交隐式BOR-FDTD在非核电磁脉冲导线耦合分析中的应用
Simulation of non-nuclear EMP coupling to thin wire using ADI-BOR-FDTD
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摘要: 交隐式BOR-FDTD能将3维空间电磁问题转换到2维空间处理，具有节省计算时间和计算机内存的优点。运用该算法结合平面波的柱面波展开，通过总场/散射场连接边界条件引入入射平面波，计算了高功率微波和超宽带电磁脉冲作用下自由空间有限长导线上的感应电流，并对感应电流峰值和导线长度之间的变化关系进行了分析。计算结果表明:与传统3维FDTD算法比较，交隐式BOR-FDTD算法在节省大量计算机内存的同时可将计算速度提高数倍。Abstract: The ADI-BOR-FDTD method can reduce a three-dimensional problem to a two-dimensional one, resulting in an efficient saving of CPU running time and memory requirement. By incorporating the plane wave expanding technique and total-field/scattered-field boundary into ADI-BOR-FDTD method, the non-nuclear EMP coupling to thin wire in free space was simulated. The relation between the peak value of induced current and the length of wire was analyzed. Numerical results indicate that the ADI-BOR-FDTD method runs several times faster than conventional three-dimensional FDTD method and saves a great deal of computational memory.
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