The Displacement and Strain Field of Three-Dimensional Rheologic Model of Earthquake Preparation

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	The Displacement and Strain Field of Three-Dimensional Rheologic Model of Earthquake Preparation
	Song ZP; Yin XC(尹祥础); Mei SR; Wang YC
刊名	Pure and Applied Geophysics
	2006
通讯作者邮箱	zpsong@sohu.com
ISSN号	0033-4553
通讯作者	Song, ZP (reprint author), Earthquake Adm Shanghai Municipal, Shanghai 200062, Peoples R China.
中文摘要	Based on the three-dimensional elastic inclusion model proposed by Dobrovolskii, we developed a rheological inclusion model to study earthquake preparation processes. By using the Corresponding Principle in the theory of rheologic mechanics, we derived the analytic expressions of viscoelastic displacement U(r, t) , V(r, t) and W(r, t), normal strains epsilon(xx) (r, t), epsilon(yy) (r, t) and epsilon(zz) (r, t) and the bulk strain theta (r, t) at an arbitrary point (x, y, z) in three directions of X axis, Y axis and Z axis produced by a three-dimensional inclusion in the semi-infinite rheologic medium defined by the standard linear rheologic model. Subsequent to the spatial-temporal variation of bulk strain being computed on the ground produced by such a spherical rheologic inclusion, interesting results are obtained, suggesting that the bulk strain produced by a hard inclusion change with time according to three stages (alpha, beta, gamma) with different characteristics, similar to that of geodetic deformation observations, but different with the results of a soft inclusion. These theoretical results can be used to explain the characteristics of spatial-temporal evolution, patterns, quadrant-distribution of earthquake precursors, the changeability, spontaneity and complexity of short-term and imminent-term precursors. It offers a theoretical base to build physical models for earthquake precursors and to predict the earthquakes.
学科主题	力学
类目[WOS]	Geochemistry & Geophysics
研究领域[WOS]	Geochemistry & Geophysics
收录类别	SCI
语种	英语
WOS记录号	WOS:000241455500017
公开日期	2007-06-15 ; 2007-12-05 ; 2009-06-23
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/16087]
专题	力学研究所_力学所知识产出(1956-2008)
推荐引用方式 GB/T 7714	Song ZP,Yin XC,Mei SR,et al. The Displacement and Strain Field of Three-Dimensional Rheologic Model of Earthquake Preparation[J]. Pure and Applied Geophysics,2006.
APA	Song ZP,尹祥础,Mei SR,&Wang YC.(2006).The Displacement and Strain Field of Three-Dimensional Rheologic Model of Earthquake Preparation.Pure and Applied Geophysics.
MLA	Song ZP,et al."The Displacement and Strain Field of Three-Dimensional Rheologic Model of Earthquake Preparation".Pure and Applied Geophysics (2006).