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首页> 外文期刊>Earthquake Science >3D Diffraction of obliquely incident SH waves by twin infinitely long cylindrical cavities in layered poroelastic half-space
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3D Diffraction of obliquely incident SH waves by twin infinitely long cylindrical cavities in layered poroelastic half-space

机译：层状多孔弹性半空间中双无限长圆柱腔对斜入射SH波的3D衍射

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Abstract This paper studies three-dimensional diffraction of obliquely incident plane SH waves by twin infinitely long cylindrical cavities in layered poroelastic half-space using indirect boundary element method. The approach is validated by comparison with the literature, and the effects of cavity interval, incident frequency, and boundary drainage condition on the diffraction are studied through numerical examples. It is shown that, the interaction between two cavities is significant and surface displacement peaks become large when two cavities are close, and the surface displacement may be significantly amplified by twin cavities, and the influence range with large amplification can be as wide as 40 times of the cavity radius. Surface displacements in dry poroelastic case and saturated poroelastic cases with drained and undrained boundaries are evidently different under certain circumstances, and the differences may be much larger than those in the free-field response.
机译：摘要利用间接边界元方法研究了层状多孔弹性半空间中无限长圆柱双腔在斜入射平面SH波上的三维衍射。通过与文献比较，验证了该方法的有效性，并通过数值算例研究了腔间距，入射频率和边界排水条件对衍射的影响。结果表明，两个腔之间的相互作用显着，两个腔接近时表面位移峰变大，双腔可明显放大表面位移，放大倍数的影响范围可达40倍。腔半径边界条件为排水和不排水的多孔多孔弹性和饱和多孔弹性的表面位移在某些情况下明显不同，并且差异可能比自由场响应中的差异大得多。

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