【摘要】 随着复合材料在飞机燃油箱生产制造中的大量使用,对其在高强度辐射场(high-intensity radiated fields,HIRF)中的防护研究势在必行。文章通过对飞机复合材料燃油箱开展低电平扫频场(low-level swept field,LLSF)试验,得到了油箱内不同位置处的屏蔽效能(shielding effectiveness,SE)变化规律,并采用CST电磁仿真软件,分析了复合材料油箱不同位置的频域屏蔽效能,从而对试验结果进行验证。研究结果表明,油箱内部不同位置处的屏蔽效能受孔缝所在位置的影响,仿真与试验结果具有较好的一致性。获得了不同电磁波辐照方向、不同天线极化方式和不同防护方式对复合材料油箱屏蔽效能的影响规律,可为飞机复合材料燃油箱在HIRF环境下的设计与防护提供参考。更多还原

【Abstract】 With the extensive use of composite materials in the manufacture of aircraft fuel tanks, protection against high-intensity radiated fields(HIRF) is imperative. Low-level swept field(LLSF) tests are performed on the aircraft composite fuel tank, the shielding effectiveness(SE) at different positions in the tank is obtained. The CST electromagnetic simulation method is used to analyze the SE in different positions of the composite fuel tank from the frequency domain perspective to verify the test. The research results show that the SE at different positions in the fuel tank is affected by the location of the slots. The simulation and test are in good agreement. The influences of different electromagnetic wave radiation directions, different antenna polarization methods and different protection methods on the SE of the composite fuel tank are obtained, which can provide a reference for the design and protection of aircraft composite fuel tanks in HIRF environment.更多还原