Three-dimensional viscous-spring boundaries in time domain and dynamic analysis using explicit finite element method of saturated porous medium

被引：7

作者：

Li Wei-Hua ^{[1
]}

Liu Qing-Hua ^{[1
,2
]}

Zhao Cheng-Gang ^{[1
]}

机构：

[1] Beijing Jiao Tong Univ, Sch Civil Engn, Beijing 100044, Peoples R China

[2] Militaryarea Beijing, Unit 66469, Beijing 100042, Peoples R China

来源：

CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION | 2010年 / 53卷 / 10期

关键词：

Saturated porous media; Three-dimensional viscous-spring artificial boundary; Finite element method; PROPAGATION; WAVES;

D O I：

10.3969/j.issn.0001-5733.2010.10.020

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Based on Biot's dynamic theory for saturated porous media and the constitutive equations of poro-elastic media,this paper discusses the normal and tangential stress formulae on the artificial boundary of sphere shapes under the assumption of out-going spherical waves, and constitutes the three-dimensional viscous-spring boundaries in time domain for saturated porous media; According to the dynamic analysis of saturated porous media by using explicit finite element method, this paper develops the finite element method that could solve the three-dimensional problems, and develops finite element program. The analysis of the saturated porous medium dynamic response indicates that the combination method of the explicit finite element method and the three-dimensional viscous-spring boundary enjoy good accuracy and good stability.

引用

页码：2460 / 2469

页数：10

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