基于高阶FDTD(2,4)与MNA混合方法求解导弹系统线缆的瞬态电磁脉冲耦合效应

Solving the Coupling Effect of the Transient Electromagnetic Pulse of the Cables of the Guided-missile System Based on the High Order FDTD(2,4) and MNA Hybrid Method

提出一种高阶时域有限差分与改进节点分析的混合方法,计算弹载系统内线缆的强电磁脉冲耦合效应问题。将线与路通过混合单端口模型进行拆分,有效实现了基于线缆分析的FDTD(2,4)与基于电路方程的MNA法独立快速求解。同时,通过采用分布源等效的方式,将外场引入到电报方程组,使得求解更加简便有效。数值算例表明了该方法的高效率及高精度。

This paper puts forward the hybrid method of a high order modified nodal analysis to calculate the strong electromagnetic pulse finite difference time domain and the coupling effect of the cables in the guided-missile system. The line and the road are separated through the mixed single port model, realizing effectively the FDTD （2, 4 ） which is based on the analysis of the cable and fast computation of MNA method based on the circuit equations. At the same time, by using the method of distributing source equiv-alent and getting the outfield into the telegraph equations, the solution is more convenient and effective. The numerical examples show that the method is efficient and of high precision.