An optimal age–usage maintenance strategy containing a failure penalty for application to railway tracks
Artikel i vetenskaplig tidskrift, 2016

Railway track maintenance plays a key role in enhancing the reliability and safety of railway transportation, as it reduces the potential risks of defects and derailments. A railway track degrades over time, due to its cumulative usage (in terms of million gross tons) that results from traffic movements. When the cumulative usage reaches a failure threshold, the railway track breaks and has to be replaced with a new section. Moreover, the infrastructure owner charges the maintenance agent a specific penalty due to traffic disrruption and passenger dissatisfaction. To avoid such costly defects,the railway tracks must be preventively replaced at regular time intervals. In this paper, we propose an optimal bivariate(age–usage) maintenance strategy for railway tracks such that the average long-run maintenance cost per unit time is minimized. The proposed model is applied to 60E1 track on a small part of the Swedish heavy haul line ‘Malmbanan’, and the results are compared with two conventional age-based and usage-based maintenance policies. The results show that the proposed maintenance policy has a substantial potential to reduce the servicing costs of railway track maintenance.

age-based PM

failure penalty

usage-based PM

million gross tons (MGT)

Railway track

Författare

Mahmood Shafiee

Cranfield University

Michael Patriksson

Chalmers, Matematiska vetenskaper, Matematik

Göteborgs universitet

Stefanka Chukova

Victoria University of Wellington

Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit

0954-4097 (ISSN)

Vol. 230 407-417

Drivkrafter

Hållbar utveckling

Styrkeområden

Transport

Ämneskategorier

Beräkningsmatematik

Fundament

Grundläggande vetenskaper

DOI

10.1177/0954409714543337