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地震 ›› 1998, Vol. 18 ›› Issue (3): 226-232.

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地壳应力状态及其在三维模拟计算中的意义

尹京苑, 梅世蓉   

  1. 中国北京 100036 中国地震局分析预报中心
  • 收稿日期:1998-02-05 修回日期:1998-02-27 出版日期:1998-07-31 发布日期:2022-09-08
  • 作者简介:尹京苑,男, 1955年3月出生,副研究员, 1995年获博士学位, 主要从事地震孕育理论和地震前兆机理研究。

THE CRUSTAL STRESS STATE AND ITS SIGNIFICANCE IN THREE DIMENSIONAL SIMULATIONS

Yin Jingyuan, Mei Shirong   

  1. Center for Analysis and Prediction, CSB, Beijing 100036, China
  • Received:1998-02-05 Revised:1998-02-27 Online:1998-07-31 Published:2022-09-08

摘要: 总结了三维数值模拟计算中在边界条件选择上存在的若干问题。提出了以地壳上层地应力实测资料为基础,以地区性的震源机制及壳内剪切强度规律为约束,逐步调整的方法,得到板内地壳中3个主应力和3个最大剪应力随深度的变化曲线。进而论证了复杂构造条件下三维数值模拟计算中边界条件的选择与可能得到的结果。

关键词: 边界条件, 板内地壳应力, 数值模拟计算

Abstract: In this paper, some problem regarding the boundary conditions in three dimensional simulations are put forward. Based on the observed data of the terrestrial stress in upper crust, and constrained by the regional focal mechanism and the law of shear strength, a method for determining the boundary condition is suggested. Some curves representing the change of three principal stresses and three maximum shear stresses with the depth in a crustal model are obtained. Then, we present how to choose the boundary condition for a three-dimensional model with complicated structures, and under this condition we discuss the possible results, which we may obtain.

Key words: Boundary condition, Crustal stress, Numerical simulation