Citation

Wen D, Wang F, Shi J, Ren S. China Saf. Sci. J. 2022; 32(6): 87-94.

Copyright

(Copyright © 2022, China Occupational Safety and Health Association, Publisher Gai Xue bao)

DOI

10.16265/j.cnki.issn1003-3033.2022.06.1896

PMID

unavailable

Abstract

In order to ensure operation safety of heavy haul railways in long ramp curve sections, safety performance of long marshalling heavy haul trains in such sections under braking mode was studied with coupler swing angle, derailment coefficient, wheel rail lateral force, wheel load reduction rate, wheel surface fatigue index and wheel rail wear index as evaluation indicators. And a train-line dynamic model was established and verified based on measured data. The results show that when coupler force reaches the maximum, the train may not be in curve sections. For 1+1 marshalling trains, the maximum coupler force appears at the part of central locomotive. However, for the case of 2+0 trains, when it starts braking 900 m away from the intersection of line and spiral, the maximum coupler force reaches the maximum value, which occurs at the 62nd coupler. Moreover, the curve radius shall not be less than 1 200 m, or no less than 1 000 m under difficult conditions, while length of transition curve no less than 150 m. © 2022 China Safety Science Journal. All rights reserved.

Language: zh