Low- and high-frequency nonlinear acoustic phenomena in a magnesite

被引:3
|
作者
Nazarov, V. E. [1 ]
Kolpakov, A. B. [2 ]
机构
[1] RAS, Inst Appl Phys, Nizhnii Novgorod 603950, Russia
[2] Civil Engn Inst, Nizhnii Novgorod 603950, Russia
基金
俄罗斯基础研究基金会;
关键词
Nonlinear acoustic waves; Hysteresis; Dissipative and elastic nonlinearity; Ultrasonic pulses; SELF-ACTION; WAVES; PROPAGATION; GENERATION; SOUND; MEDIA;
D O I
10.1016/j.ultras.2013.07.008
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
The results of experimental and theoretical studies of nonlinear acoustic phenomena (amplitude-dependent losses, resonant frequency shifts, damping of weak ultrasonic pulses and their carrier frequency phase delay under action of a powerful low-frequency pumping wave as well as amplitude-phase self-action of the finite-amplitude ultrasonic pulses) in a magnesite rod are presented. Analytical description of the observed phenomena was carried out within the frameworks of the phenomenological state equations that contain low-frequency hysteretic nonlinearity and both high-frequency dissipative and elastic nonlinearity. From comparison of experimental and analytical amplitude-frequency dependences of nonlinear phenomena, the values of magnesite acoustic nonlinearity parameters were determined. The frequency dependences have been discovered for hysteretic (in a range 3.6-17.2 kHz) as well as dissipative and elastic nonlinearity (in a range 50-370 kHz). (C) 2013 Published by Elsevier B.V.
引用
收藏
页码:471 / 478
页数:8
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