Abstract
A railway switch is characterised by movable parts, discontinuities in rail geometry and non-uniformities in trackbed stiffness. This work aims to assess the performance of railway switches considering long-term degradation of trackbed support with trafficking. A vehicle-track interaction model capable of reproducing the longitudinal variation in support stiffness and changes in contact condition through the switch panel is used. Site measurements of bearer deflection at a selected S&C are used to back-calculate a trackbed stiffness and initialise dynamic simulations to determine wheel-rail and trackbed contact forces. The calculated trackbed forces are used as an input in an iterative process to estimate the evolution of long-term rail top level and irregularity growth. The model results are compared with measured rail irregularity growth and the model is shown to predict similar trends. Model results and measurements show that higher rates of track geometry degradation occur around the load transfer area. The use of Under Sleeper Pads is found to decrease differential settlement within the panel.
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References
Cornish, A., et al.: Monitoring of strain of in-service railway switch rails through field experimentation. Part F: J. Rail Rapid Transit 230(5), 1429–1439 (2016)
Nicklisch, D., et al.: Geometry and stiffness optimization for switches and crossings, and simulation of material degradation. Part F: J. Rail Rapid Transit 224, 279–292 (2010)
Le Pen, L., et al.: Behaviour of under sleeper pads at switches and crossings – Field measurements. Part F: J. Rail Rapid Transit. 232(4), 1049–1063 (2018)
Grossoni, I., et al.: The role of support stiffness in turnouts: comparison of vehicle-track interaction models against field measurements. Submitted in an International Publication
Auer, F., et al.: Under sleeper pads in track – the UIC project. Eur. Railw. Rev. 19 (2013)
DIN, Deutsche Norm 45673: Resilient elements used in railway tracks - Part 6: laboratory test procedures for under-sleeper pads of concrete sleepers. German Institute for Standardization, Berlin (2013)
Le Pen, L., et al.: Evaluating railway track support stiffness from trackside measurements in the absence of wheel load data. Can. Geotech. J. 53(7), 1156–1166 (2016)
Bowness, D., et al.: Monitoring the dynamic displacements of railway track. Proc. Inst. Mech. Eng. Part F: J. Rail Rapid Transit 221(1), 13–22 (2007)
Lamas-Lopez, F., et al.: Assessment of integration method for displacement determination using field accelerometer and geophone data. J. Zhejiang Univ. Sci. A 18(7), 553–566 (2017)
Le Pen, L., et al.: The behaviour of railway level crossings: insights through field monitoring. Transp. Geotech. 1(4), 201–213 (2014)
Grossoni, I., Bezin, Y., Neves, S.: Optimisation of support stiffness at railway crossings. Veh. Syst. Dyn. 56(7), 1072–1096 (2018)
Grossoni, I., Andrade, A.R., Bezin, Y., Neves, S.: The role of track stiffness and its spatial variability on long-term track quality deterioration. Proc. Inst. Mech. Eng. Part F: J. Rail Rapid Transit 233(1), 16–32 (2019)
In2Rail: D3.3: evaluation of optimized track systems (2017)
Nielsen, J.C., et al.: Railway track geometry degradation due to differential settlement of ballast/subgrade – numerical prediction by an iterative procedure. J. Sound Vib. 412, 441–456 (2018)
British Railways Board: RT/CE/C/038: track recording handbook. London (1996)
Acknowledgement
This work is funded by the EPSRC project Track2Future (grant no. EP/M025276/1).
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Grossoni, I., Bezin, Y., Le Pen, L., Watson, G., Kostovasilis, D. (2020). A Model for Evaluating Long-Term Support Degradation at Railway Switches. In: Klomp, M., Bruzelius, F., Nielsen, J., Hillemyr, A. (eds) Advances in Dynamics of Vehicles on Roads and Tracks. IAVSD 2019. Lecture Notes in Mechanical Engineering. Springer, Cham. https://doi.org/10.1007/978-3-030-38077-9_45
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DOI: https://doi.org/10.1007/978-3-030-38077-9_45
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