雁列断层应力场影响因素数值模拟分析

Simulation study on the influencing factors of stress field in echelon fault

利用有限元法,建立具有黏弹性力学参数的断层接触对,采用对比分析的方法,通过改变雁列断层的几何间距和黏滞系数,分析影响雁列断层构造应力场的因素和分布状态,模拟出雁列断层在失稳过程中,地震所产生的应力降和应力应变等以及第一、第二、第三主应力与断层之间的角度关系等。

In this paper,the fault contact pairs with viscoelastic mechanical parameters were established by using the finite element method.Through the comparative analysis method,factors affecting the tectonic stress field and the distribution state of the echelon fault were analyzed by changing the geometric spacing and viscosity coefficient of the fault.The stress drop and stress-strain relationship caused by earthquake during the instability process of the echelon fault were simulated,as well as the angle relationship among the first,second,and third principal stresses and fault.