On the existence of high-frequency boundary resonances in layered elastic media
Author(s) -
Kirill Cherednichenko,
Shane Cooper
Publication year - 2015
Publication title -
proceedings of the royal society a mathematical physical and engineering sciences
Language(s) - English
Resource type - Journals
eISSN - 1471-2946
pISSN - 1364-5021
DOI - 10.1098/rspa.2014.0878
Subject(s) - boundary (topology) , displacement (psychology) , boundary value problem , homogeneous , mathematical analysis , physics , vibration , zero (linguistics) , domain (mathematical analysis) , spectrum (functional analysis) , mathematics , mathematical physics , geometry , quantum mechanics , psychology , linguistics , philosophy , psychotherapist , thermodynamics
We analyse the asymptotic behaviour of high-frequency vibrations of a three-dimensional layered elastic medium occupying the domain Ω=(−a,a)3, a>0. We show that in both cases of stress-free and zero-displacement boundary conditions on the boundary of Ω a version of the boundary spectrum, introduced in Allaire and Conca (1998 J. Math. Pures. Appl. 77, 153–208. (doi:10.1016/S0021-7824(98)80068-8)), is non-empty and part of it is located below the Bloch spectrum. For zero-displacement boundary conditions, this yields a new type of surface wave, which is absent in the case of a homogeneous medium
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