空气-海水两层模型中雷电在海水中产生的电磁场计算  

Electromagnetic field in sea generated by lightning in air-sea model

作　　者：李松[1] 龚沈光[1] 

机构地区：[1]海军工程大学兵器工程系,武汉430033

出　　处：《海军工程大学学报》2008年第6期40-44,共5页Journal of Naval University of Engineering

基　　金：国家部委基金资助项目(5144407105JB11)

摘　　要：将任意分布的电流源产生的电磁场看作是电偶极子产生的电磁场的叠加,利用镜像法推导了上半空间中的垂直直流电偶极子在两层媒质中产生电磁场的解析解。基于BG模型,将雷电回击通道等效为无穷多个电偶极子的组合,通过对回击通道积分,计算了在空气-海水两层模型中雷电在海水中产生的电磁场。模拟结果证明,雷电产生的电磁场是水下电磁场传感器设计必须考虑的因素之一。The electromagnetic field generated by the arbitrary distributed electric current source can be regarded as the superposition of the electromagnetic field generated by electric dipoles. The analytical expressions of the electromagnetic field generated by the DC electric dipole in the upper space for the two-layer mode were obtained by using the method of mirror image. Based on BG model, the lightning return stroke channel was equivalent to the combination of an infinite number of electric dipoles. The electromagnetic field in the sea was calculated by means of the integral of the channel. The simulation result shows that it is one of important factors for designing the underwater electromagnetic field sensor.

关 键 词：镜像法 直流电偶极子 BG模型 电磁场 传感器 

分 类 号：TM151[电气工程—电工理论与新技术]