| 二维横向各向同性介质中人为边界反射的吸收——差分法弹性波场模拟 |
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| 引用本文： | 张中杰,何樵登.二维横向各向同性介质中人为边界反射的吸收——差分法弹性波场模拟[J].地球物理学报,1993,36(4):519-527. |
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| 作者姓名： | 张中杰 何樵登 |
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| 作者单位： | 1. 中国科学院地球物理研究所, 北京 100101;
2. 长春地质学院, 长春 130026 |
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| 摘 要： | 本文对有限差分法弹性波场三分量正演模拟中遇到的人为边界反射问题进行了研究,分别获得2-D横向各向同性介质中U_x,U_z,与U_y位移分量模拟时的边界吸收条件.从吸收边界上反射系数与入射角之间的关系可以说明,本文提出的边界吸收条件的吸收能力比较强.
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| 关 键 词： | 二维横向各向同性介质 有限差分法 三分量弹性波场 正演模拟 吸收边界条件 |
| 收稿时间： | 1992-02-25 |
THE ABSORBTION OF ARTIFICAL BOUNDARY REFLECTION IN 2-D TRANSVERSELY ISOTROPIC MEDIA WITH FDM-ELASTIC WAVEFIELDS MODELLING |
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| ZHANG ZHONG-JIE,HE QIAO-DENG,XU ZHONG-XIN.THE ABSORBTION OF ARTIFICAL BOUNDARY REFLECTION IN 2-D TRANSVERSELY ISOTROPIC MEDIA WITH FDM-ELASTIC WAVEFIELDS MODELLING[J].Chinese Journal of Geophysics,1993,36(4):519-527. |
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| Authors: | ZHANG ZHONG-JIE HE QIAO-DENG XU ZHONG-XIN |
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| Institution: | 1. Geophysical institute of Geophysics, Academia Sinica, Beijing 100101;
2. Changchun University of Earth Science, Changchun 130026 |
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| Abstract: | In this paper, we studied absorbing boundary conditions in the Ux, Uy and Uz component forward Modelling with FDM （Finite Difference Method）, and obtained partial differential equations for Ux, Uy and Uz component to eliminate artifical boundary reflection with absorbing condition, The reletion between reflection coefficients and incidence angle reveals that the ability of absorbing condition is powerful. |
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| Keywords: | 2-D TIM Finite difference method 3-component elastic wave- field Forward modelling Absorbing boundary condition |
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