Study of pantograph-catenary system dynamic in crosswind environments

Abstract

To study the evolution of the pantograph-catenary system dynamic under crosswind environments, this paper examines the effect of crosswind on the quality of the current collection and explores the wind stability of different longitudinal suspension forms of the catenary system. Firstly, the catenary with different longitudinal suspension forms is established based on the absolute node coordinate formulation, and the initial equilibrium configuration are accurately obtained. Secondly, the pantograph model is derived, and the pantograph-catenary system coupling model is established according to the standard EN 50318:2018 and passed the verification. Then, the random wind speed spectrum of the simulated environment is built based on the Davenport spectrum and is validated. Finally, the pantograph-catenary system dynamic behavior under the crosswind environments is simulated. The results show that the crosswind affects the low-frequency vibration part of the pantograph-catenary system, with the increase in wind speed and the standard deviation of contact force, the worse current collection quality. Different longitudinal suspension forms of catenary systems have various wind stability. Semi-inclined and inclined longitudinal suspension forms have better wind stability, and the maximum reduction of contact force standard deviation is 14.05%, which can effectively improve the current collection quality in crosswind environments.