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根据舰船水下腐蚀相关轴频电磁场信号的产生机理,该文提出可采用等效电流环模型对其进行模拟。借鉴极低频发信台的建造原理,提出了以海水、螺旋桨、转动轴、船壳、辅助阳极等形成的闭合回路为线索,对舰船进行电流环建模,即将轴频电磁场场源等效为由转动轴作弦与趋肤深度相关的曲线组成的闭合曲线。在实验室进行了验证试验,试验结果表明:腐蚀相关轴频电磁场场源不仅仅是辅助阳极和螺旋桨之间的电流线,还包括海水中分布的空间电流;基于电流环模型的轴频电磁场产生机理模型与试验结果具有很好的一致性,该模型为轴频电磁场建模及传播规律研究提供了一个新的思路和方法。
According to the generation mechanism of axial frequency electromagnetic signal related to underwater corrosion of warship, this paper proposes that it can be simulated by equivalent current loop model. Draw lessons from the construction principle of the extremely low frequency transmitter station, put forward the modeling of the current loop by taking the closed loop formed by seawater, propeller, rotating shaft, hull and auxiliary anode etc, The effect is a closed curve consisting of curves related to the skin depth by the axis of rotation. The experimental results show that the field source of corrosion-related axial frequency electromagnetic field is not only the current line between the auxiliary anode and the propeller, but also includes the space current distributed in the seawater. The axial frequency electromagnetic field generation based on the current loop model The mechanism model is in good agreement with the experimental results. This model provides a new idea and method for the research on the modeling and propagation of axial-frequency electromagnetic fields.