Simulation of electromagnetic environment inside railway

The environment inside of train is heavily polluted by electromagnetic noise from the railway system itself. These electromagnetic noise may do harmful to passengers and interrupted the communication devices. Aiming at analysis of electromagnetic environment inside railway, the shielding efficiency of enclosure will be researched at first. The electromagnetic field distribution around the cabinet is given in this paper. Then, a simulation model of environment inside train is set up to analyze electromagnetic field of different position in the train. The result shows that the maximum field strength is decreasing with the increase of the distance from disturbance source. At the same frequency, typical electromagnetic fields variation tendency are different according to position.