基于PWB方法的飞机机舱电磁屏蔽效能分析

Analysis of electromagnetic shielding effectiveness of an aircraft cabin based on PWB method

外部电磁场辐照下飞机的电磁兼容分析和电磁效应评估,需要进行飞机机舱的电磁耦合分析,以评估其屏蔽效能(SE)。由于全波分析方法的巨大计算代价和高频响应敏感性现象,统计电磁学理论的功率平衡(PWB)方法更适用于飞机机舱的SE分析。基于该方法开发了开孔腔体SE分析程序,通过和文献结果比较验证了程序的正确性和有效性。将其用于某飞机机舱在多种条件下的SE分析。结果证明有助于掌握舱壁电导率、舷窗、载客量、内部接收天线等影响SE的情况。

Electromagnetic compatibility analysis and electromagnetic effect evaluation of an aircraft illuminated by an external electromagnetic field are of great significance to flight safety.For this purpose,electromagnetic coupling analysis is needed to evaluate the Shielding Effectiveness(SE)of the aircraft cabin.Due to the high computational cost of full-wave analysis methods and the phenomenon of high frequency response sensitivity,the Power Balance(PWB)method based on statistical electromagnetics is more suitable for SE analysis for the aircraft cabin.An analysis program based on PWB method is developed,whose correctness and effectiveness are verified by comparing with literature results.The program is utilized to analyze SE of an aircraft cabin under various conditions.The obtained results contribute to understand how the various factors such as wall conductivity,portholes,passenger loads as well as internal receiving antennas affect the SE.