Three-dimensional finite element simulation of different subway tunnels under stray current fields

In order to analyze the distribution rules and influence ranges of different subway tunnels,three-dimensional models of subway rectangular tunnels and subway sheild tunnels were established.By changing the value of carry-current,Ansys was used to simulate the distribution rule of subway stray current field under different geological conditions.Simulation results show that,the potential attenuation is nonlinear from the subway tunnel to the surrounding underground,and the greater the current,the greater the maximum potential.The amount of leakage stray current of rectangular tunnels is less than sheild tunnels under same geological condition and same carry-current.