https://doi.org/10.1140/epjp/s13360-023-03849-x
Regular Article
Acoustic black hole for Lamb fundamental flexural mode
Moscow State University of Civil Engineering, Moscow, Russia
Received:
4
December
2022
Accepted:
26
February
2023
Published online:
3
March
2023
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.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
