电磁脉冲在坑道中传播分析方法

The Method for Analyses of Electromagnetic Pulse Propagation in Tunnels

摘要: 本文针对电磁脉冲在坑道中传播的问题，提出了一种基于FDTD方法的解决模型。仿真中采用卷积完全匹配层截断计算区域；对坑道的拱顶，采用共形的方案进行模拟；激励源采用超宽带脉冲；为克服仿真资源的占用对计算机硬件的要求，采用了并行的方案。最后我们建立的模型仿真了电磁脉冲在坑道中的传播，得到了一些规律，验证了本模型的有效性。

Abstract: In this paper, we propose a solution model based on Finite Difference Time Domain (FDTD) method to analyze the electromagnetic pulse propagation in tunnels. In this method, Conventional Perfectly Matched Layers (CPML) is occupied to truncate the computational domain, and conformal grids are used to model camber top of the tunnel. Ultra-wideband pulse is used as the source used to and parallel implementation is occupied to overcome the computer memory limit. The electromagnetic pulse propagation in tunnels is simulated and some propagation laws are found which demonstrate the efficiency of the proposed method.