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Harmonic elastic waves in continuously heterogeneous random layers

机译:连续非均质随机层中的谐波弹性波

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摘要

Solutions for one dimensional elastic waves in a continuously heterogeneous layer are derived under fairly general material parameter constraints. These solutions are further developed for the case corresponding to horizontally polarized shear wave propagation under time harmonic conditions and a versatile Green's function due to a point source is derived, which includes material damping and the presence of a traction-free horizontal surface. Subsequently, randomness in the layer's material parameters is introduced and the perturbation technique is used for deriving mean values and covariances for the Green's function.
机译:在相当普遍的材料参数约束下,得出连续非均质层中一维弹性波的解。针对在时间谐波条件下水平极化剪切波传播的情况,进一步开发了这些解决方案,并推导了由于点源而产生的通用格林函数,其中包括材料阻尼和无牵引力的水平表面的存在。随后,引入层材料参数的随机性,并使用摄动技术来推导格林函数的平均值和协方差。

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