| 完全匹配层在数值模拟孔隙介质声波传播中的应用 |
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| 作者姓名： | Song Ruolong Ma Jun Wang Kexie |
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| 作者单位： | College of Physics, Jilin University, Changchun 130023, China. |
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| 基金项目： | This research was supported by Natural Science Foundation of China （ No. 403740043）. |
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| 摘 要： | The nonsplitting perfectly matched layer （NPML） absorbing boundary condition （ABC） was first provided by Wang and Tang （2003） for the finite-difference simulation of elastic wave propagation in solids. In this paper, the method is developed to extend the NPML to simulating elastic wave propagation in poroelastic media. Biot＇s equations are discretized and approximated to a staggered-grid by applying a fourth-order accurate central difference in space and a second-order accurate central difference in time. A cylindrical twolayer seismic model and a borehole model are chosen to validate the effectiveness of the NPML. The results show that the numerical solutions agree well with the solutions of the discrete wavenumber （DW） method.
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| 关 键 词： | 弹性波传播 数值模拟 边界吸收 超声波 地球物理勘探 |
| 收稿时间： | 2005-09-02 |
| 修稿时间： | 2005-09-022005-10-11 |
The application of the nonsplitting perfectly matched layer in numerical modeling of wave propagation in poroelastic media |
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| Song Ruolong Ma Jun Wang Kexie.The application of the nonsplitting perfectly matched layer in numerical modeling of wave propagation in poroelastic media[J].Applied Geophysics,2005,2(4):216-222. |
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| Authors: | Song Ruolong Ma Jun Wang Kexie |
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| Institution: | (1) College of Physics, Jilin University, 130023 Changchun, China |
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| Abstract: | The nonsplitting perfectly matched layer (NPML) absorbing boundary condition (ABC) was first provided by Wang and Tang (2003) for the finite-difference simulation of elastic wave propagation in solids. In this paper, the method is developed to extend the NPML to simulating elastic wave propagation in poroelastic media. Biot's equations are discretized and approximated to a staggered-grid by applying a fourth-order accurate central difference in space and a second-order accurate central difference in time. A cylindrical two-layer seismic model and a borehole model are chosen to validate the effectiveness of the NPML. The results show that the numerical solutions agree well with the solutions of the discrete wavenumber (DW) method. |
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| Keywords: | finite-difference numerical simulation absorbing boundary condition and perfectly matched layer |
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