Analysis of Leakage Current Characteristics of Rail Insulation Fasteners Based on ANSYS

According to the common four layer structure of subway rail, insulating fastener, track bed and soil, the rail ground model is established by using ANSYS software, and the characteristics of leakage current on insulating fastener are analyzed. The analysis results show that when the loading current is constant, the insulation performance of the insulating fastener directly affects the leakage level of stray current, The lower the insulation performance of the insulating fastener, the greater the current density passing through the insulating fastener, that is, the greater the current leaking from the rail to the track bed and soil. The insulation performance can be improved by 10%-20% by changing the elastic backing plate at the bottom of the insulating fastener into several elastic backing plates with smaller thickness.