Analysis of GPR Wave Propagation in Complex Underground Structures Using CUDA-Implemented Conformal FDTD Method

Ground penetrating radar (GPR), as a kind of fast, effective, and nondestructive tool, has been widely applied to nondestructive testing of road quality. The finite-difference time-domain method (FDTD) is the common numerical method studying the GPR wave propagation law in layered structure. However...

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Bibliographic Details
Published in:International journal of antennas and propagation 2019, Vol.2019 (2019), p.1-11
Main Authors: Wang, Haitao, Zhang, Xiaowang, Ding, Xin, Fang, Hongyuan, Wang, Zibin, Lei, Jianwei, Yang, Man
Format: Article
Language:English
Subjects:
Acceleration
Accuracy
Algorithms
Antennas
Architectural engineering
Boundary conditions
Civil engineering
Computational efficiency
Computer simulation
Computing time
Efficiency
Electric fields
Finite difference time domain method
Finite element analysis
Ground penetrating radar
Mathematical models
Methods
Microprocessors
Model accuracy
Nondestructive testing
Numerical methods
Propagation
Simulation
Software
Time domain analysis
Underground structures
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Summary:Ground penetrating radar (GPR), as a kind of fast, effective, and nondestructive tool, has been widely applied to nondestructive testing of road quality. The finite-difference time-domain method (FDTD) is the common numerical method studying the GPR wave propagation law in layered structure. However, the numerical accuracy and computational efficiency are not high because of the Courant-Friedrichs-Lewy (CFL) stability condition. In order to improve the accuracy and efficiency of FDTD simulation model, a parallel conformal FDTD algorithm based on graphics processor unit (GPU) acceleration technology and surface conformal technique was developed. The numerical simulation results showed that CUDA-implemented conformal FDTD method could greatly reduce computational time and the pseudo-waves generated by the ladder approximation. And the efficiency and accuracy of the proposed method are higher than the traditional FDTD method in simulating GPR wave propagation in two-dimensional (2D) complex underground structures.
ISSN:1687-5869
1687-5877
DOI:10.1155/2019/5043028