Pantograph-catenary contact reliability analysis under crosswind
| Autor: | Jia-Wei Mao, Xiao-Ning Bai, Yang Cao, Yong-Hua Li, Yong-Xin Wu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
0209 industrial biotechnology
business.industry Mechanical Engineering Gamma process Swarm behaviour 02 engineering and technology Kinematics Structural engineering Rod 020901 industrial engineering & automation Mechanics of Materials Catenary 0202 electrical engineering electronic engineering information engineering Pantograph 020201 artificial intelligence & image processing business Reliability (statistics) Civil and Structural Engineering Crosswind Mathematics |
| Zdroj: | International Journal of Structural Integrity. 12:629-644 |
| ISSN: | 1757-9864 |
| DOI: | 10.1108/ijsi-03-2021-0029 |
| Popis: | PurposeThis 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/approachThe 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.FindingsThe 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/valueMost 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|