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Study of stress waves in geomedia and effect of a soil cover layer on wave attenuation using a 1-D finite-difference method

机译:一维有限差分法研究土工介质中的应力波和土壤覆盖层对波衰减的影响

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The propagation and attenuation of blast-induced stress waves differs between geomedia such as rock or soil mass. This paper numerically studies the propagation and attenuation of blast-induced elastoplastic waves in deep geomedia by using a one-dimensional (I-D) finite-difference code. Firstly, the elastoplastic Cap models for rock and soil masses are introduced into the governing equations of spherical wave motion and a FORTRAN code based on the finite difference method is developed. Secondly, an underground spherical blast is simulated with this code and verified by software, RENEWTO. The propagation of stress-waves in rock and soil masses is numerically investigated, respectively. Finally, the effect of a soil cover layer on the attenuation of stress waves in the rear rock mass is studied. It is determined that large plastic deformation of geomedia can effectively dissipate the energy of stress-waves inward and the developed I-D finite difference code coupled with elastoplastic Cap models is convenient and effective in the numerical simulations for underground spherical explosion. (c) 2005 Elsevier Ltd. All rights reserved.
机译:爆炸引起的应力波的传播和衰减在诸如岩石或土壤质量的土工介质之间是不同的。本文使用一维(I-D)有限差分码,对深部地球介质中爆炸诱发的弹塑性波的传播和衰减进行了数值研究。首先,将岩石和土体的弹塑性帽模型引入球面运动的控制方程中,并基于有限差分法开发了一种FORTRAN代码。其次,用此代码模拟地下球形爆炸,并通过软件RENEWTO进行验证。分别对应力波在岩石和土壤中的传播进行了数值研究。最后,研究了土壤覆盖层对后岩体中应力波衰减的影响。可以确定,土工介质的大塑性变形可以有效地向内消散应力波的能量,所开发的I-D有限差分代码与弹塑性帽模型相结合,在地下球形爆炸的数值模拟中既方便又有效。 (c)2005 Elsevier Ltd.保留所有权利。

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