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Contributions of contact nonlinearities to wheel/rail noise generation
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.ORCID iD: 0000-0002-2683-1553
2014 (English)In: Proceedings of Forum Acusticum, European Acoustics Association (EAA), 2014Conference paper (Refereed)Text
Abstract [en]

A model for calculation of generation and radiation of railway noise is presented. Thanks to a Green's function formulation, in the time as well as in the frequency domain, not only roughness excitation, but also parametric excitation (due to varying rail receptance along the track) and excitation due to nonlinear effects in the rail/wheel contact region are included in the description. Another advantage of the model is that vibration propagation and decay along the track is an inherent property of the Green's function of the periodically supported rail. The advantages of the model is demonstrated with a calculation example of rail/wheel contact force and noise radiation from the rail for a typical sleeper-supported ballast track. Noise radiation peaks around 1000 Hz. For higher frequencies, parametric excitation and nonlinear effects may contribute significantly to total railway noise radiation.

Place, publisher, year, edition, pages
European Acoustics Association (EAA), 2014.
Keyword [en]
Frequency domain analysis, Green's function, Noise pollution, Nonlinear optics, Radiation effects, Railroad transportation, Railroads, Contact non linearities, Frequency domains, Higher frequencies, Noise radiations, Nonlinear effect, Parametric excitations, Vibration propagation, Wheel/rail noise, Rails
National Category
Applied Mechanics Other Physics Topics
Identifiers
URN: urn:nbn:se:kth:diva-181666ScopusID: 2-s2.0-84953328238ISBN: 9788361402282OAI: oai:DiVA.org:kth-181666DiVA: diva2:912383
Conference
7th Forum Acusticum, FA 2014, 7 September 2014 through 12 September 2014
Note

QC 20160316

Available from: 2016-03-16 Created: 2016-02-02 Last updated: 2016-03-16Bibliographically approved

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Lundberg, Oskar
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ReferencesLink to record
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