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 and reliability. Track asset management support tools are used to plan and schedule a variety of maintenance activities, with tamping and stoneblowing being the primary activities for geometry maintenance. No management tools seen in the literature consider the influences of weather on the scheduling and delivery of maintenance. This paper describes a Petri net modelling approach to railway track asset management. This is demonstrated to be a highly flexible method able to capture the complexities of degradation, inspection, and maintenance, and predict the evolution of track geometry quality over time. Different maintenance strategies are tested, varying the degradation thresholds, inspection intervals, policy decisions, and maintenance response times. Excessively hot weather is introduced as an inhibiting factor for all maintenance activities, resulting in extended periods where interventions are delayed. Simulation results show that frequent inspection and timely maintenance scheduling strategies could be followed to attain a highly performing and resilient track system. This asset management support tool could be added to the suite used by the rail industry, providing guidance on maintenance policy through a summer season where heatwave disruptions are expected.

夏季气温升高是铁路网络的一个破坏因素。由于在热膨胀力的作用下轨道可能会弯曲，因此在热浪期间必须推迟几何维护，从而导致网络可用性和可靠性整体下降。跟踪资产管理支持工具用于计划和安排各种维护活动，捣固和吹石是几何维护的主要活动。文献中没有管理工具考虑天气对维护计划和交付的影响。本文介绍了一种用于铁路资产管理的Petri网建模方法。事实证明，这是一种高度灵活的方法，能够捕获退化，检查和维护的复杂性，并预测轨道几何图形质量随时间的变化。测试了不同的维护策略，更改了退化阈值，检查间隔，策略决策和维护响应时间。过度炎热的天气成为所有维护活动的阻碍因素，导致干预时间延长。仿真结果表明，可以遵循频繁检查和及时维护的计划策略，以实现高性能和弹性的跟踪系统。可以将该资产管理支持工具添加到铁路行业使用的套件中，从而在整个夏季都会发生热浪干扰的夏季提供维护政策指导。过度炎热的天气成为所有维护活动的阻碍因素，导致干预时间延长。仿真结果表明，可以遵循频繁检查和及时维护的计划策略，以实现高性能和弹性的跟踪系统。可以将该资产管理支持工具添加到铁路行业使用的套件中，从而在整个夏季都会发生热浪干扰的夏季提供维护政策指导。过度炎热的天气成为所有维护活动的阻碍因素，导致干预时间延长。仿真结果表明，可以遵循频繁检查和及时维护的计划策略，以实现高性能和弹性的跟踪系统。可以将该资产管理支持工具添加到铁路行业使用的套件中，从而在整个夏季都会发生热浪干扰的夏季提供维护政策指导。