浅海中潜艇腐蚀相关静态电磁信号特征

Characteristic analysis of corrosion-related static electromagnetic field produced by a submarine in shallow sea

来源于腐蚀及防腐电流的静态电、磁信号是潜艇水下新的重要目标特性。为掌握其水下分布特征,采用三层平行分层导电媒质中的水平直流电偶极子对其进行建模。结合水平直流电偶极子全空间中的电场、磁场表达式的推导,通过数值仿真计算,对比分析海水中腐蚀相关静态电场及静态磁场的分布特征及远场衰减规律。分析表明:浅海中潜艇腐蚀相关静态电场近场量值大,分布特征明显,适合做水中兵器引信的信号源;磁场远场按距离的平方反比衰减,可用于潜艇的远程探测和定位。

The static electric field and magnetic field resulting from the corrosion or anticorrosion current of a submarine are important new target signatures. In order to grasp their distribution characteristics, a static horizontal electric dipole located in a three-layer conductive media space is adopted to simulate the fields. Based on the derivation of the expressions for the static electric and magnetic field distribution in all the space produced by a horizontal static electric dipole located in the middle layer, the numerical simulation method is used to do a comparative analysis of the distribution characteristics of the corrosion-related static electric field and magnetic field as well as the attenuation law of their far field. The research results show that the near-field of the corrosion-related static electric field is suitable for a signal source of the underwater ordnance fuse because of its measureable magnitude and obvious distribution characteristics, while the far-field of the magnetic field is suitable for a signal source for remote detection or location because it attenuates with the inverse square of the distance.