用经验格林函数法和随机方法模拟卢龙地震的比较  

The comparison of simulated ground motions of Lulong Earthquake between empirical Green function method and stochastic method

作　　者：李启成[1,2] 景立平[1] 李中宁[3] 

机构地区：[1]中国地震局工程力学研究所,黑龙江哈尔滨150080 [2]黑龙江科技学院,黑龙江哈尔滨150027 [3]黑龙江大学,黑龙江哈尔滨150080

出　　处：《地震工程与工程振动》2009年第2期13-18,共6页Earthquake Engineering and Engineering Dynamics

基　　金：国家重点基础研究发展计划(973计划)“近场强地震动的破坏作用及其空间分布规律”(2007CB714201)

摘　　要：在介绍用经验格林函数方法和随机方法模拟地震动的基础上,分别用这两种方法模拟了卢龙5.7级地震。模拟结果表明,用经验格林函数方法模拟地震动的结果与地震记录符合得很好。用随机方法模拟地震动在高频部分与地震动记录符合得比较好,而在中、低频部分符合得不太好。两种方法比较,经验格林函数方法模拟的结果更符合实际记录。但随机方法具有计算简单、无需小震记录的优点,因此发展随机的方法是有意义的。随机方法中中、低频部分不太符合的原因是随机方法中的很多经验关系是在美国大陆得到的。因此建议加强对中国大陆经验关系的研究,并把中国大陆的经验关系加入到随机方法中,使随机的方法成为中国大陆普适的模拟地震动的方法。The ground motions of Lulong Earthquake （ ML = 5.7 ） are simulated with the empirical Green function method and stochastic method, respectively. The results show that the ground motion simulated by empirical Green function is consistent with the records very well and the ground motion stimulated by stochastic method is consistent with the records in high frequencies, and is not consistent with the records very well in middle and low frequencyies. To compare the two methods, the results calculated from empirical Green function are more suitable for China main land and the stochastic method has two advantages： simple computation and may be used without small earthquakes. Furthermore, the results simulated by stochastic method is not suitable to records in low and middle frequencies, because the used experiential relations were gotten from America continent. So, we suggest to study the experiential relations on Chinese continent and use the exp.eriential relations to the stochastic method and make this method suitable for Chinese continent.

关 键 词：经验格林函数 地震动 随机的方法 

分 类 号：P315.963[天文地球—地震学]