地震学报（英文版）2005，Vol.18Issue(2)：171-179,9.
Numerical simulation for 1975 Haicheng and 1999 Xiuyan earthquake processes by DDA+FEM
Numerical simulation for 1975 Haicheng and 1999 Xiuyan earthquake processes by DDA+FEM
摘要
Abstract
In this paper, using discontinuous deformation analysis, we simulate numerically the processes of the 1975 Haicheng earthquake and the 1999 Xiuyan earthquake in the tectonic environment of North China where blocks restrict each other by DDA+FEM. Based on the research on the distribution of foreshocks and recent aftershocks of Xiuyan earthquake and the results from our study and other study on Haicheng earthquake, we present a tectonic block model of Haicheng and Xiuyan earthquakes. The results from numerical simulation include the variation of principal stress field released by these two earthquakes, contour patterns of maximum shear stress change, variation patterns of displacement vectors before and after the earthquakes and variation of the earthquake fault slip with time, which agree basically with the focal mechanisms, macroscopic isoseismal and horizontal displacement characters from observations.关键词
discontinuous deformation analysis/numerical simulation/rupture processes of earthquakeKey words
discontinuous deformation analysis/numerical simulation/rupture processes of earthquake分类
天文与地球科学引用本文复制引用
ZHANG Rui-qing,WEI Fu-sheng,QIAO Cheng-bin,LIN Bang-hui..Numerical simulation for 1975 Haicheng and 1999 Xiuyan earthquake processes by DDA+FEM[J].地震学报（英文版）,2005,18(2):171-179,9.基金项目
National Natural Science Foundation of China (40174011 and 40274029).Contribution No. 05FE3007, Institute of Geophysics, China Earthquake Administration. （40174011 and 40274029）
