| 引用本文: | 孙玉绘,林春生,吴海兵,等.浅海中时谐水平电偶极子在空气中的极低频磁场.[J].国防科技大学学报,2018,40(3):82-87.[点击复制] |
| SUN Yuhui,LIN Chunsheng,WU Haibing,et al.Extremely low frequency magnetic fields in air produced by time harmonic horizontal electric dipole in shallow sea[J].Journal of National University of Defense Technology,2018,40(3):82-87[点击复制] |
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| 浅海中时谐水平电偶极子在空气中的极低频磁场 |
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(1. 海军工程大学 兵器工程学院， 湖北 武汉 430033;2. 陆军炮兵防空兵学院， 安徽 合肥 230031;3. 海军工程大学 电气工程学院， 湖北 武汉 430033;4. 海军海洋测绘研究所， 天津300061)
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| 摘要: |
| 为深入分析空气中的极低频磁场，用时谐水平电偶极子等效船舶被主轴调制的水下腐蚀相关电流。根据Maxwell方程组和电磁场边界条件建立浅海条件下电偶极子在空气中的矢量磁位模型，进一步推导了磁场表达式,并利用快速汉克尔变换计算磁场的传播规律。测量了水池碳棒电极和海上钛基电极的磁场，验证了磁场的实用性和模型的有效性。 |
| 关键词: 极低频磁场 时谐水平电偶极子 矢量磁位 航空磁探 |
| DOI：10.11887/j.cn.201803013 |
| 投稿日期：2017-04-08 |
| 基金项目:国家自然科学基金资助项目（41374018, 41476087）；国家重大科研装备研制资助项目（ZDYZ2012-1） |
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| Extremely low frequency magnetic fields in air produced by time harmonic horizontal electric dipole in shallow sea |
| SUN Yuhui1,2, LIN Chunsheng1, WU Haibing3, ZHAI Guojun4,5 |
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(1. College of Weapon Engineering, Naval University of Engineering, Wuhan 430033, China;2.
2. PLA Army Academy of Artillery and Air Defense, Hefei 230031, China;3.2. PLA Army Academy of Artillery and Air Defense, Hefei 230031, China;4.3. College of Electronic Engineering, Naval University of Engineering, Wuhan 4302. PLA Army Academy of Artillery and Air Defense, Hefei 230031, China033, China;5.
4. Naval Institute of Hydrographic Surveying and Charting, Tianjin 300061, China)
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| Abstract: |
| In order to analyze the ELF(extremely low frequency) magnetic field of ships, the corrosion related current modulated by the ship shaft was equivalent to a time harmonic HED (horizontal electric dipole). Based on Maxwell′s equations and boundary conditions of electromagnetic field, the magnetic vector potential in air was modeled, and then the magnetic field expressions of the HED were deduced. The propagation character of the magnetic field was calculated by fast Hankel transform. The magnetic field of carbon electrodes in the pool and Ti based electrodes at sea were measured. Result shows the practicality of the magnetic field and the validity of the model. |
| Keywords: extremely low frequency magnetic field time-harmonic horizontal electric dipole magnetic vector potential aerial magnetic detection |
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