基于有限元的舰船轴频电场模拟源模型仿真

Simulation of marine shaft-rate frequency electric field of simulation source model based on finite element method

舰船轴频电场的频率为1~7 Hz之间,频谱具有明显的线谱特性,是舰船重要的特征信号。目前主要通过时谐电偶极子模型计算舰船的轴频电场分布。本文针对时谐电偶极子模型信号源失真的问题,利用有限元方法具有适应复杂结构、精度高的优点,以舰船的防腐蚀电流为依据,建立基于有限元的舰船轴频电场模拟源模型,并对模拟源模型的计算结果进行分析。结果表明：模拟源模型能计算出时谐电偶极子模型忽略掉的垂直于舰船的电场分量,提高了舰船轴频电场计算的精度;同时模拟源模型能够更准确的计算出舰船的近区轴频电场,特别是为水下兵器的电引信设计提供理论指导。

Frequency of shaft-rate frequency electric field of a ship is between 1 ~ 7 Hz,with line spectrum characteristics,is the important signal of ship. At present,the time-harmonic electric dipole model mostly is used to calculate the distribution of the shaft-rate frequency electric field of a ship. For solving the problem of source＇ s distortion of electric dipole model,according anti-corrosion currents,the paper makes use of the strongpoint of acclimatizing himself to complex structure and high precision of finite element method,constitutes and analyses the simulation source model based on finite element method. The analysis results show that the simulation source model improves the precision of marine shaft-rate frequency electric field for figuring out the electric field perpendicular to ship that the time-harmonic electric dipole model can＇t work out,and the simulation source model figures out more precise marine shaft-rate frequency electric field of near region of ship,which provides theoretical direction for trigger of underwater ordnance.