经验格林函数法与随机有限断层法在合成近场强地震动中的联合运用

本文采取将经验格林函数法与随机有限断层法相结合的方式,突出体现了各自方法的优点,通过经验格林函数法确定地震震源参数,用随机有限断层法计算参数、检验其合理性。利用1998年新疆阿图什M6．9级地震的肘L4．7级余震记录,合成了这次地震的最大余震Ms6．0级地震的加速度记录,并将合成的结果与实际记录在频域和时域做了对比,分析研究了地震动特征和这次最大余震的可能破裂特征。同时对经验格林函数法需进一步改进的方向进行了探讨。

The Combine Application of Empirical Green's Function and Stochastic Finite Fault Method in Simulating Near-Site Strong Ground Motion

By combining semi-empirical Green＇s function method and stochastic finite faults method, the accelerograms of the biggest aftershock （Ms6.0） is synthesized on the basis of ML4.7 aftershock of an main event （M6.9） occurred in Atushi, Xinjiang in 1998. Earthquake epicenter parameters are determined by semi-empirical Green＇s function method, and rationality is calculated by stochastic method. The comparison between the synthesis results and actual records in frequency and time domains, seismic characteristics of the largest aftershock and the possibility of rupture characteristics are analyzed. In the end, the further improvement of semi-empirical Green＇s function method is discussed,