2012•Applied Mechanics and MaterialsOpen access

Simulation of Transient EMP Effects Coupling through Apertures Using Sub-Gridding FDTD Algorithm

Jin Shi Xiao, Xiong Wei Ren

Abstract

Transient electromagnetic pulse (EMP) can easily couple into the inner of targets via apertures. To calculate the EMP coupling effects on a cylinder object with openings, the coupling course is simulated using sub-gridding FDTD algorithm in this paper. Gauss pulse and double exponential pulse are selected as the incident pulse source. The coupling EM field strength E inside the object and the current density J on the surface are calculated. Several rules about EMP coupling effects are gotten both in time and frequency domain. The results can help us to understand the damage effects of transient EMP.

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Key concepts: Finite-difference time-domain method, Electromagnetic pulse, Transient (computer programming), Coupling (piping), Pulse (music), Time domain, Cylinder, Electromagnetic compatibility