Pantograph-catenary contact reliability analysis under crosswind
International Journal of Structural Integrity
ISSN: 1757-9864
Article publication date: 3 August 2021
Issue publication date: 9 August 2021
Abstract
Purpose
This paper aims to establish the relationship between crosswind speed and pantograph-catenary lateral deviation, as well as quantify the influence of crosswind speed and rod size uncertainty on pantograph-catenary contact reliability.
Design/methodology/approach
The closed vector method is used to establish the pantograph-catenary kinematics formula. A new prediction model is proposed by using the bird swarm algorithm to optimize the grey model. The lateral deviation of the pantograph and catenary is predicted via the new model. Then the relationship between the effective length of the rod and operating mileage is inferred by combining the effective length theory with the Gamma process, as well as the pantograph-catenary contact reliability model is established according to reliability theory.
Findings
The results obtained show the impacts of uncertainty design parameters of pantograph rods on pantograph-catenary contact reliability index, and the results at crosswind speed of 0 ms−1 and 5 ms−1 are 5.0630 and 4.1442, respectively. The reliability decreases with the increasing crosswind speed, and can be greater than the reliability calculated for rod size degradation due to long-term use.
Originality/value
Most preceding works on pantograph-catenary contact reliability were based on principles of dynamics, without considering the pantograph-catenary relative motion. This research reveals the law of pantograph-catenary relative motion for uncertainty design parameters and crosswind, and quantifies the reliability from the angle of kinematics.
Keywords
Acknowledgements
The authors would like to acknowledge the partial supports provided by the National Natural Science Foundation of China under Contract No. 51875073, the Scientific Research Project of Education Department of Liaoning Province under Contract No. JDL2019005, the Dalian Science and Technology Innovation Fund Plan under Contract No. 2019J11CY017.
Citation
Li, Y.-H., Cao, Y., Wu, Y.-X., Bai, X.-N. and Mao, J.-W. (2021), "Pantograph-catenary contact reliability analysis under crosswind", International Journal of Structural Integrity, Vol. 12 No. 4, pp. 629-644. https://doi.org/10.1108/IJSI-03-2021-0029
Publisher
:Emerald Publishing Limited
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