All Outputs (9)

Railway track availability modelling with opportunistic maintenance practice (2021)
Journal Article
Davies, B., & Andrews, J. (2022). Railway track availability modelling with opportunistic maintenance practice. Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 236(8), 907-919. https://doi.org/10.1177/09544097211047663

The geometry of railway track must be maintained within certain standards in order to provide a highly available network, as well as good ride comfort and safety for all rail users. Modelling is well utilised as part of asset management tools in expl... Read More about Railway track availability modelling with opportunistic maintenance practice.

Incorporating defect specific condition indicators in a bridge life cycle analysis (2021)
Journal Article
Calvert, G., Neves, L., Andrews, J., & Hamer, M. (2021). Incorporating defect specific condition indicators in a bridge life cycle analysis. Engineering Structures, 246, Article 113003. https://doi.org/10.1016/j.engstruct.2021.113003

Bridges are critical assets for the safe, reliable and functional operation of transportation networks. Infrastructure asset managers are responsible for ensuring that these bridges adhere to rigorous safety standards using the finite resources avail... Read More about Incorporating defect specific condition indicators in a bridge life cycle analysis.

A mathematical programming model to select maintenance strategies in railway networks (2021)
Journal Article
Fecarotti, C., Andrews, J., & Pesenti, R. (2021). A mathematical programming model to select maintenance strategies in railway networks. Reliability Engineering and System Safety, 216, Article 107940. https://doi.org/10.1016/j.ress.2021.107940

This paper presents a nonlinear integer programming model to support the selection of maintenance strategies to implement on different segments of a railway network. Strategies are selected which collectively minimise the impact of sections’ conditio... Read More about A mathematical programming model to select maintenance strategies in railway networks.

Modelling cycle for simulation digital twins (2021)
Journal Article
Reed, S., Löfstrand, M., & Andrews, J. (2021). Modelling cycle for simulation digital twins. Manufacturing Letters, 28, 54-58. https://doi.org/10.1016/j.mfglet.2021.04.004

Digital twins (DT) form part of the Industry 4.0 revolution within manufacturing and related industries. A DT is a digital model (DM) of a real system that features continuous and automated synchronisation and feedback of optimisations between the re... Read More about Modelling cycle for simulation digital twins.

An alternative approach to railway asset management value analysis: application to a UK railway corridor (2021)
Journal Article
Litherland, J., Calvert, G., Andrews, J., Modhara, S., & Kirwan, A. (2021). An alternative approach to railway asset management value analysis: application to a UK railway corridor. Infrastructure Asset Management, 8(2), 85-97. https://doi.org/10.1680/jinam.21.00003

Railway networks are complex systems and the management of such systems is a challenging task for railway asset managers. It is their responsibility to ensure that the network delivers the highest level of performance for all stakeholders, whilst adh... Read More about An alternative approach to railway asset management value analysis: application to a UK railway corridor.

An alternative approach to railway asset management value analysis: framework development (2021)
Journal Article
Litherland, J., Calvert, G., Andrews, J., Modhara, S., & Kirwan, A. (2021). An alternative approach to railway asset management value analysis: framework development. Infrastructure Asset Management, 8(2), 75-84. https://doi.org/10.1680/jinam.20.00002

The management of a diverse asset portfolio is a demanding task for railway asset managers. They must ensure that the network delivers a high level of performance for customers and adheres to safety limits. Reliability, availability, maintainability... Read More about An alternative approach to railway asset management value analysis: framework development.

Dynamic Reliability Assessment of PEM Fuel Cell Systems (2021)
Journal Article
Vasilyev, A., Andrews, J., Dunnet, S., & Jackson, L. (2021). Dynamic Reliability Assessment of PEM Fuel Cell Systems. Reliability Engineering and System Safety, 210, Article 107539. https://doi.org/10.1016/j.ress.2021.107539

In this paper, a novel model for the dynamic reliability analysis of a polymer electrolyte membrane fuel cell system is developed to account for multi-state dynamics and ageing. The modelling approach involves the combination of physical and stochast... Read More about Dynamic Reliability Assessment of PEM Fuel Cell Systems.

Modelling stochastic behaviour in simulation digital twins through neural nets (2021)
Journal Article
Reed, S., Löfstrand, M., & Andrews, J. (2022). Modelling stochastic behaviour in simulation digital twins through neural nets. Journal of Simulation, 16(5), 512-525. https://doi.org/10.1080/17477778.2021.1874844

Discrete event simulation (DES) is a widely used technique for modelling systems where state changes occur at discrete points in time. Stochastic behaviour is represented through random variables associated with probability distributions, from which... Read More about Modelling stochastic behaviour in simulation digital twins through neural nets.

The impact of summer heatwaves on railway track geometry maintenance (2021)
Journal Article
Davies, B., & Andrews, J. (2021). The impact of summer heatwaves on railway track geometry maintenance. Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 235(9), 1158-1171. https://doi.org/10.1177/0954409720984292

Elevated summer temperatures are a disrupting factor on the rail network. Due to the risk of a track buckling under thermal expansion forces, geometry maintenance must be delayed during heatwaves, leading to an overall decreased network availability... Read More about The impact of summer heatwaves on railway track geometry maintenance.