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世界地质 2023, 42(2) 351-356 DOI:
ISSN: 1004-5589 CN: 22-1111/P |
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| 基础地质 |
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复杂形态 UXO 频率域有限元电磁探测仿真 |
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代郑1 , 刘四新1 , 师伟1 , 陈春林1 , 罗朝鹏2 , 李红2 |
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1. 吉林大学 地球探测科学与技术学院, 长春 130026;
2. 近地面探测技术重点实验室, 江苏 无锡 214001 |
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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? |
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关键词：
UXO 探测
矢量有限元
电磁感应
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Finite element electromagnetic detection simulation for complex UXO frequency domains |
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DAI Zheng 1 , LIU Sixin 1 , SHI Wei 1 , CHEN Chunlin 1 , LUO Chaopeng 2 , LI Hong 2 |
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1. College of Geo?exploration Science and Technology, Jilin University, Changchun 130026, China;
2.Science and Technology on Near??Surface Detection Laboratory, Wuxi 214001, Jiangsu, China |
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Abstract:
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 re? sults 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. |
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Keywords:
UXO detection
vector finite element
electromagnetic induction
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