Unsteady aerodynamic characteristics analysis of high speed pantograph

To ensure the good contact characteristics of pantograph and catenary of high speed train,as to the problem that pantograph will oscillate under the interference of strong air turbulence,the unsteady uplift and resistance characteristics of high speed pantograph in forward and backward movement are studied with Detached Eddy Simulation(DES) method.The results show that the forward and backward movements have large different effects on aerodynamic characteristics of pantograph,particularly on the uplift fluctuation of pantograph and its slider.The uplift fluctuations of pantograph and its slider in backward movement are larger than that in forward movement.However,forward and backward movements have little effect on the aerodynamic drag and fluctuations of pantograph and its slider.