舱内电气设备对舰船感应磁场的影响研究

Research on the influence of electric equipment in cabin on the induced magnetic field of ship

舰船机舱内部装有大量电气设备,由电磁产生的原理可知,电气设备中的线圈会因通电产生特定磁场,从而也会对舰船感应磁场产生影响。针对舰船模型在简化时因磁屏蔽效应存在常常忽略电气设备通电产生的磁场这一问题,采用数值分析方法,以某驱逐舰为研究对象,考虑电气设备产生磁场的部位为通电线圈,因此对舰船机舱内部的某电气设备简化为通电线圈。通过分析机舱内部电气设备在舰船磁导率、船体厚度的作用下,得出电气设备对舰船感应磁场的影响规律。结果表明,对于低磁导率、低厚度的舰船在进行感应磁场计算时,舰船内部电气设备在简化建模时需要考虑的必要性。所得规律可以快速地预测机舱内部的电气设备在建模计算时是否需要保留。

There are a lot of electric equipments in the engine room of a ship.According to the principle of electromagnetic generation,the coil in the electric equipments will produce special magnetic field,which will affect the induced magnetic field of the ship.In order to solve the problem that the magnetic field generated by the electrification of electrical equipment is often neglected due to the magnetic shielding effect when the ship model is simplified,this paper adopts the numerical analysis method and takes a certain destroyer as the research object,considering the position of magnetic field produced by electric equipment is electrified coil,so the electric equipment in the engine room of a ship is simplified as electrified coil.By analyzing the effect of the electrical equipment in the engine room on the magnetic field induced by the ship's permeability and the ship's thickness,the influence law of the electrical equipment on the ship's magnetic field is obtained.The results show that it is necessary to consider the necessity of simplified modeling for the electrical equipment in the ship with low permeability and low thickness when calculating the induced magnetic field.The obtained rule can quickly predict whether the electrical equipment in the engine room needs to be retained in the modeling calculation.