介绍了用于集总负载平行板有界波电磁脉冲模拟器模拟的并行时域有限差分方法，分析了模拟器的几个尺寸参数对工作空间的场的影响。研究表明：当下金属板宽度大于或等于工作空间平板宽度的1.5倍时，前过渡段附近的测试点电场的上升沿受前过渡段投影长度的影响较小，而工作空间中心附近的测试点电场的上升沿则随着投影长度的增大而减小，但减小趋于平缓；所有测试点电场的上升沿均随下金属板宽度的增大而减小，但减小趋于平缓；对于前过渡段投影长度固定的模拟器，其高度并不是越小(大)越好，而是存在一个最佳高度值。

A parallelized finitedifference timedomain(FDTD) method for simulating the bounded wave electromagnetic pulse (EMP) simulator with lumped terminator and parallel plate is presented. The effects of several modelparameters of the simulator on the fields in the working volume are simulated and analyzed. The results show that if the width of the lower PEC plate is(or is bigger than)1.5 times that of the upper plate of working volume, the projection length of front transitional section does not have a significant effect on the risetimes of electric fields at the points near the front transitional section, and the risetimes of electric fields at the points near the working volume center decrease as the projection length increases, but the decreasement of risetime decreases. The risetimes of Ez at all points also decrease as the lower PEC plate’s width increases, but the decreasement of risetime decreases. If the projection length of the front transitional section is fixed, the good results can not be obtained by increasing or decreasing the height of the simulator only, however, which has an optimal value.