Effects of rail dynamics and friction characteristics on curve squeal
Effects of rail dynamics and friction characteristics on curve squeal
Curve squeal in railway vehicles is an instability mechanism that arises in tight curves under certain running and environmental conditions. In developing a model the most important elements are the characterisation of friction coupled with an accurate representation of the structural dynamics of the wheel. However, the role played by the dynamics of the rail is not fully understood and it is unclear whether this should be included in a model or whether it can be safely neglected. This paper makes use of previously developed time domain and frequency domain curve squeal models to assess whether the presence of the rail and the falling characteristics of the friction force can modify the instability mechanisms and the final response. For this purpose, the time-domain model has been updated to include the rail dynamics in terms of its state space representation in various directions. Frequency domain and time domain analyses results show that falling friction is not the only reason for squeal and rail dynamics can play an important role, especially under constant friction conditions.
1-11
Ding, Bo
06d00a3c-671c-4cab-953c-b9f1c8d8eed9
Squicciarini, Giacomo
c1bdd1f6-a2e8-435c-a924-3e052d3d191e
Thompson, David
bca37fd3-d692-4779-b663-5916b01edae5
3 October 2016
Ding, Bo
06d00a3c-671c-4cab-953c-b9f1c8d8eed9
Squicciarini, Giacomo
c1bdd1f6-a2e8-435c-a924-3e052d3d191e
Thompson, David
bca37fd3-d692-4779-b663-5916b01edae5
Ding, Bo, Squicciarini, Giacomo and Thompson, David
(2016)
Effects of rail dynamics and friction characteristics on curve squeal.
Journal of Physics: Conference Series, 744 (1), .
(doi:10.1088/1742-6596/744/1/012146).
Abstract
Curve squeal in railway vehicles is an instability mechanism that arises in tight curves under certain running and environmental conditions. In developing a model the most important elements are the characterisation of friction coupled with an accurate representation of the structural dynamics of the wheel. However, the role played by the dynamics of the rail is not fully understood and it is unclear whether this should be included in a model or whether it can be safely neglected. This paper makes use of previously developed time domain and frequency domain curve squeal models to assess whether the presence of the rail and the falling characteristics of the friction force can modify the instability mechanisms and the final response. For this purpose, the time-domain model has been updated to include the rail dynamics in terms of its state space representation in various directions. Frequency domain and time domain analyses results show that falling friction is not the only reason for squeal and rail dynamics can play an important role, especially under constant friction conditions.
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Accepted/In Press date: 12 August 2016
e-pub ahead of print date: 1 October 2016
Published date: 3 October 2016
Organisations:
Dynamics Group
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Local EPrints ID: 399587
URI: http://eprints.soton.ac.uk/id/eprint/399587
ISSN: 1742-6588
PURE UUID: 9e2cfabb-6490-482b-b121-c746a3b0e875
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Date deposited: 19 Aug 2016 12:39
Last modified: 15 Mar 2024 05:49
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Author:
Bo Ding
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