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Time-domain prediction of impact noise from wheel flats based on measured profiles

Time-domain prediction of impact noise from wheel flats based on measured profiles
Time-domain prediction of impact noise from wheel flats based on measured profiles
Railway impact noise is caused by discrete rail or wheel irregularities, such as wheel flats, rail joints, switches and crossings. In order to investigate impact noise generation, a time-domain wheel/rail interaction model is needed to take account of nonlinearities in the contact zone. A nonlinear Hertzian contact spring is commonly used for wheel/rail interaction modelling but this is not sufficient to take account of actual surface defects which may include large geometry variations. A time-domain wheel/rail interaction model with a more detailed numerical non-Hertzian contact is developed here and used with surface roughness profiles from field measurements of a test wheel with a flat. The impact vibration response and noise due to the wheel flat are predicted using the numerical model and found to be in good agreement with the measurements. Moreover, compared with the Hertzian theory, a large improvement is found at high frequencies when using the detailed contact model
0022-460X
3981-3995
Yang, Jiannan
613fc201-b1a7-4b32-b47b-f2a397883585
Thompson, David J.
bca37fd3-d692-4779-b663-5916b01edae5
Yang, Jiannan
613fc201-b1a7-4b32-b47b-f2a397883585
Thompson, David J.
bca37fd3-d692-4779-b663-5916b01edae5

Yang, Jiannan and Thompson, David J. (2014) Time-domain prediction of impact noise from wheel flats based on measured profiles. Journal of Sound and Vibration, 333 (17), 3981-3995. (doi:10.1016/j.jsv.2014.04.026).

Record type: Article

Abstract

Railway impact noise is caused by discrete rail or wheel irregularities, such as wheel flats, rail joints, switches and crossings. In order to investigate impact noise generation, a time-domain wheel/rail interaction model is needed to take account of nonlinearities in the contact zone. A nonlinear Hertzian contact spring is commonly used for wheel/rail interaction modelling but this is not sufficient to take account of actual surface defects which may include large geometry variations. A time-domain wheel/rail interaction model with a more detailed numerical non-Hertzian contact is developed here and used with surface roughness profiles from field measurements of a test wheel with a flat. The impact vibration response and noise due to the wheel flat are predicted using the numerical model and found to be in good agreement with the measurements. Moreover, compared with the Hertzian theory, a large improvement is found at high frequencies when using the detailed contact model

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More information

Accepted/In Press date: 9 April 2014
Published date: 18 August 2014
Organisations: Dynamics Group

Identifiers

Local EPrints ID: 381750
URI: https://eprints.soton.ac.uk/id/eprint/381750
ISSN: 0022-460X
PURE UUID: 76b99610-9abf-4fcc-b921-99432770db70
ORCID for David J. Thompson: ORCID iD orcid.org/0000-0002-7964-5906

Catalogue record

Date deposited: 12 Oct 2015 13:36
Last modified: 03 Dec 2019 01:59

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