浅海中时谐水平电偶极子在空气中的极低频磁场  

Extremely low frequency magnetic fields in air produced by time-harmonic horizontal electric dipole in shallow sea

作　　者：孙玉绘[1,2] 林春生 吴海兵[2] 翟国君 SUN Yuhui;LIN Chunsheng;WU Haibing;ZHAI Guojun(College of Weapon Engineering,Naval University of Engineering,W u h a n 430033,China;PLA Army Academy of Artillery and Air Defense,Hefei 230031,China;College of Electronic Engineering,Naval University of Engineering,W u h a n 430033,China;Naval Institute of Hydrographic Surveying and Charting,Tianjin 300061,China)

机构地区：[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

出　　处：《国防科技大学学报》2018年第3期82-87,共6页Journal of National University of Defense Technology

基　　金：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)

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。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.

关 键 词：极低频磁场 时谐水平电偶极子 矢量磁位 航空磁探 

分 类 号：TM154[电气工程—电工理论与新技术]