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高精度有限差分瑞雷面波模拟及频散特征提取

Keywords: 有限差分,瑞雷面波,频散特征,边界条件

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Abstract:

?瑞雷面波频散特征与地下介质特性有着密切的联系。利用瑞雷面波频散特征可反演浅层的地质结构。本文使用了灵活的高阶有限差分算子、合理的自由地表边界条件和高效的spml吸收边界条件,获得了高精度的瑞雷面波正演记录。在此基础上将数值模拟提取的频散特征与理论的频散特征进行对比,两者非常吻合,验证了瑞雷面波有限差分模拟的精度很高,可用来深入研究复杂情形下瑞雷面波的频散特征。

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