Effects of pantograph-rigid catenary system parameters on contact wire corrugation

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Journal of Vibration and Shock ›› 2023, Vol. 42 ›› Issue (5) : 122-135.

LI Xianhang1, CHEN Guangxiong1, MEI Guiming2, HE Junhua1, LIU Dayi1, FENG Xiaohang1

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Abstract

A full-size finite element model of a pantograph-rigid catenary system was established, and the normal and tangential motions of the pantograph-rigid catenary system were dynamically coupled by sliding friction. Based on the theory of the friction-induced self-excited vibration causing corrugation, the effects of pantograph-rigid catenary system parameters on the contact wire corrugation were studied by using the complex eigenvalue method. The results show that when the friction coefficient μ≥0.15, the friction-induced self-excited vibration occurs at a frequency ƒ=818.01Hz, and this friction-induced self-excited vibration causes rigid contact wire corrugation. When the friction coefficient μ＜0.15, the contact wire corrugation can be significantly reduced. When the normal contact force F≤110N or the span L=6m, the contact wire corrugation can be effectively alleviated. When the stiffness of the pantograph-head suspension torsion spring K=100N•m/rad, contact wire corrugation can be suppressed.

Key words

contact wire corrugation / friction-induced self-excited vibration / rigid catenary / complex eigenvalue

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LI Xianhang1, CHEN Guangxiong1, MEI Guiming2, HE Junhua1, LIU Dayi1, FENG Xiaohang1. Effects of pantograph-rigid catenary system parameters on contact wire corrugation[J]. Journal of Vibration and Shock, 2023, 42(5): 122-135

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