Influence Of Aerodynamic Forces On Current-collection Of High-speed Pantograph

With the rapid development of high-speed railway, more and more people have been paid attention to safe and comfortable rapid advantages. When the train' speed reached to 250km/h and above, aerodynamic created by high-speed flow impact on the train's components, which the influence is increasing, and it account for 75-80% of the total resistance. At the same, it impact on the current collection quality of Pantograph-catenary in high-speed railway. The current collection quality will have a direct impact on the speed of the train moving. And the aerodynamic of pantograph account for 8-14% of the total aerodynamic drag. In order to meet the EMU' s current collection, we should take aerodynamic performance into consideration.This paper which beginning with the point of aerodynamic aim to improve the aerodynamic performance and stability of interaction of Pantograph-catenary. First of all, on the premise of master the basal knowledge of aerodynamic, it's necessary to apply the theoretical knowledge to high-speed pantograph. From numeric theory, calculate the lift force and resistance of pantograph's parts by establishing the value formula of high-speed pantograph, in order to analysis aerodynamic characteristic and research the performance of current-collection.Secondly, use 3D modeling software UG to establish the geometry model of high-speed pantograph. Then import pantograph geomantic model into CFD software STAR-CCM+, and simulate aerodynamic performance of pantograph in open area using turbulence model. Furthermore, discuss the effect of Pantograph-catenary lift force, resistance of pantograph head and arm caused by the air at 350 km/h. The combined simulation software provides method and theoretical research for further parameters study and improving the aerodynamic performance of pantograph.The problems with Current-collection of high-speed pantograph, we can propose reasonable suggestions and measures by numerical computation and simulation. Meanwhile, the method that changes the lift forces by adjusting the different angle of wing in different speed is a best way to meet EMU' s requirement. At the end of the paper, the directions and measures to be improved and studied further are pointed out.