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Erschienen in:
2005 | OriginalPaper | Buchkapitel
On the Role of Anisotropy in Crystalloacoustics
verfasst von : V. I. Alshits
Erschienen in: Surface Waves in Anisotropic and Laminated Bodies and Defects Detection
Verlag: Springer Netherlands
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The paper presents a short review of some basic theoretical results in the acoustics of anisotropic media. It includes: the general theorems related to phase speeds and polarization vectors of three bulk-wave eigen-modes in arbitrary elastic media; the topological classification of polarization singularities for plane waves; the conditions for the occurrence of the phenomenon of energy concentration; the general criteria for the existence of different classes of acoustic waves in media with surfaces and interfaces; the relations between phase, group and ray velocities of bulk and surface acoustic waves; the theory of resonant reflection/transmission of acoustic waves due to a coupling with a leaky wave branch in various structures; and some other topics. This work was supported by the Russian Foundation for Basic Research (Grant no.01-02-16228).