Abstract
Results of experimental studies of nonlinear acoustic effects, namely, the attenuation of a weak ultrasonic pulse under the action of an intense low-frequency pumping wave and the limitation of the ultrasonic pulse amplitude in rod-type resonators made of unannealed and annealed polycrystalline zinc, are presented. The measurements are performed for the first four longitudinal modes of the rods with the frequency of the ultrasonic pulses varying from 40 kHz to 1 MHz. An analytical description of this effect is presented in the framework of the phenomenological equation of state allowing for dissipative nonlinearity. A modification of the Granato-Lucke dislocation theory that explains the experimentally observed amplitude and frequency dependences of the coefficient of nonlinear attenuation of ultrasonic pulses is proposed. Estimates for the parameters of the modified model are obtained from the comparison of theoretical and experimental data.
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Translated from Akusticheski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Zhurnal, Vol. 47, No. 4, 2001, pp. 509–519.
Original Russian Text Copyright © 2001 by Nazarov.
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Nazarov, V.E. Dissipative acoustic nonlinearity of polycrystalline zinc. Acoust. Phys. 47, 438–447 (2001). https://doi.org/10.1134/1.1385418
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DOI: https://doi.org/10.1134/1.1385418