锁固段损伤过程中的能量转化与分配原理

锁固段是主控构造地震产生的地质结构，研究其损伤过程中的能量转化与分配原理，可加深对其损伤行为和能量演化机制的理解.基于能量守恒原理，阐明了受载锁固段内裂纹扩展时储存弹性应变能的转化与分配关系，提出了锁固段破裂事件的地震波辐射能计算公式.据此，在孕震断层多锁固段脆性破裂理论框架下，推导了主震判识的震级准则，论证了锁固段累积Benioff应变比与剪切应变比的等效性，提出了锁固段破裂事件的震源参数计算方法.实例分析表明，该方法可靠.该研究成果在主震判识、震源参数估算与复核等方面具有良好的应用前景.

Energy Conversion and Allocation Principle During the Damage Process of Locked Segment

Locked segment is the geological structure that governs the generation of tectonic earthquakes. As such， studying the energy conversion and allocation principle during the damage process of locked segment can make enhanced insights into its damage behavior and energy evolution mechanism. Based on the energy conservation principle， the relationship between conversion and allocation of elastic strain energy stored in a locked segment during crack propagation was elucidated， and a formula for calculating the radiated seismic energy generated from a cracking event in the locked segment was proposed. Hereby， using the brittle failure theory of multiple locked segments of seismogenic faults， the magnitude criterion for identifying a mainshock was derived， the equivalence between the cumulative Benioff strain ratio and the shear strain ratio was demonstrated， and the methods for calculating the source parameters of cracking event in a locked segment were presented. Case studies show that the methods are reliable. The present results have broad application prospects in identification of mainshock， estimation and verification of source parameters.