地震强度分布不均匀性的摩擦时间依从CA模型*

地震 ›› 2001, Vol. 21 ›› Issue (2): 22-28.

地震强度分布不均匀性的摩擦时间依从CA模型^*

刘桂萍, 傅征祥

中国地震局分析预报中心,北京 100036

收稿日期:2000-10-08 修回日期:2000-11-01 出版日期:2001-04-30 发布日期:2022-10-27
作者简介:刘桂萍(1966-),女,天津人,副研究员,2000年获博士学位,主要从事综合地震预报、地震活动性及其力学机制研究。
基金资助:
国家重点基础研究发展规划项目(G1998040706)

Application of the friction time-dependent cellular automaton model of seismicity to the study of heterogeneity of intensity distribution of earthquakes

LIU Gui-ping, FU Zheng-xiang

Center for Analysis and Prediction, CSB, Beijing 100036, China

Received:2000-10-08 Revised:2000-11-01 Online:2001-04-30 Published:2022-10-27

摘要/Abstract

摘要： 设计一个摩擦时间依从的地震活动性细胞自动机模型(CA) ,研究产生地震累积频度-震级关系曲线中,出现拐点的地震强度分布不均匀现象的物理原因。外界通过应力加载向模型输入能量,模型的细胞之间存在非线性的相互作用。对比分析规定单个细胞破裂与模型地震之间不同的决定规则时产生的地震序列的累积频度-震级关系,研究结果表明,地震的级联破裂方式是引起累积频度-震级关系在震级较低范围和震级较高范围之间不连续的因素之一。

关键词: 细胞自动机, 强度分布不均匀性, 级联破裂, 摩擦时间依从

Abstract: In this paper, afriction time-dependent cellular automaton model of seismici ty is desig ned to study the phenomena of the heterogeneity of intensity dist ribution of earthquakes, which is displayed by that some accumulative frequency-mag ni tude relation curves of earthquakes have a breaking point. Energy is put into the model by loading from outside and there is nonlinear interaction among cells. The accumulative frequency-mag ni tude relations produced under different rules of the breaking of single cell and the breaking behave of earthquakes are analyzed. The result show sthat the cascade breaking way of earthquakes is one of the causes that produce the heterogeneity of accumulative frequency-magni tude relation in low ermagnitude and higher magnitude range.

Key words: Cellular automaton, Intensity distribution heterogeneity, Cascade breaking, Friction time-dependence

中图分类号:

P315.5

刘桂萍, 傅征祥. 地震强度分布不均匀性的摩擦时间依从CA模型^*[J]. 地震, 2001, 21(2): 22-28.

LIU Gui-ping, FU Zheng-xiang. Application of the friction time-dependent cellular automaton model of seismicity to the study of heterogeneity of intensity distribution of earthquakes[J]. EARTHQUAKE, 2001, 21(2): 22-28.

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