有尾焰动力飞行体电磁脉冲效应数值分析

 利用时域有限差分方法分析了动力段飞行体的等离子体高温尾焰对飞行体电磁脉冲效应的影响。计算结果表明：尾焰的存在极大地改变了飞行体蒙皮上感应电流密度的波形及分布；带尾焰飞行体感应皮电流密度不同于无尾焰时的情况；飞行体蒙皮感应电流密度的波形为衰减振铃信号波形,振铃周期等于电流波在整个飞行体和尾焰长度上流动两次的时间。

NUMERICAL SIMULATION OF EMP EFFECTS ON BOOST FLYER WITH EXHAUST PLUME

The purpose of this paper is to use the Finite Difference Time Domain (FD TD) method to determine numerically the influence of plasma exhaust plume to boost flyer on electromagnetic pulse effects. Computational datas indicate that the distribution of the induced skin current is seriously changed by the exhaust plume. The skin current density of the flyer with exhaust plume is quite larger than that of the flyer without exhaust plume. The waveform of the induced current is a decreased ringing wave and the ringing period equals twice to the time of induced current flowing along flyer and exhaust plume.