FDTD求解高功率微波大气传播问题的可行性研究

Feasibility of solving high-power microwave propagation in the atmosphere using FDTD method

提出了应用时域有限差分(FDTD)方法对高功率微波(HPM)大气传播模型进行数值模拟。HPM大气传播模型是由Maxwell方程组和电子磁流体方程共同描述的。利用FDTD的特点,在适当的时间和空间位置对该方程组进行中心差分,获得其显式差分格式。并结合流体力学有限元分析中的边界处理方法,建立了一套全新、高效的求解HPM大气传播的数值方法,其计算量仅与空间网格步数相当,在普通PC机上就能完成相应计算。计算结果验证了该方法的合理性和正确性。

Using the finite difference time domain (FDTD) method,a method of numerical simulation for high-power microwave (HPM) propagation in the atmosphere is proposed.The HPM atmospheric propagation model is described together by Maxwell equations and the electronics magnetohydrodynamic equation.Considering the characteristics of the FDTD,those equations can be discretized by central difference method at appropriate time and spatial grid.Then the explicit difference schemes are obtained.Combining the method of dea...