Rundle模式地震滞后环和突变现象研究

STUDY ON THE HYSTERESIS LOOP AND CATASTROPHE OF RUNDLE MODEL EARTHQUAKE

摘要:

基于耗散结构理论详细研究了地震活动的主要特征.研究结果表明,地震活动呈现双稳态及尖拐突变现象.主要表现是:发生在应力场临界值区间[-p_c,p_c]内的滞后环现象和发生在临界值p_c和-p_c处的突变现象,前者对应系统应变能积累过程,后者(即强震过程)是该系统能量的主要耗散机制.

Abstract:

On the basis of the theory for dissipative structure, the main characteristics of Rundle model earthquake are studied in detail.It is found that the double-stable states and the cusp catastrophe are shown in the process of fault dislocation for Rundle model.There are the hysteresis loop of fault dislocation, as the external stress changes between the critical values p_c and -p_c, and catastrophes occurred at the critical values p_c and -p_c.The former corresponds to the accumulation of strain energy of the system, and the latter (i.e., strong earthquakes)is the main mechanism for energy dissipation of the system.