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复杂形态UXO频率域有限元电磁探测仿真

Finite element electromagnetic detection simulation for complex UXO frequency domains
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摘要 为研究地雷及未爆弹在一定介质环境下的探测响应问题,笔者采用基于非结构网格的矢量有限元方法,进行全空间电磁感应仿真模拟,分别设计了2种复杂地雷及未爆弹模型,使用磁偶极子天线收发方式,计算出目标体二次场数据并进行快速成像。结果表明:该方法实现了检测地下复杂形态UXO异常信号的效果,在埋藏深度为0.5 m、采样频率为20 kHz的情况下,未爆弹电磁响应的虚部值约是实部值的10倍,可选择虚部作为水平定位主要参考依据,定位误差保持10%内,并且其响应特征可为反演模拟提供帮助。 To study the detection response of mines and unexploded bombs in certain medium environment,the authors use a vector finite element method based on a nonstructural grid,conduct a full-space electromagnetic induction simulation,design two complex mine and unexploded bomb models,respectively,use a magnetic dipole antenna transceiver method,and calculate the target body secondary field data and performs fast imaging.The results show that the method achieves the effect of detecting the anomalous signal of the underground complex form UXO,and the imaginary part value of the electromagnetic response of the unexploded bomb is about 10 times of the real part value at the burial depth of 0.5 m and the sampling frequency of 20 kHz,and the imaginary part can be selected as the main reference basis for horizontal positioning,and the positioning error is kept within 10%,and its response characteristics can be helpful for the inversion simulation.
作者 代郑 刘四新 师伟 陈春林 罗朝鹏 李红 DAI Zheng;LIU Sixin;SHI Wei;CHEN Chunlin;LUO Chaopeng;LI Hong(College of Geo-exploration Science and Technology,Jilin University,Changchun 130026,China;Science and Technology on Near-Surface Detection Laboratory,Wuxi 214001,Jiangsu,China)
出处 《世界地质》 CAS 2023年第2期351-356,共6页 World Geology
基金 近地面探测技术重点实验室预研基金(6142414200606)。
关键词 UXO探测 矢量有限元 电磁感应 UXO detection vector finite element electromagnetic induction
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