Calculation of the Electric Field Generated by Vessel Moving Across Geomagnetic Field in Seawater

SUN Ming; GONG Shen-guang; ZHOU Jun; LU Xin-cheng

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Calculation of the Electric Field Generated by Vessel Moving Across Geomagnetic Field in Seawater

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- Calculation of the Electric Field Generated by Vessel Moving Across Geomagnetic Field in Seawater
- Acta Electronica Sinica Vol. 31, Issue 3, Pages: 464-467(2003)
- 作者机构：
  
  海军工程大学兵器工程系,湖北,武汉,430033
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM151
- Published：2003
- 稿件说明：
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SUN Ming, GONG Shen-guang, ZHOU Jun, et al. Calculation of the Electric Field Generated by Vessel Moving Across Geomagnetic Field in Seawater[J]. Acta Electronica Sinica, 2003, 31(3): 464-467.
DOI：

SUN Ming, GONG Shen-guang, ZHOU Jun, et al. Calculation of the Electric Field Generated by Vessel Moving Across Geomagnetic Field in Seawater[J]. Acta Electronica Sinica, 2003, 31(3): 464-467. DOI：

摘要

根据经典的Sommerfeld赫兹矢量分别推导出了空气和海水中水平直流电流元的电磁场表达式.在此基础上

根据瞬态连续性原理

推导出了运动舰船切割地磁场磁力线而产生的感应电场.以日本宙斯盾导弹驱逐舰"金刚"号为例

计算了它的感应电场大小及空间分布情况.结果表明

航速20kn时在离船壁5m左右能产生几个毫伏/米的感应电场

在目前的检测技术下该电场是完全可测的

并且该电场在空间分布有明显的特征.

Abstract

According to typical Sommerfeld Hertz vector

the electromagnetic field expressions are derived when horizontal DC current element is located in air half-space and seawater half-space respectively.Based on the result

the induced electric field of vessel moving across geomagnetic field is derived on the basis of transient state continuity theory.Take one Japanese missile destroyer for example

the magnitude and spatial distribution characteristics of its induced electric field are analyzed.The result indicates that the magnitude of electric field is several millivolt per meter at about five meters from hull when the vessel sails at a velocity of 20kn.According to the analysis

the induced electric field of vessel moving across geomagnetic field can be measured for certainty and its spatial distribution has apparent characteristics.

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