并行FDTD方法结合加窗技术分析屏蔽效能

强电磁脉冲透过孔缝耦合到金属屏蔽腔体内部,会对电子系统产生干扰和破坏作用。采用三维并行时域有限差分法结合加窗技术研究含孔缝金属腔体的屏蔽效能。并行方法能明显缩短相同时间步下腔体内采样电场收敛所需的仿真时间,结合加窗技术对时域电场数据进行截断,能够减少并行时域有限差分法仿真所需的时间步,进一步提高计算效率,有助于快速高效地分析复杂系统中的电磁屏蔽效能。

Analysis of Shielding Effectiveness of Metallic Cavity with Aperture by Combining Parallel FDTD Method with Windowing Technique

High power electromagnetic pulse couples into metallic shielding cavity through small apertures and slots, which can interfere with or destroy the electronic system. The Shielding Effectiveness (SE ) of metallic cavity with aperture was studied by combining 3D Parallel Finite-Difference Time-Domain (FDTD) method with Windowing technique. The simulating time when the sampling electric field in cavity converges can be reduced greatly with Parallel FDTD method. And then the sampling electric field in time domain is dealt with windowing technique, which can reduce the time steps that Parallel FDTD method needs. Combination of Parallel FDTD method with Windowing technique can enhance the simulating efficiency and will be helpful to analyzing the SE of more complex system in future.