基于并行FDTD方法的示波器机箱电磁脉冲耦合模拟

Coupling Effect Simulate of EMP into a Oscilloscope Case Based on the Parallel FDTD Method

电磁脉冲可以通过示波器上的孔缝和裸露的电缆线耦合进机箱内部,使检测到的信号波形发生畸变,甚至可能毁坏内部器件。基于并行自适应结构网格应用支撑软件框架,采用大规模并行时域有限差分方法(FDTD)模拟不同极化方向高斯脉冲正入射示波器机箱的耦合。计算结果表明,在线极化的电磁脉冲照射下,示波器内部主极化和其他方向都存在电场分量,不同极化波耦合进入的能量衰减速度不同。

Electromagnetic pulse（EMP） can couple into the oscilloscope case through the holes, slots and Bare cables. This effect can distort the detecting signals, even damage the internal devices. A large scale parallel Finite- Difference Time-Domain （FDTD） method based on the J parallel Adaptive Structured Mesh applications Infrastruc- ture （JASMIN） is proposed to analyse the coupling effect of EMP having different polarization direction into a oscil- loscope case. Numerical results indicate that, with linear polarized EMP illuminating, the electric field in the oscil- loscope consists of not only the main polarization component but also other components. The attenuation rate of en- ergy coupling into the case is different.