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相位演化零点时间与地震动模拟研究

, PP. 158-166

Keywords: 零点时间,波群,相位谱,非平稳,地震动

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Abstract:

提出了多频分量相位演化零点时间的概念。对于复杂非平稳地震动过程,为降低求解多频分量相位演化零点时间的工作量,引入地震波波群演化的思想,在地震波相位谱敏感性分析的基础上,考察了典型实测地震动时程的模拟。结果表明,拟合地震动过程与实测非平稳地震动吻合较好,本文提出的相位谱重构方法具有重要的实践意义。同时,这一方法也为非平稳随机地震动建模提供了新的可能途径。

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