| 王颖,陈浩.孔隙介质与液体界面上波动方程数值模拟的改进 方案——MPML边界条件的应用*[J].,2018,37(6):849-854 |
| 孔隙介质与液体界面上波动方程数值模拟的改进 方案——MPML边界条件的应用* |
| An improvement scheme for the wave equation simulation at the porous medium-liquid interface—Application of the boundary condition of MPML |
| 投稿时间：2017-12-25 修订日期：2018-06-13 |
| 中文摘要: |
| 由于波场数值模拟的计算区域是有限的，为了压制截断边界造成的人工边界反射，通常采用完全匹配层（PML）作为吸收边界条件。但是在含液-固界面的弹性介质中进行正演模拟时，PML边界条件容易造成稳定性方面的问题。因此，本文将多轴完全匹配层（MPML）应用于该类介质的正演模拟，以改善PML边界条件引起的不稳定问题。通过在具有弹性海底的海洋环境模型以及充填液体的井孔模型中进行弹性波方程的正演模拟，分别采用传统的PML和MPML作为吸收边界条件，对比验证了MPML在含液-固界面弹性介质中数值模拟的有效性和稳定性。 |
| 英文摘要: |
| Due to the limited computation domain in wavefield simulation, the perfectly matched layer (PML) is usually used as absorbing boundary condition to suppress the artificial reflection caused by the truncated boundary. However, when simulating in elastic medium with liquid-solid interface, the stability problem for PML arises easily. So multi-axial perfectly matched layer (MPML) is applied in the paper for the simulation of the above medium, to modify the instability problem brought by PML. The elastic wave equation is simulated in ocean environment model with elastic seabed and borehole model with liquid filling, where traditional PML and MPML are used respectively, to compare and demonstrate the effectiveness and stability of MPML in simulation of medium with liquid-solid interface. |
| DOI：10.11684/j.issn.1000-310X.2018.06.003 |
| 中文关键词: 液-固界面，有限差分，PML，MPML，稳定性 |
| 英文关键词: Liquid-solid interface, Finite difference, PML, MPML, Stability |
| 基金项目:中国博士后科学基金资助项目 (2017M611017) |
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