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为了定量分析闪电通过油量指示系统(FQIS)的线缆耦合到燃油箱的能量是否达到安全阙值,建立了FQIS线缆的等效模型,并以4种常见的电流路径对某大型客机进行了大电流注入的建模仿真。仿真分析得到不同路径的舱内外电磁环境和线缆感应电流,并且与最小点燃条件相比较。仿真结果表明,闪电以机头注入,右机翼流出或机尾流出这两种方式注入时,线缆的峰值电流>0.125 A,有可能引起燃油箱产生火花;闪电以左机翼或右机翼注入,机尾流出这两种方式注入时,线缆的峰值电流0.125 A,不可能引燃油箱。
In order to quantitatively analyze whether the energy of the lightning coupled to the fuel tank through the FQIS cable reaches the safety threshold, an equivalent model of the FQIS cable is established, and a large passenger aircraft is carried out with four common current paths High current injection modeling and simulation. Simulation analysis of different paths of electromagnetic environment inside and outside the cabin and the induced current, and with the minimum ignition conditions are compared. The simulation results show that the lightning peak current of> 0.125 A may lead to sparking in the fuel tank when the lightning is injected through the nose, the right wing or the tail, and the left wing or the right Wings injected, tail flow out of these two ways to inject, the peak current cable 0.125 A, it is impossible to fuel tank.