航空发动机雷击电磁仿真工程简化技术

Engineering Simplified Technology of Aeroengine Lightning Strike Electromagnetic Simulation

针对目前大型电器复合体三维电磁仿真过于耗时的问题,以某型航空发动机雷击电磁仿真任务为例,提出移除零部件与简化几何结构相结合的方法对整机几何模型进行简化。简化部件包括发动机的压气机、燃烧室、涡轮和尾喷管。采用传输线矩阵法进行仿真分析,得到不同零部件对发动机控制器线缆感应电流的影响,量化不同简化方法的影响,并且通过仿真验证了工程简化方案的合理性。结果表明:简化方法缩短了70%的仿真时间。

Aiming at the problem that 3D electromagnetic simulation of large electrical complex was too time-consuming at present,taking an aeroengine lightning strike electromagnetic simulation task as an example,a method combining removing parts and simplifying geometric structure was proposed to simplify the geometric model of the whole engine.Simplified components included engine compressor,combustion chamber,turbine and nozzle.The transmission-line matrix method was used to simulate and analyze the influence of different parts on the induced current of engine controller cable.The influence of different simplified methods was quantified,and the rationality of engineering simplification scheme was verified by simulation.The results show that the simplified method shortens 70%of the simulation time.