Validation of a simulation model for mixed traffic on a Swedish double-track railway line
2009 (English)In: Proceedings of Railway Engineering 10th International Conference and Exhibition / [ed] Ford, M.C., 2009Conference paper (Refereed)
Simulation is an appropriate method of modelling complex railway operation systems. In a simulation tool it is possible to model interactions between trains and the delay propagation that follows on conflicts. This study describes a process for calibrating/validating a simulation model set up in the commercial simulation tool RailSys.
Response Surface Methodology is applied for a simultaneously calibration of seven factors. Latin Hypercubes are used as the experimental design since they support complex response surface metamodels.
The simulation model’s ability to react accurately to different operational conditions is tested. Two different traffic mixes are modelled and the validation is performed on a significantly different delay level (magnitude of disturbance).
The results show that it is possible to calibrate the model merely by adjusting the chosen factors and that these factors can compensate for simplifications made when the model was being set up. Simulated responses (mean and standard deviation measures) were compared to the real outcome and the relative differences were 2-19%. The validation generally showed greater differences.
Place, publisher, year, edition, pages
Validation, mixed railway traffic, simulation, double-track, railway operation
Research subject Järnvägsgruppen - Kapacitet
IdentifiersURN: urn:nbn:se:kth:diva-12724OAI: oai:DiVA.org:kth-12724DiVA: diva2:318283
Railway Engineering 10th International Conference and Exhibition, London
ProjectsFramtida infrastruktur och kvalitet i tågföring