JOHN ANDREWS john.andrews@nottingham.ac.uk
Professor of Infrastructure Asset Management
A stochastic model for railway track asset management
Andrews, John; Prescott, Darren; De Rozi�res, Florian
Authors
DARREN PRESCOTT Darren.Prescott@nottingham.ac.uk
Assistant Professor
Florian De Rozi�res
Abstract
The determination of the strategy to ensure that the geometry for railway track is kept within acceptable limits, in a cost effective manner, is a complex process. It requires the simultaneous consideration of the activities which govern inspection, maintenance and renewal. In addition to this the geometry degradation process is dependent upon the maintenance history. The condition where the track geometry is shown to have deteriorated to a level where intervention is required can be improved using a tamping machine. Tamping is carried out by a special train which measures the geometry of the rails, predicts the correction needed, lifts the rails to the required position, inserts tines into the ballast either side of the sleepers and packs the ballast such that the correct rail position is attained. Whilst improving the geometry this process has the disadvantage that it also breaks the ballast which accelerates the track geometry degradation and reduces the time between interventions.
This paper describes a modelling process to predict the state of the track geometry given any specified asset management strategy. It is based on the Petri net method and in addition to predicting the track condition over time it can also compute the expected whole life costs. By varying the parameters which govern the inspection, maintenance and renewal of the ballast as the most cost effective means to achieve the required level of performance can be predicted.
Citation
Andrews, J., Prescott, D., & De Rozières, F. (2014). A stochastic model for railway track asset management. Reliability Engineering and System Safety, 130, https://doi.org/10.1016/j.ress.2014.04.021
Journal Article Type | Article |
---|---|
Acceptance Date | Apr 27, 2014 |
Online Publication Date | May 14, 2014 |
Publication Date | Oct 1, 2014 |
Deposit Date | Jul 22, 2016 |
Publicly Available Date | Mar 28, 2024 |
Journal | Reliability Engineering and System Safety |
Electronic ISSN | 0951-8320 |
Publisher | Elsevier |
Peer Reviewed | Peer Reviewed |
Volume | 130 |
DOI | https://doi.org/10.1016/j.ress.2014.04.021 |
Keywords | Railway track ballast; Degradation models; Maintenance models; Asset management; Petri nets |
Public URL | https://nottingham-repository.worktribe.com/output/994132 |
Publisher URL | http://www.sciencedirect.com/science/article/pii/S0951832014000891 |
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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by-nc-nd/4.0
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