Borehole-GPR numerical simulation of full wave field based on convolutional perfect matched layer boundary
来源期刊：中南大学学报(英文版)2013年第3期
论文作者：ZHU Zi-qiang(朱自强) PENG Ling-xing(彭凌星) LU guang-yin(鲁光银) MI Shi-wen(密士文)
文章页码：764 - 769
Key words：borehole-GPR; numerical simulation; convolutional perfect match layer; finite-difference time-domain method
Abstract: The absorbing boundary is the key in numerical simulation of borehole radar. Perfect match layer (PML) was chosen as the absorbing boundary in numerical simulation of GPR. But CPML (convolutional perfect match layer) approach that we have chosen has the advantage of being media independent. Beginning with the Maxwell equations in a two-dimensional structure, numerical formulas of finite-difference time-domain (FDTD) method with CPML boundary condition for transverse electric (TE) or transverse magnetic (TM) wave are presented in details. Also, there are three models for borehole-GPR simulation. By analyzing the simulation results, the features of targets in GPR are obtained, which can provide a better interpretation of real radar data. The results show that CPML is well suited for the simulation of borehole-GPR.
ZHU Zi-qiang(朱自强), PENG Ling-xing(彭凌星), LU guang-yin(鲁光银), MI Shi-wen(密士文)
(School of Geosciences and Info-Physics, Central South University, Changsha 410083, China)
Abstract:The absorbing boundary is the key in numerical simulation of borehole radar. Perfect match layer (PML) was chosen as the absorbing boundary in numerical simulation of GPR. But CPML (convolutional perfect match layer) approach that we have chosen has the advantage of being media independent. Beginning with the Maxwell equations in a two-dimensional structure, numerical formulas of finite-difference time-domain (FDTD) method with CPML boundary condition for transverse electric (TE) or transverse magnetic (TM) wave are presented in details. Also, there are three models for borehole-GPR simulation. By analyzing the simulation results, the features of targets in GPR are obtained, which can provide a better interpretation of real radar data. The results show that CPML is well suited for the simulation of borehole-GPR.
Key words:borehole-GPR; numerical simulation; convolutional perfect match layer; finite-difference time-domain method
