Analytical Solutions for a Monochromatic Wave Propagating in an Elastic Layer with Gradient Properties

IF 0.4 4区 物理与天体物理 Q4 PHYSICS, MULTIDISCIPLINARY
N. V. Chertova, Yu. V. Grinyaev
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引用次数: 0

Abstract

The paper studies the regularities of wave propagation in an inhomogeneous elastic layer with gradient properties varying along the layer thickness. The laws of change in elastic parameters are established at which the waves propagating in the direction of parameter change are harmonic. The waves propagating in the layer with a linear law of change in the elastic parameters are noт-harmonic. Analytical solutions obtained for a monochromatic wave defined on the boundary of a plane layer with a rigidly fixed second boundary are represented by special functions. In the case of gradient variation of the layer density, the solution is determined by a superposition of the Airy functions, in the case of equal relative variations of the density and elastic moduli, they are expressed through the modified Bessel functions, and in the case of arbitrary linear laws of variation in the elastic parameters, they are expressed through the confluent hypergeometric functions. Based on the analytical solution obtained for a layer with inhomogeneous density, the conditions for extreme values of displacements and strains are determined, and their distributions over the layer thickness are calculated and analyzed.

单色波在具有梯度特性的弹性层中传播的解析解
本文研究了波在非均质弹性层中传播的规律性,该层的梯度特性沿层厚变化。建立了弹性参数的变化规律,在此规律下,沿参数变化方向传播的波是谐波。在弹性参数呈线性变化规律的层中传播的波是非谐波。对于定义在平面层边界上的单色波,其第二边界是刚性固定的,所得到的解析解用特殊函数表示。在层密度梯度变化的情况下,解法由 Airy 函数的叠加决定;在密度和弹性模量相对变化相等的情况下,解法由修正贝塞尔函数表示;在弹性参数任意线性变化规律的情况下,解法由汇合超几何函数表示。根据非均质密度层的解析解,确定了位移和应变极值的条件,并计算和分析了它们在层厚度上的分布。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Russian Physics Journal
Russian Physics Journal PHYSICS, MULTIDISCIPLINARY-
CiteScore
1.00
自引率
50.00%
发文量
208
审稿时长
3-6 weeks
期刊介绍: Russian Physics Journal covers the broad spectrum of specialized research in applied physics, with emphasis on work with practical applications in solid-state physics, optics, and magnetism. Particularly interesting results are reported in connection with: electroluminescence and crystal phospors; semiconductors; phase transformations in solids; superconductivity; properties of thin films; and magnetomechanical phenomena.
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