Analysis of radiative absorption of acoustic Lamb waves in plates loaded with an inviscid non-conducting fluid.

N. A. Ageikin; Агейкин Н. А.; V. I. Anisimkin; Анисимкин В. И.; N. V. Voronova; Воронова Н. В.; A. V. Smirnov; Смирнов А. В.

doi:10.31857/S0033849423100029

Analysis of radiative absorption of acoustic Lamb waves in plates loaded with an inviscid non-conducting fluid.

Authors: Ageikin N.A.¹, Anisimkin V.I.¹, Voronova N.V.², Smirnov A.V.¹
Affiliations:
1. Kotelnikov Institute of Radioengineering and Electronics, Russian Academy of Sciences
2. Scientific-Research Institute of Molecular Electronics
Issue: Vol 68, No 10 (2023)
Pages: 1030-1034
Section: ФИЗИЧЕСКИЕ ПРОЦЕССЫ В ЭЛЕКТРОННЫХ ПРИБОРАХ
URL: https://journal-vniispk.ru/0033-8494/article/view/232591
DOI: https://doi.org/10.31857/S0033849423100029
EDN: https://elibrary.ru/DOAZHJ
ID: 232591

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Abstract
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Abstract

The dependence of radiation losses into a liquid on the value of the displacement component U_3 normal to the plate on the surface of a piezoelectric plate was experimentally studied for Lamb waves of various orders. Waves whose phase velocity V_n in the plate are considered greater than the velocity of the longitudinal volumetric acoustic wave in the liquid V_l. It is shown that at small values of U3 there is no radiation into the liquid and the magnitude of radiation losses is close to zero even at V_n > V_l; at large values of U_3, the magnitude of radiation losses is large and for Lamb waves in the YZ-LiNbO3 plate with a thickness normalized to the wavelength of 1.75 and frequency 16.97 MHz it reaches a value of 4 dB/mm, comparable to the radiative losses of surface acoustic waves in the same material.

Keywords

radiation losses, surface acoustic waves, longitudinal volumetric acoustic wave, liquid

References

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