宽频带地震动混合模拟方法综述

孙晓丹1)陶夏新2,3)

摘要: 从发展现状、主要研究成果和可探讨问题等方面，对宽频带地震动混合(hybrid)模拟方法进行了系统的评述．首先介绍了混合模拟方法的发展历程，从高频段模拟技术、低频段模拟技术和宽频带合成技术及交叉频率等方面，介绍了混合模拟方法的研究现状；随后介绍了混合模拟方法发展过程中一些关键的改进，包括随频率变化的辐射因子、非线性场地放大因子、多重S-S波散射理论等；最后，对混合模拟方法中值得深入研究的问题进行了探讨．

关键词:

宽频带地震动　混合模拟　随机合成　有限差分& /
交叉频率

Abstract: Researches on hybrid simulation of broadband ground motion were overviewed in terms of the status, achievement and developing trend. The research status was introduced first in terms of high-frequency simulation approach, low-frequency simulation approach and a combined approach of the high-and low-frequency ground motions. Some improvements were introduced, including the frequency dependent radiation pattern, the frequency-dependent non-linear site amplification factor, the multiple S-S scattering theory, and so forth. Issues worth to be studied in present hybrid simulation were proposed.

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