| 基于Cerjan衰减函数的PML吸收边界条件 |
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| 引用本文： | 李飞,程久龙,杨思通.基于Cerjan衰减函数的PML吸收边界条件[J].物探与化探,2012,36(6):996-1000. |
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| 作者姓名： | 李飞 程久龙 杨思通 |
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| 作者单位： | 1. 山东科技大学矿山灾害预防控制教育部重点实验室,山东青岛,266590
2. 山东科技大学矿山灾害预防控制教育部重点实验室,山东青岛266590;中国矿业大学煤炭资源与安全开采国家重点实验室,北京100083 |
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| 基金项目： | 国家自然科学基金资助项目(50974081);国家自然科学基金资助项目(41204077);山东科技大学研究生科技创新基金资助项目(YCB120122) |
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| 摘 要： | 在Cerjan吸收边界和PML吸收边界的基础上提出了基于Cerjan衰减函数的PML吸收边界.通过两种吸收边界条件下地震波场模拟计算比较表明,后者具有吸收更干净且能够吸收各种角度的边界反射等优点,并且保留了前者操作简单的特点,计算时间少,适用于二维情形下的地震波数值模拟.
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| 关 键 词： | 地震波 数值模拟 有限差分 Cerjan衰减函数 PML |
A STUDY OF PML ABSORBING BOUNDARY BASED ON CERJIAN ATTENUATION FUNCTION |
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| LI Fei,CHENG Jiu-long,YANG Si-tong.A STUDY OF PML ABSORBING BOUNDARY BASED ON CERJIAN ATTENUATION FUNCTION[J].Geophysical and Geochemical Exploration,2012,36(6):996-1000. |
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| Authors: | LI Fei CHENG Jiu-long YANG Si-tong |
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| Institution: | 1(1.Key Laboratory of Mine Disaster Prevention and Control,Shandong University of Science and Technology,Qingdao 266590,China;2.State Key Laboratory of Coal Resources and Safe Mining,China University of Mining and Technology,Beijing 100083,China) |
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| Abstract: | This paper proposes PML absorbing boundary based on Cerjan attenuation function based on the study of Cerjan absorbing boundary and PMI, absorbing boundary. Wave field modeling calculations by using two absorl）ing boundary conditions show that PML absorbing boundary based on Cerjan attenuation function can perform absorption much more clearly and absorb the boundary reflection from various angles. Besides,its operation is easy,the calculation time is short, and it is suitable to seismic wave numerical modeling in two-dimensional situation. |
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| Keywords: | seismic wave numerical modeling finite difference Cerjan attenuation function PML absorbing boundary |
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