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Effect of Geometry on Flexural Wave Propagation in a Notched Bar
- Authors: Agafonov A.A.1, Izosimova M.Y.1, Zhostkov R.A.2, Kokshaysky A.I.1, Korobov A.I.1, Odina N.I.1
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Affiliations:
- Lomonosov Moscow State University
- Schmidt Institute of Physics of the Earth of the Russian Academy of Sciences
- Issue: Vol 70, No 4 (2024)
- Pages: 469-477
- Section: КЛАССИЧЕСКИЕ ПРОБЛЕМЫ ЛИНЕЙНОЙ АКУСТИКИ И ТЕОРИИ ВОЛН
- URL: https://gynecology.orscience.ru/0320-7919/article/view/648378
- DOI: https://doi.org/10.31857/S0320791924040019
- EDN: https://elibrary.ru/XGABGF
- ID: 648378
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Abstract
The propagation of flexural elastic waves in notched metal bars with a rectangular cross section with the depth of notches increasing by a power law has been studied by numerical modeling and experimental laser scanning vibrometry. Three types of notch arrangement have been considered: uniform and more frequent and sparse towards the end of a bar. Such structures exhibit the characteristics of an acoustic black hole. For all the studied samples, in the 10–100 kHz frequency range, an increase in amplitude and decrease in length of the flexural wave have been experimentally found as a wave approaches the end of a bar. It has been shown that there is a critical frequency, above which the modes exhibit a section with highly reduced amplitude of oscillations.
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About the authors
A. A. Agafonov
Lomonosov Moscow State University
Email: aikor42@mail.ru
Russian Federation, Moscow
M. Yu. Izosimova
Lomonosov Moscow State University
Email: aikor42@mail.ru
Russian Federation, Moscow
R. A. Zhostkov
Schmidt Institute of Physics of the Earth of the Russian Academy of Sciences
Email: aikor42@mail.ru
Russian Federation, Moscow
A. I. Kokshaysky
Lomonosov Moscow State University
Email: aikor42@mail.ru
Russian Federation, Moscow
A. I. Korobov
Lomonosov Moscow State University
Author for correspondence.
Email: aikor42@mail.ru
Russian Federation, Moscow
N. I. Odina
Lomonosov Moscow State University
Email: aikor42@mail.ru
Russian Federation, Moscow
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