地壳应力状态及其在三维模拟计算中的意义

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，得到板赊壳中３个主应力３个最大剪应力随深度的变化曲线。

THE CRUSTAL STRESSSTATE AND ITSSIGNIFICANCE IN THREE DIMENSIONAL SIMULATIONS

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.