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Evaluating railway track support stiffness from trackside measurements in the absence of wheel load data

Evaluating railway track support stiffness from trackside measurements in the absence of wheel load data
Evaluating railway track support stiffness from trackside measurements in the absence of wheel load data
It is generally accepted that track support stiffness is a major factor controlling rates of track geometry deterioration, particularly where the track support stiffness changes abruptly. There is, therefore, considerable potential benefit in being able to quantify and detect changes in the track support stiffness. In recent years, trackside techniques using various types of transducer have been developed to determine track deflections as trains pass. However, deducing the track support stiffness from these measurements requires assumptions to be made concerning train loading and track behaviour, and scope for different interpretations remains. For example, loads from moving trains vary dynamically and it is not usually feasible to measure their exact values at any given point along the track. This paper presents new methods of analysis, which can be applied to frequency spectra of track displacement, velocity or acceleration generated as trains pass to calculate the track support stiffness for trains of known axle intervals, without needing to know the actual loads applied. The approach is demonstrated with reference to theory and measured data from a range of field sites.
University of Southampton
Le Pen, Louis
4a38e256-d113-4bba-b0d4-32d41995928a
Milne, D.
96efcc03-ba68-4870-819d-9b5433b208c7
Thompson, David
bca37fd3-d692-4779-b663-5916b01edae5
Powrie, William
600c3f02-00f8-4486-ae4b-b4fc8ec77c3c
Le Pen, Louis
4a38e256-d113-4bba-b0d4-32d41995928a
Milne, D.
96efcc03-ba68-4870-819d-9b5433b208c7
Thompson, David
bca37fd3-d692-4779-b663-5916b01edae5
Powrie, William
600c3f02-00f8-4486-ae4b-b4fc8ec77c3c

Le Pen, Louis, Milne, D., Thompson, David and Powrie, William (2016) Evaluating railway track support stiffness from trackside measurements in the absence of wheel load data. University of Southampton doi:10.5258/SOTON/391563 [Dataset]

Record type: Dataset

Abstract

It is generally accepted that track support stiffness is a major factor controlling rates of track geometry deterioration, particularly where the track support stiffness changes abruptly. There is, therefore, considerable potential benefit in being able to quantify and detect changes in the track support stiffness. In recent years, trackside techniques using various types of transducer have been developed to determine track deflections as trains pass. However, deducing the track support stiffness from these measurements requires assumptions to be made concerning train loading and track behaviour, and scope for different interpretations remains. For example, loads from moving trains vary dynamically and it is not usually feasible to measure their exact values at any given point along the track. This paper presents new methods of analysis, which can be applied to frequency spectra of track displacement, velocity or acceleration generated as trains pass to calculate the track support stiffness for trains of known axle intervals, without needing to know the actual loads applied. The approach is demonstrated with reference to theory and measured data from a range of field sites.

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More information

Published date: 2016
Organisations: Infrastructure Group, Dynamics Group, Faculty Hub
Projects:
Railway Track for the 21st Century
Funded by: UNSPECIFIED (EP/H044949/1)
1 June 2010 to 31 May 2015

Identifiers

Local EPrints ID: 392657
URI: http://eprints.soton.ac.uk/id/eprint/392657
PURE UUID: d74339e5-eade-4656-919f-1a698c936d9d
ORCID for Louis Le Pen: ORCID iD orcid.org/0000-0002-4362-3895
ORCID for David Thompson: ORCID iD orcid.org/0000-0002-7964-5906
ORCID for William Powrie: ORCID iD orcid.org/0000-0002-2271-0826

Catalogue record

Date deposited: 18 Apr 2016 15:15
Last modified: 28 Jan 2022 02:39

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Contributors

Creator: Louis Le Pen ORCID iD
Creator: D. Milne
Creator: David Thompson ORCID iD
Creator: William Powrie ORCID iD

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