摘要
分析了金属体在海水中运动产生感应电场的机理。采用镜像法推导了水下垂直和水平直流电流元在海水中的电场表达式,进一步导出了海水中运动金属体切割地磁场而在海水中产生的感应电场数学模型,并计算分析了运动金属体的感应电场大小及空间分布。仿真计算结果表明,20m长的金属椭球体,以4m/s的航速在水下10m航行时,在水下30m左右感应电场的量级为nV/m,并且该电场在空间分布上有明显的特征。
A mathematical model is proposed to calculate the electric fields induced by the motion of metal body across the earth＇s magnetic field, according to deriving the expressions of electric fields induced by the vertical and horizontal DC current under seawater using the mirror image method. The magnitude and spatial distribution characteristics of the electric fields were analyzed, the results show that in the 30m depth, the magnitude of the electric field induced by a 20m＇s long metal ellipsoid sailing 10m below water surface at the velocity of 4m/s is nV/m, and apparent characteristics can be noticed in its spatial distribution.
出处
《国防科技大学学报》
EI
CAS
CSCD
北大核心
2013年第6期147-151,共5页
Journal of National University of Defense Technology
基金
国家自然科学基金资助项目(51109215)
国家部委资助项目
关键词
感应电场
运动金属体
直流电流元
地磁场
induced electric fields
moving metal body
DC current element
earth＇ s magnetic field
