基于旋转点电荷模型的舰船腐蚀电场

为了找出轴频电场无法彻底消除及实际测量中静电场产生波动曲线问题的原因,基于旋转点电荷的建模方法对舰船腐蚀电场进行研究。利用汉克尔变换对点电荷在三层介质中产生的电场进行近似求解,得出一定转速下感应电场随时间、螺旋桨半径及水面距离变化的规律曲线图,并通过实验验证了理论结果的正确性。结果表明:螺旋桨旋转产生的感应电场是构成舰船腐蚀电场的一部分,一定转速下的感应电场频率与螺旋桨转动频率一致,并会随着螺旋桨半径及与水面距离的增加而减小。

Ship corrosion electric field based on rotating point charge model

To research the reason why the shaft-rate electric field cannot be completely eliminated and the wave curve produced by the electrostatic field in the actual measurement, a modeling method based on rotating point charge was proposed to study the corrosion electric field of ships. The Hankel transform was used to approximate the electric field generated by point charges in the three-layer medium, the curves of induced electric field changing with time, propeller radius and water surface distance under certain rotational speed were obtained, and the correctness of the theoretical results was verified by experiments. The results showed that the induced electric field is a part of the corrosion electric field of ship, and the frequency of induced electric field is the same as the speed of propeller at a certain speed, and the amplitude of that frequency decreases with the increase of the radius of propeller and the distance from the water surface.