地震前兆的数值模拟  

Numerical simulation of seismic precursor

作　　者：李启成[1] 

机构地区：[1]黑龙江科技学院工程训练与基础实验中心,哈尔滨150027

出　　处：《黑龙江科技学院学报》2011年第6期489-492,共4页Journal of Heilongjiang Institute of Science and Technology

基　　金：黑龙江省教育厅科学技术研究项目(12513082)

摘　　要：针对均匀介质模型模拟地震前兆存在实际地壳介质不均匀、岩石破裂终止区域人为指定等不足,借助ANSYS 12.0数值模拟软件,采用不均匀介质模型模拟地震前兆现象。结果表明,弱介质区是地震前兆出现的主要区域,地震前兆的复杂性主要表现在弱介质区分布的复杂性。该结果能很好地解释地震空区、两头跳和密集—平静—大震的地震前兆现象,为地震预测研究提供了借鉴。Aimed at seeking an alternative to homogeneous geological model which suffers disadvantages,such as,inhomogeneity of practical crustal media and manual specification of terminal region of rock failure,in simulating seismic precursor,this paper introduces inhomogeneous geological model to simulate seismic precursor by means of ANSYS 12.0 numerical simulation software.The simulations show that weak medium areas are main areas where seismic precursor may occur,and complexity of seismic precursor may mainly lie in complicated distributions of weak medium areas.The simulations prove a better explanation for seismic gap,earthquake prediction models of bilateral jumping and denseness-quietude-large earthquake and are very beneficial to study of seismic forecasting.

关 键 词：地震前兆 不均匀地质模型 数值模拟 

分 类 号：P315.2[天文地球—地震学]