弹体孔缝电磁脉冲耦合特性分析

The Characteristic Analysis of Electromagnetic Pulse Coupling Through Wing-slot of Missile

为提高导弹抗强电磁脉冲打击能力,采用有限积分法对弹翼孔缝电磁脉冲耦合特性进行了仿真研究。对比分析了入射波极化、入射方向、孔缝尺寸和弹翼对耦合系数的影响。结果表明:弹体孔缝电磁脉冲耦合具有明显的极化特性,圆极化波更易耦合进入腔体内部;孔缝长度影响共振频率,而孔缝宽度仅对耦合系数的大小有影响;弹翼的反射和边缘绕射能够增强孔缝的耦合效应。

To enhance a missile system＇ s capability of anti-electromagnetic pulses （EMP） , the finite integration technique （FIT） was em- ployed to compute the electromagnetic penetration through wing-slot into the missile cavity. The studies of EMP coupling, due to various polarizations and incident directions, slots of varying configurations, with or without the presence of wings were conducted. The results show that the slot has polarization character; The reflection of wings has great impact on coupling coefficients ; It is much easier for circularly polarized wave to penetrate into the cavity than other polarized waves ;The resonance frequency is mainly influenced by the length of slot