A Model for Evaluating Long-Term Support Degradation at Railway Switches

Ilaria Grossoni; Yann Bezin; Louis Le Pen; Geoff Watson; Dimitrios Kostovasilis

doi:10.1007/978-3-030-38077-9_45

A Model for Evaluating Long-Term Support Degradation at Railway Switches

Ilaria Grossoni, Yann Bezin, Louis Le Pen, Geoff Watson, Dimitrios Kostovasilis

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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.

Original language	English
Title of host publication	Advances in Dynamics of Vehicles on Roads and Tracks
Subtitle of host publication	Proceedings of the 26th Symposium of the International Association of Vehicle System Dynamics, IAVSD 2019, August 12-16, 2019, Gothenburg, Sweden
Editors	Matthijs Klomp, Fredrik Bruzelius, Jens Nielsen, Angela Hillemyr
Publisher	Springer International Publishing AG
Pages	382-389
Number of pages	8
Edition	1
ISBN (Electronic)	9783030380779
ISBN (Print)	9783030380762, 3030380769
DOIs	https://doi.org/10.1007/978-3-030-38077-9_45
Publication status	Published - 14 Feb 2020
Event	26th IAVSD International Symposium on Dynamics of Vehicles on Roads and Tracks - Gothenburg, Sweden Duration: 12 Aug 2019 → 16 Aug 2019 Conference number: 26 https://iavsd2019.se/

Publication series

Name	Lecture Notes in Mechanical Engineering
ISSN (Print)	2195-4356
ISSN (Electronic)	2195-4364

Conference

Conference	26th IAVSD International Symposium on Dynamics of Vehicles on Roads and Tracks
Abbreviated title	IAVSD 2019
Country/Territory	Sweden
City	Gothenburg
Period	12/08/19 → 16/08/19
Internet address	https://iavsd2019.se/

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10.1007/978-3-030-38077-9_45Licence: Unspecified

Cite this

Grossoni, I., Bezin, Y., Le Pen, L., Watson, G., & Kostovasilis, D. (2020). A Model for Evaluating Long-Term Support Degradation at Railway Switches. In M. Klomp, F. Bruzelius, J. Nielsen, & A. Hillemyr (Eds.), Advances in Dynamics of Vehicles on Roads and Tracks: Proceedings of the 26th Symposium of the International Association of Vehicle System Dynamics, IAVSD 2019, August 12-16, 2019, Gothenburg, Sweden (1 ed., pp. 382-389). (Lecture Notes in Mechanical Engineering). Springer International Publishing AG. https://doi.org/10.1007/978-3-030-38077-9_45

Grossoni, Ilaria ; Bezin, Yann ; Le Pen, Louis et al. / A Model for Evaluating Long-Term Support Degradation at Railway Switches. Advances in Dynamics of Vehicles on Roads and Tracks: Proceedings of the 26th Symposium of the International Association of Vehicle System Dynamics, IAVSD 2019, August 12-16, 2019, Gothenburg, Sweden. editor / Matthijs Klomp ; Fredrik Bruzelius ; Jens Nielsen ; Angela Hillemyr. 1. ed. Springer International Publishing AG, 2020. pp. 382-389 (Lecture Notes in Mechanical Engineering).

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title = "A Model for Evaluating Long-Term Support Degradation at Railway Switches",

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.",

keywords = "Settlement, Sleeper deflections, Switch panel, Top level measurements, Trackbed stiffness, TRC, USPs, Vehicle-track interaction, Wheel-rail contact",

author = "Ilaria Grossoni and Yann Bezin and {Le Pen}, Louis and Geoff Watson and Dimitrios Kostovasilis",

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booktitle = "Advances in Dynamics of Vehicles on Roads and Tracks",

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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 M Klomp, F Bruzelius, J Nielsen & A Hillemyr (eds), Advances in Dynamics of Vehicles on Roads and Tracks: Proceedings of the 26th Symposium of the International Association of Vehicle System Dynamics, IAVSD 2019, August 12-16, 2019, Gothenburg, Sweden. 1 edn, Lecture Notes in Mechanical Engineering, Springer International Publishing AG, pp. 382-389, 26th IAVSD International Symposium on Dynamics of Vehicles on Roads and Tracks, Gothenburg, Sweden, 12/08/19. https://doi.org/10.1007/978-3-030-38077-9_45

A Model for Evaluating Long-Term Support Degradation at Railway Switches. / Grossoni, Ilaria; Bezin, Yann; Le Pen, Louis et al.

Advances in Dynamics of Vehicles on Roads and Tracks: Proceedings of the 26th Symposium of the International Association of Vehicle System Dynamics, IAVSD 2019, August 12-16, 2019, Gothenburg, Sweden. ed. / Matthijs Klomp; Fredrik Bruzelius; Jens Nielsen; Angela Hillemyr. 1. ed. Springer International Publishing AG, 2020. p. 382-389 (Lecture Notes in Mechanical Engineering).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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N2 - 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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Grossoni I, Bezin Y, Le Pen L, Watson G, Kostovasilis D. A Model for Evaluating Long-Term Support Degradation at Railway Switches. In Klomp M, Bruzelius F, Nielsen J, Hillemyr A, editors, Advances in Dynamics of Vehicles on Roads and Tracks: Proceedings of the 26th Symposium of the International Association of Vehicle System Dynamics, IAVSD 2019, August 12-16, 2019, Gothenburg, Sweden. 1 ed. Springer International Publishing AG. 2020. p. 382-389. (Lecture Notes in Mechanical Engineering). Epub 2020 Feb 13. doi: 10.1007/978-3-030-38077-9_45

A Model for Evaluating Long-Term Support Degradation at Railway Switches

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