海水中时谐磁场的传播特性  

Propagation characteristics of harmonic magnetic field in seawater

作　　者：孙玉绘[1,2] 林春生[1] 贾文抖 翟国君[3] 

机构地区：[1]海军工程大学兵器工程系,武汉430033 [2]陆军军官学院无人机系,合肥230031 [3]海洋测绘研究所,天津300061

出　　处：《海军工程大学学报》2017年第3期18-21,25,共5页Journal of Naval University of Engineering

基　　金：国家自然科学基金资助项目(41374018;41476087)

摘　　要：依据Maxwell方程组和海水中电磁场边界条件,推导出均匀海水中水平环形线圈的时谐磁场表达式;采用折线逼近法和分步积分法,对海水中时谐磁场的传播特性进行了数值计算。在此基础上,采用环形线圈磁场产生器进行了时谐磁场试验研究。理论计算和试验结果均表明:随着距离的增大,海水中磁场各分量幅值减小,但衰减速率变慢;一定强度的主动源磁场在敏感距离内可以被仪器探测到。Based on Maxwell＇s equations and the electromagnetic field boundary condition in seawater, a harmonic magnetic field expression of the circular coil is deduced. The propagation characteristics of harmonic magnetic field in seawater are calculated by segment approaching method and partial integra- tion. Then the harmonic magnetic field experiment is carried out by a circular magnetic field genera- tor, and the theoretical calculation and experiment results are consistent which indicates that the mag- netic induction intensity and its attenuation rate decrease with the increase of distance, and the mag- netic field can be detected at a certain distance if the harmonic source is strong enough.

关 键 词：环形线圈 时谐磁场 双重贝塞尔函数积分 

分 类 号：TM153.1[电气工程—电工理论与新技术]