探地雷达频率域2.5维正演  

Frequency Domain 2.5D GPR Forward Modeling

作　　者：戴世坤[1,2] 欧阳振崇 周印明 张钱江[4] 李昆[1,2] 赵东东[1,2] 陈轻蕊[1,2] 凌嘉宣 DAI Shikun;OUYANG Zhenchong;ZHOU Yinming;ZHANG Qianjiang;LI Kun;ZHAO Dongdong;CHEN Qingrui;LING Jiaxuan(School of Geosciences and Info-physics,Central South University,Changsha 410083,China;Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring of Ministry of Education,Central South University,Changsha 410083,China;Department of Non-seismic Exploration,Bureau of Geophysical Prospecting,Zhuozhou 072751,China;School of Earth Science of Guilin University of Technology,Guilin 541006,China)

机构地区：[1]中南大学地球科学与信息物理学院,长沙410083 [2]中南大学有色金属成矿预测与地质环境监测教育部重点实验室,长沙410083 [3]东方地球物理公司综合物化探处,涿州072751 [4]桂林理工大学地球科学学院,桂林541006

出　　处：《电子与信息学报》2021年第1期145-153,共9页Journal of Electronics & Information Technology

基　　金：国家重点研发计划(2018YFC0603602);国家自然科学基金(41574127);中南大学研究生自主探索创新项目(2018zzts707,2018zzts200,2018zzts203)。

摘　　要：该文从频率域电磁法满足的控制方程出发,采用有限单元法实现了频率域2.5维探地雷达(GPR)正演模拟。重点分析了波数域电磁场谱随相对介电常数和收发距变化的规律,探讨了2.5维GPR正演模拟的波数选取问题;基于Open MP并行算法与串行算法的计算效率对比,表明频率域2.5维GPR数值模拟方法具有高效率、高精度和高度并行性的特点,为雷达正演提供重要理论参考依据和技术支撑,是GPR全波形反演的重要基础。Based on the governing equations satisfied by the electromagnetic method of the frequency domain,the finite element method is used to realize the forward simulation of a 2.5D Ground Penetrating Radar(GPR)in the frequency domain.The law of the electromagnetic field spectrum in the wavenumber domain with the relative permittivity and the transmission and reception distance is analyzed in detail.The selection of the wave number in the 2.5D GPR forward modeling simulation is discussed.Based on the comparison of the computational efficiency of the Open MP parallel algorithm and the serial algorithm,the results show that the 2.5-dimensional GPR numerical simulation method in the frequency domain has the characteristics of high efficiency,high precision,and high parallelism.It provides important theoretical reference and technical support for radar forward modeling,and provides an important foundation for GPR full waveform inversion.

关 键 词：探地雷达 正演 2.5维 频率域 波数选取 Open MP 并行 

分 类 号：TN959[电子电信—信号与信息处理]