Abstract
Lighting disaster is one of the common natural disasters. Railway signal system is an important guarantee for the safety of railway transportation. There are no standards to assess the impact of lighting disaster on railway signaling system now. The principles of lighting transmission are analyzed firstly in this paper. The impact degree of lightning disaster was studied according to the lighting principles. The emphasis on lighting is the effect of direct lighting and induction lighting. Then the risk component assessment models have been established on basis of the analysis of lightning effects. Finally the risk assessment model of lighting on signaling system is given.
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