Acoustic analysis of anisotropic poroelastic multilayered systems

The proposed method allows for an extended analysis of the wave analysis, internal powers, and acoustic performance of anisotropic poroelastic media within semi-infinite multilayered systems under arbitrary excitation. Based on a plane wave expansion, the solution is derived from a first order parti...

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Bibliographic Details
Published in:Journal of applied physics 2016-02, Vol.119 (8), p.084907
Main Authors: Parra Martinez, Juan Pablo, Dazel, Olivier, Göransson, Peter, Cuenca, Jacques
Format: Article
Language:English
Subjects:
acoustic
Acoustic properties
acoustic waves
Acoustics
Anisotropy
Applied physics
Farkostteknik
Frequency shift
Materials Science and Engineering
mechanical waves
Mechanics
Physics
Plane waves
poroelastic materials
porous materials
Teknisk materialvetenskap
Vehicle and Maritime Engineering
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Summary:The proposed method allows for an extended analysis of the wave analysis, internal powers, and acoustic performance of anisotropic poroelastic media within semi-infinite multilayered systems under arbitrary excitation. Based on a plane wave expansion, the solution is derived from a first order partial derivative as proposed by Stroh. This allows for an in-depth analysis of the mechanisms controlling the acoustic behaviour in terms of internal powers and wave properties in the media. In particular, the proposed approach is used to highlight the influence of the phenomena intrinsic to anisotropic poroelastic media, such as compression-shear coupling related to the material alignment, the frequency shift of the fundamental resonance, or the appearance of particular geometrical coincidences in multilayered systems with such materials.
ISSN:0021-8979
1089-7550
1089-7550
DOI:10.1063/1.4942443