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地震动有限元模拟方法的精度验证

, PP. 38-42

Keywords: 活动断层,位错,地震波数值模拟,有限元方法

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Abstract:

假定破裂断层到地面覆盖层之间的地壳结构为均匀的各向同性介质,将移动位错源在全空间辐射的地震波作为覆盖层底部的入射波,采用有限元方法进行覆盖层地震响应分析,就能得到考虑断层破裂过程的地震动数值模拟结果。这种方法可以大大减小计算区域,从而提高计算效率。本文对基于位错源得到的均匀弹性全空间的解析解和有限元法的结果进行了比较,验证了该方法的计算精度。

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