Modeling of Sliding Electrical Contact Friction under Wave Loading
Chen Zhonghua1, Dang Wei1, Shi Guang1, Wang Xili1, Liu Fusheng2
1. Faculty of Electrical and Control Engineering Liaoning Technical University Huludao 125105 China; 2. The East of Inner Monggol Electrical Power Company Kezuozhongqi Power Supply Company Tongliao 028000 China
Abstract During the sliding electrical contact of the pantograph catenary, the wear of the pantograph slide is intensified, which greatly shortens the service life of the pantograph slide. Since the wear problem of the pantograph slide is directly related to the sliding friction, it is important to study the sliding friction of the slide. In this paper, the Coulomb+Viscous static friction model was used to the model of sliding electrical contact friction. A new friction model was established by modifying the viscous friction part of the original friction model and introducing the factors, such as the contact current, contact force, and their fluctuation amplitude and fluctuation frequency. The experiment was carried out by self-developed sliding electrical contact experimental machine. Then the parameters of the new friction model were identified by particle swarm optimization and Matlab, and the improved friction model was verified. From the fitting effect diagram and residual plot, the improved friction model could reasonably predict the sliding electrical contact sliding friction force of pantograph catenary under the fluctuating load.
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2019, Vol. 34 
