Simulation of Ground Penetrating Radar on Dispersive Media Based on Finite Element Time Domain Method
In order to analysis effect of media dispersion property to ground penetrating radar (GPR) signal, this paper developed a finite element time domain (FETD) algorithm of GPR on dispersive media.The media of linear dispersion is modeled by Debye model, which is incorporated into the FETD scheme by auxiliary differential equation.The computation domain is discretized by triangular elements in finite element Galerkin method.And the perfectly matched layer boundary condition is loaded to finite element equation of GPR with the variation form for truncate the computation domain.The validity of the developed FETD algorithm of dispersive media is tested by a homogenous dispersive GPR model and the accuracy is better than that of the finite difference domain (FDTD) method and the analytical solution.Moreover, Comparison of simulated results of a typical dispersive domain and non-dispersive media domain demonstrate that the material dispersion will bring a great challenge for quantitative interpretation of GPR, and the simulated results can effectively guide the accurate interpretation of the observed GPR data.
Ground Penetrating Radar finite element time domain method dispersive medium numerical simulation
Minglin Wang Honghua Wang
School of Earth Sciences, Guilin University of Technology, Guilin, P.R.China
国际会议
杭州
英文
492-496
2018-06-10（万方平台首次上网日期，不代表论文的发表时间）