钢筋混凝土墙对电磁脉冲屏蔽的FDTD分析

Analysis of the Shielding Effects on Electromagnetic Pulses of Reinforce Concrete Walls by Using FDTD Method

钢筋混凝土墙对电磁波有衰减、反射和散射等影响,研究其屏蔽作用对于无线发射或接收设备在室内的正常工作,以及战场条件下对室内电子设备电磁攻防的双方都是很有研究价值的。基于时域有限差分法(FDTD)和傅立叶变换讨论了钢筋混凝土墙体对电磁脉冲的屏蔽效果。讨论了钢筋网、混凝土墙发生谐振的现象,给出了钢筋网的排列周期、钢筋直径、混凝土墙的厚度、介电常数、电导率等参数对于电磁波屏蔽效果的影响,并对计算结果进行了理论分析,结论对于相关研究具有借鉴作用。

Since reinforce concrete walls of buildings have important influences on the reflection, transmission and diffraction of electromagnetic waves, it is critical to study the shielding effects of reinforce concrete walls for civilian wireless communication and electromagnetic attacking and defending in military situation. Thus, the shielding effects of reinforce concrete walls are analyzed by using FDTD and Fourier Method. Based on the analysis of the numeral results, it is shown that resonance will occur in reinforce concrete walls and the relationship of the shielding effects with periodic and diameter of rebar lattice, thickness, dielectric constant ,conductivity of concrete wall, and so on is derived, which will be useful for the associated researches.