| 垂直和倾斜断层围陷波的谱元法数值模拟及其波场特征对比 |
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| 引用本文： | 徐洪伟,王伟君.垂直和倾斜断层围陷波的谱元法数值模拟及其波场特征对比[J].中国地震研究,2015,29(2):176-189. |
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| 作者姓名： | 徐洪伟 王伟君 |
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| 作者单位： | 中国地震局地震预测研究所,北京100036;中国地震局地震预测研究所,北京100036 |
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| 基金项目： | This project was sponsored by the Key Basic Scientific Research Program of Institute of Earth Science，CEA (0213241302)． |
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| 摘 要： | Fault zone trapped waves( F ZTWs) m ainly travel along the fractured fault zone( F Z)which is of low velocity and high attenuation. FZTWs often carry significant information about a fault s internal structure,so it is important to understand their wave field characteristics for FZ structure inversion. Most previous simulations are based on vertical faults,while in this paper we implement the FZTW simulations on vertical or inclined faults and compare their wave fields in both time and frequency domains. The results show that the existence of fault zone and inclined angle of fault can significantly influence the features of waves near faults. In amplitude,a fault zone can generate a larger amplitude of waves. The velocity contrast between two walls of fault may lead to amplification of amplitudes in the low velocity fault wall. In frequency,a fault zone tends to influence the waves in the low frequency range. In a pattern of particle polarization of FZTWs,it tends to be single direction for vertical faults but fork to multiple directions for inclined faults,which might provide a new way to study the fault zone with FZTWs. These conclusions may be valuable for FZ structure inversion,and will enhance the knowledge on near-fault strong ground motions.
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| 关 键 词： | Fault zone trapped waves SEM simulation inclined fault Wave field characteristic |
| 收稿时间： | 2013/12/23 0:00:00 |
SEM Numerical Simulation of Vertical and Inclined Fault Zone Trapped Waves and Comparison of Their Wave Fields |
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| Xu Hongwei and Wang Weijun.SEM Numerical Simulation of Vertical and Inclined Fault Zone Trapped Waves and Comparison of Their Wave Fields[J].Earthquake Research in China,2015,29(2):176-189. |
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| Authors: | Xu Hongwei and Wang Weijun |
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| Institution: | Xu Hongwei;Wang Weijun;Key Laboratory of Earthquake Prediction Institute of Earthquake Science,CEA; |
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| Abstract: | |
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| Keywords: | Fault zone trapped waves SEM simulation inclined fault Wave field characteristic |
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