北京航空航天大学学报 ›› 2018, Vol. 44 ›› Issue (11): 2454-2462.doi: 10.13700/j.bh.1001-5965.2018.0180

• 论文 • 上一篇    

大型铁磁性物体近场磁异常场数值仿真

张梦颖, 王华, 葛霖, 程浩   

  1. 北京航空航天大学 宇航学院, 北京 100083
  • 收稿日期:2018-04-03 修回日期:2018-07-10 出版日期:2018-11-20 发布日期:2018-11-27
  • 通讯作者: 王华,E-mail:whua402@163.com E-mail:whua402@163.com
  • 作者简介:张梦颖,女,硕士研究生。主要研究方向:磁异常探测与路径修正;王华,男,博士,教授,博士生导师。主要研究方向:目标近场探测、微小型无人飞行平台设计。

Numerical simulation of near-field magnetic anomaly field for large-scale ferromagnetic objects

ZHANG Mengying, WANG Hua, GE Lin, CHENG Hao   

  1. School of Astronautics, Beijing University of Aeronautics and Astronautics, Beijing 100083, China
  • Received:2018-04-03 Revised:2018-07-10 Online:2018-11-20 Published:2018-11-27

摘要: 磁异常探测是一种在地球物理领域有着广泛应用的探测方法,磁异常场的空间分布规律信息是磁异常探测的主要理论依据。对矩形铁磁性物体空间磁场模型进行了推导,利用ANSYS Maxwell分析了大型铁磁性物体近场的磁异常场空间分布规律。针对不同地磁场方向条件,得到了近场空间磁感应强度总量分布及矢量分布规律,揭示了在不同条件下磁感应强度模量场和矢量场都具有普遍的对称性和规律性。通过对仿真模型进行缩比试验,测量了类似条件下模型近场的磁感应强度模量场和矢量场信息,验证了仿真得到的磁异常场空间分布规律的一致性和正确性。

关键词: 铁磁性物体, 近场, 磁异常场, 数值仿真, 缩比试验

Abstract: Magnetic anomaly detection is a widely used approach to detect ferromagnetic objects, which is mainly based on the spatial distribution of magnetic anomaly field. The spatial magnetic field model of rectangular ferromagnetic object is derived. The spatial distribution of the magnetic anomaly field in the near-field of the large-scale ferromagnetic target is analyzed using ANSYS Maxwell. For different geomagnetic field direction conditions, the laws of magnitude distribution and vector distribution of the magnetic induction in the near-field are obtained, which reveals a universal symmetry and regularity in magnetic induction modulus field and vector field. The shrinkage ratio experiment is conducted and the magnitude distribution and vector distribution of the magnetic induction in the near-field of model are measured in similar conditions, which validates the consistency and correctness of the spatial distribution law of magnetic anomaly field.

Key words: ferromagnetic objects, near-field, magnetic anomaly field, numerical simulation, shrinkage ratio test

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