| 基于谱元法的各向异性黏弹性介质地震波场模拟和分析 |
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| 引用本文： | 张平,韩立国.基于谱元法的各向异性黏弹性介质地震波场模拟和分析[J].世界地质,2017,36(1):255-265. |
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| 作者姓名： | 张平 韩立国 |
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| 作者单位： | 吉林大学 地球探测科学与技术学院, 长春 130026 |
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| 摘 要： | 基于谱元法计算理论,通过坐标旋转算法实现任意各向异性黏弹性介质中的地震波场计算,研究复合介质中地震波场特征。根据计算结果,qSV波表现为剪切滞弹性形变,qP波表现为膨胀滞弹性形变;品质因子不仅影响地震波振幅,还影响其传播频率;黏弹性介质吸收高频快,在一定频率范围内,黏弹性介质没有频散现象。
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| 关 键 词： | 谱元法 各向异性 黏弹性 品质因子 正演模拟 |
| 收稿时间： | 2016-05-30 |
| 修稿时间： | 2016-11-05 |
Seismic wave propagation modeling and analysis in anisotropic viscoelastic medium based on spectral element method |
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| ZHANG Ping,HAN Li-Guo.Seismic wave propagation modeling and analysis in anisotropic viscoelastic medium based on spectral element method[J].World Geology,2017,36(1):255-265. |
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| Authors: | ZHANG Ping HAN Li-Guo |
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| Institution: | College of Geo-exploration Science and Technology, Jilin University, Changchun 130026, China |
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| Abstract: | Based on the calculation theory of spectral element method, the authors used the coordinate rotation algorithm to calculate seismic wave field of arbitrary anisotropic viscoelastic medium to understand the characteristics of seismic wave field in complex media. The results of calculation indicate that qSV wave is a shear anelastic deformation and qP wave is expansion of anelastic deformation. Moreover, the quality factor not only affects the amplitude of seismic wave, but also the frequency of propagation. The viscoelastic medium absorbs high-frequency quickly and there is no frequency dispersion in certain frequency range. |
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| Keywords: | spectral element method anisotropy viscoelasticity quality factor forward modeling |
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