金属柱体雷电间接效应的回路导体仿真分析

Simulation analysis on return conductor configuration for lightning indirect effect test of metal cylinder

[目的]为了研究金属柱体类军械的雷电间接效应,[方法]研究一种搭建金属柱体类飞行物体雷电间接效应试验装置的方法,并设计一种类似于同轴线的笼型框架作为耦合装置。首先,研究不同终端负载下的电流波形,分析系统的电流谐振;然后,通过电磁仿真软件CST对金属柱体表面电流分布进行仿真,分析不同负载阻抗和不同回路导体排列结构对金属柱体表面电流分布均匀性的影响;最后,根据仿真结果,分析柱体结构表面电流密度及柱体内、外部瞬态电磁场的分布。[结果]仿真结果分析表明,这种类似于同轴线的笼型注入装置可用于金属柱体类物体的雷电间接效应试验。[结论]仿真结果可为下一步的试验提供基础。

[Objectives]In order to study the lightning indirect effect of metal cylindrical ordnance,a method for constructing the tester for lightning indirect effect of the metal cylindrical flying object is studied,and a cage type frame similar to coaxial line is designed as the coupling device.[Methods]Firstly,the current resonance of system is analyzed by observing the current waveform of different terminators.Then,through the electromagnetic simulation software CST,the surface current distribution of the metal cylinder is simulated,and the influences of different load impedance and different return conductor arrangement on the uniformity of surface current distribution are analyzed.Finally,according to the simulation results,the surface current intensity of cylinder and the instantaneous electromagnetic field distribution inside and outside the cylinder are analyzed.[Results]The simulation results show that the cage type injection device similar to coaxial line can be used for indirect lightning effect test of metal cylinders.[Conclusions]The simulation results provide a basis for the further test.