) applied to the problem of acoustic waves interacting at normal incidence with an infinite fluid cylinder included in an elastic medium. At first, the two-channel longitudinal (L)–transversal (T) scattering S matrix is built up, for a given mode n, from the separate problems of the scattering by an incident cylindrical longitudinal wave on the one hand, and the scattering by an incident transversal wave on the other hand. The isolation of the resonances of the fluid cylinder is performed via the exact factorization of S as the product of the soft background scattering matrix and the resonant scattering matrix. The term “exact” means that this operation perfectly uncouples the resonances of the fluid cylinder from other scattered contributions, isolating their energy into a single eigenchannel obtained from the diagonalization of the resonant scattering matrix. It will be shown that the strong point of the MRST formalism is the calculation of the resonant energy over the longitudinal and shear scattering channels in relation with the density matrix. A connection is made through the coupling parameters, the zeros and the poles of the resonant scattering matrix. The asymptotic behaviors of the resonant scattering matrix and the coupling parameters are also investigated with regard to the frequency." @default.
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- W2057207007 date "2004-09-01" @default.
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- W2057207007 title "Multichannel resonant scattering theory applied to a fluid-filled cylindrical cavity in an elastic medium" @default.
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- W2057207007 doi "https://doi.org/10.1016/j.wavemoti.2004.05.001" @default.
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