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An optimal age–usage maintenance strategy containing a failure penalty for application to railway tracks

Mahmood Shafiee ; Michael Patriksson (Institutionen för matematiska vetenskaper, matematik) ; Stefanka Chukova
Proceedings of the Institution of mechanical engineers. Part F, journal of rail and rapid transit (0954-4097). Vol. 230 (2016), 2, p. 407-417.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: Railway track, million gross tons (MGT), age-based PM, usage-based PM, failure penalty



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Denna post skapades 2016-01-12. Senast ändrad 2016-02-24.
CPL Pubid: 230439

 

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Institutioner (Chalmers)

Institutionen för matematiska vetenskaper, matematik (2005-2016)

Ämnesområden

Transport
Hållbar utveckling
Optimeringslära, systemteori

Chalmers infrastruktur