Simulation research on coupling of metal cavity near the lightning channel based on rocket-triggered Lightning Experiment

摘要

Since the thin metal layers results in limited shielding effectiveness against the dominant magnetic field generated by a lightning pulse, research on the shielding effectiveness of metal cavity with slot placed near a lightning channel is of great significance. In this paper, the magnetic fields measured at 78m distance from the classical rocket-triggered lightning flash during the SHandong Artificially Triggering Lightning Experiment (SHATLE) were compared with simulated magnetic fields, acquiring good agreement. The coupling effects of metal cavity with a slot placed at a distance of 78m from the lightning channel are then simulated and analyzed based on the simulation model. According to the simulation results, the location of lightning channel relative to the cavity has a great impact on the magnetic flux density inside the cavity. For the electromagnetic shielding and cooling, the slot located at the top side of the cavity has better performance.