地壳应力状态及其在三维模拟计算中的意义  

THE CRUSTAL STRESSSTATE AND ITSSIGNIFICANCE IN THREE DIMENSIONAL SIMULATIONS

作　　者：尹京苑[1] 梅世蓉[1] 

机构地区：[1]中国地震局分析预报中心,中国北京100036

出　　处：《地震》1998年第3期226-232,共7页Earthquake

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。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 fordetermining 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 presenthow 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.

关 键 词：边界条件 板内 地壳应力 数值模拟计算 地震地质 

分 类 号：P315.2[天文地球—地震学] P553[天文地球—固体地球物理学]