Knowledge Management System of Institue of Mechanics, CAS
| The Displacement and Strain Field of Three-Dimensional Rheologic Model of Earthquake Preparation | |
| Song ZP; Yin XC(尹祥础); Mei SR; Wang YC; Yin C; Zhang HH(张晖辉); Zhang LP(张浪平) | |
| Source Publication | Pure and Applied Geophysics |
| 2004-07-09 | |
| Pages | 1991-2009 |
| Conference Name | 4th ACES Workshop 2004, JUL 09-14, 2004 Beijing, PEOPLES R CHINA |
| Abstract | 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. |
| WOS ID | WOS:000241455500017 |
| Indexed By | CPCI-S |
| Language | 英语 |
| Citation statistics | |
| Document Type | 会议论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/13785 |
| Collection | 力学所知识产出(1956-2008) |
| Corresponding Author | Yin XC(尹祥础) |
| Recommended Citation GB/T 7714 | Song ZP,Yin XC,Mei SR,et al. The Displacement and Strain Field of Three-Dimensional Rheologic Model of Earthquake Preparation[C]Pure and Applied Geophysics,2004:1991-2009. |
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