基于FEKO软件的鱼雷壳体屏蔽效能仿真

Shielding Effectiveness Simulation of Torpedo Shell Based on FEKO Software

鱼雷产品暴露在舰船甲板上时,处于高强电磁辐射场中,为保证雷内火工品的安全性,防止其不被意外点火,雷壳的电磁屏蔽效能非常重要。文中采用FEKO软件内置的矩量法(MOM)建立鱼雷壳体模型,对鱼雷壳体的电磁屏蔽效能进行了数值仿真,分析了壳体屏蔽效能随频率和结构的变化趋势,得出在谐振频率点附近,屏蔽效能表现恶劣;随着缝隙数目的增加,屏蔽效能越差。文中所做研究工作为鱼雷产品壳体屏蔽效能的测试和改善提供理论依据。

The torpedo exposed on the ship deck is in a high-intensity electromagnetic radiation field,in this case the electromagnetic shielding effectiveness of the torpedo shell is very important for ensuring the safety of the pyrotechnics in the torpedo,it is necessary to ensure the pyrotechnics are not accidentally ignited.In this paper,a simulation model of torpedo shell is established by the method of moment(MOM)built in FEKO software,and the electromagnetic shielding effectiveness of torpedo shell is simulated numerically.The variation trend of shell shielding effectiveness with frequency and structure is analyzed.It is concluded that the shielding effectiveness is poor near the resonance frequency point;and the larger the number of apertures is,the worse the shielding effectiveness becomes.This research may provide the theoretical basis for testing and improving the shielding effectiveness of torpedo shell.