Acoustic black hole for Lamb fundamental flexural mode

The conditions for appearing acoustic black holes (ABH) related to the propagation of flexural Lamb waves in three-layered plates are analyzed. It is revealed that with acoustically soft external layers compared to the core layer, the phase velocity and propagation velocity can be made arbitrary low...

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Bibliographic Details
Published in:European physical journal plus 2023-03, Vol.138 (3), p.197, Article 197
Main Author: Kuznetsov, S. V.
Format: Article
Language:English
Subjects:
Acoustics
Applied and Technical Physics
Atomic
Boundary conditions
Complex Systems
Condensed Matter Physics
Energy
Lamb waves
Mathematical and Computational Physics
Matrix methods
Molecular
Optical and Plasma Physics
Phase velocity
Physics
Physics and Astronomy
Propagation
Propagation velocity
Regular Article
Theoretical
Velocity
Wave power
Wave propagation
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Summary:The conditions for appearing acoustic black holes (ABH) related to the propagation of flexural Lamb waves in three-layered plates are analyzed. It is revealed that with acoustically soft external layers compared to the core layer, the phase velocity and propagation velocity can be made arbitrary low, thereby providing an approach to the perfect ABH. The analysis is based on a combination of modified Cauchy sextic formalism and the exponential fundamental matrix method.
ISSN:2190-5444
2190-5444
DOI:10.1140/epjp/s13360-023-03849-x