The Effect of Running Speed of High Speed Trains on the Surface Erosion of Pantograph Strip under Pantograph Arc

High speed railway plays an important role in social development for its advantages of fast running speed, high comfort, good punctuality and large capacity. However, frequent and intense pantograph catenary arc has a great threat to train normal running. There is an urgent requirement to build a reasonable standard to evaluate pantograph catenary interaction via pantograph catenary arc duration. In this paper, a new evaluation criterion model based on pantograph strip erosion mass loss caused by pantograph catenary arc is proposed. Firstly, a pantograph catenary arc model is built to obtain the heat flux density injected into pantograph strip. Then the heat flux is set as a moving heat source whose frequency is related to train running speed. Study results show the mass loss area presents an approximately linear increase at different running speeds as time goes on. The mass loss area decreases from 16.9 mm
²
to 6.6 mm
²
as running speed increases from 100 km/h to 500 km/h. It might be much more reasonable to evaluate the pantograph catenary arc duration at different running speeds via the time that the pantograph strip loses the same mass. The results could provide a reference to revise the standard of pantograph and catenary offline duration.