FINITE-ELEMENT ANALYSIS OF FOCUSING FIELD IN NONLINEAR ACOUSTIC-WAVES

被引：8
作者：
TSUCHIYA, T
KAGAWA, Y
机构：
[1] Department of Electrical and Electronic Engineering, Okayama University, Okayama, 700
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1991年 / 30卷
关键词：
FINITE ELEMENT METHOD; NONLINEAR ACOUSTICS; FOCUSING SOUND SOURCE; NONLINEARITY PARAMETER; DIFFRACTION EFFECT;
D O I：
10.7567/JJAPS.30S1.51
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A finite element approach to focusing field calculation in nonlinear acoustic waves is proposed. Under the assumption of weak nonlinearity, a linearized equation for the second harmonic wave is discretized for finite element method in space including the nonlinearities due to both particle velocity and sound pressure. Numerical experiments confirm that the present method is valid for the analysis of focusing source with large aperture angle. The diffraction of the second harmonic field depends on the nonlinearity parameter B/A.
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页码：51 / 53
页数：3
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