ISSN 1004-4140
CN 11-3017/P
Volume 31 Issue 3
May  2022
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LI G H, WANG S L, ZHANG W B, et al. Combined boundary of CPML and feature analysis within frequency-space domain[J]. CT Theory and Applications, 2022, 31(3): 269-279. DOI: 10.15953/j.ctta.2021.075. (in Chinese).
Citation: LI G H, WANG S L, ZHANG W B, et al. Combined boundary of CPML and feature analysis within frequency-space domain[J]. CT Theory and Applications, 2022, 31(3): 269-279. DOI: 10.15953/j.ctta.2021.075. (in Chinese).
shu

Combined Boundary of CPML and Feature Analysis within Frequency-Space Domain

  • 1.

    School of Earth Sciences and Engineering, Shandong University of Science and Technology, Qingdao 266590, China

  • 2.

    R & D center, BGP Inc., CNPC, Zhuozhou 072751, China

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  • Received Date: December 20, 2021
  • Accepted Date: January 16, 2022
  • Available Online: January 27, 2022
  • Published Date: May 22, 2022
    Graphical Abstract
    • Abstract
  • In the process of numerical simulation, boundary reflection is an important factor which affect the numerical simulation results. The actual underground medium holds anisotropic characteristics. The traditional perfectly matched layer boundary (PML) shows good effect on small incident angle seismic waves, yet it can not effectively absorb low-frequency waves and large angle incident waves. To solve the problem of boundary reflection, in this paper, we propose a combined boundary condition using convolution perfectly matched layer (CPML) and eigenvalue analysis method to be applied in the numerical simulation of finite difference method in frequency space domain. The numerical simulation experiment and boundary reflection absorption effect analysis of the combined boundary condition verify that the proposed method is a reliable artificial absorption boundary condition, which can effectively suppress the boundary reflection generated in the process of wave field simulation.
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    • References (25)
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