Research on Current-Carrying Friction Modeling of Pantograph-Catenary under Fluctuation Contact Pressure

The current-carrying friction characteristics of the electrified railway pantograph catenary system seriously affect the life of the pantograph slider and the catenary wire and the current quality of the electric locomotive. In this paper, the self-developed sliding experimental machine was used to simulate the contact condition of pantograph and catenary in high-speed railway, and the research on the current-carrying friction modeling of pantograph-catenary under fluctuation contact pressure was carried out. The characteristics of the friction coefficient related to contact pressure fluctuation frequency and amplitude and current at different speeds are obtained by the experimental data. The models of friction coefficient related to fluctuation contact pressure and current are established, and combine them with the speed-related Stribeck friction model to achieve the friction coefficient correction in the friction model. Finally, the current-carrying friction model related to speed, fluctuation contact pressure and current were established. The unknown parameters of the model was identified by the Levenberg-Marquardt and Universal Global Optimization, and the validity of the model was verified by the experimental data, which provides a reference for the prediction of the friction of pantograph-catenary system and research on friction and wear properties. © 2019, Electrical Technology Press Co. Ltd. All right reserved.