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Peculiarities of flexural wave propagation in a notched bar
- Authors: Agafonov A.A.1, Izosimova M.Y.1, Zhostkov R.A.2, Kokshayskiy A.I.1, Korobov A.I.1, Odina N.I.1
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Affiliations:
- Moscow State University named after M.V. Lomonosov
- Institute of Physics of the Earth named after O.Yu. Schmidt RAS
- Issue: Vol 70, No 3 (2024)
- Pages: 3-12
- Section: КЛАССИЧЕСКИЕ ПРОБЛЕМЫ ЛИНЕЙНОЙ АКУСТИКИ И ТЕОРИИ ВОЛН
- URL: https://ruspoj.com/0320-7919/article/view/648371
- DOI: https://doi.org/10.31857/S0320791924030019
- EDN: https://elibrary.ru/ZNMUGZ
- ID: 648371
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Abstract
The results of numerical modeling and experimental studies of the propagation of flexural elastic waves in a metal notched bar approximates the effect of an acoustic black hole are presented. The sample is a bar with notches, the depth of which increases according to the power law with an exponent equal to (4/3). It has been confirmed experimentally and with the simulation results, that such bars slow down the propagation of an elastic wave to the end of the bar. It is shown in such structures flexural waves have dispersion and their localization at the end of the bar is higher for some natural frequencies than that of a solid rod. The natural oscillations of the whole and notched bars are compared, i.e. the shape of the amplitude of the flexural wave along the rods. The dependence of the flexural wave length in a notched bar on the frequency is investigated as a wave propagates to the end of the bar.
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About the authors
A. A. Agafonov
Moscow State University named after M.V. Lomonosov
Email: aikor42@mail.ru
Faculty of Physics
Russian Federation, Leninskie Gory, Moscow, 119991M. Yu. Izosimova
Moscow State University named after M.V. Lomonosov
Email: aikor42@mail.ru
Faculty of Physics
Russian Federation, Leninskie Gory, Moscow, 119991R. A. Zhostkov
Institute of Physics of the Earth named after O.Yu. Schmidt RAS
Email: aikor42@mail.ru
Russian Federation, Gruzinskaya st. 10, building 1, Moscow, 123995
A. I. Kokshayskiy
Moscow State University named after M.V. Lomonosov
Email: aikor42@mail.ru
Faculty of Physics
Russian Federation, Leninskie Gory, Moscow, 119991A. I. Korobov
Moscow State University named after M.V. Lomonosov
Author for correspondence.
Email: aikor42@mail.ru
Faculty of Physics
Russian Federation, Leninskie Gory, Moscow, 119991
N. I. Odina
Moscow State University named after M.V. Lomonosov
Email: aikor42@mail.ru
Faculty of Physics
Russian Federation, Leninskie Gory, Moscow, 119991References
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