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AuthorKostovasilis, D.
AuthorThompson, D.J.
AuthorHusseinb, M.F.M.
Available date2020-10-15T10:38:42Z
Publication Date2017
Publication NameJournal of Sound and Vibration
ResourceScopus
URIhttp://dx.doi.org/10.1016/j.jsv.2016.12.033
URIhttp://hdl.handle.net/10576/16459
AbstractThe high frequency dynamic behaviour of railway tracks, in both vertical and lateral directions, strongly affects the generation of rolling noise as well as other phenomena such as rail corrugation. An improved semi-analytical model of a beam on an elastic foundation is introduced that accounts for the coupling of the vertical and lateral vibration. The model includes the effects of cross-section asymmetry, shear deformation, rotational inertia and restrained warping. Consideration is given to the fact that the loads at the rail head, as well as those exerted by the railpads at the rail foot, may not act through the centroid of the section. The response is evaluated for a harmonic load and the solution is obtained in the wavenumber domain. Results are presented as dispersion curves for free and supported rails and are validated with the aid of a Finite Element (FE) and a waveguide finite element (WFE) model. Closed form expressions are derived for the forced response, and validated against the WFE model. Track mobilities and decay rates are presented to assess the potential implications for rolling noise and the influence of the various sources of vertical-lateral coupling. Comparison is also made with measured data. Overall, the model presented performs very well, especially for the lateral vibration, although it does not contain the high frequency cross-section deformation modes. The most significant effects on the response are shown to be the inclusion of torsion and foundation eccentricity, which mainly affect the lateral response.
SponsorThis work has been sponsored by Network Rail and the Engineering and Physical Sciences Research Council under the grant reference 1342762. All data published in this paper are openly available from the University of Southampton repository at: http://dx.doi.org/10.5258/SOTON/404573.
Languageen
PublisherAcademic Press
Subject60E1
Dispersion curve
Frequency-wavenumber domain
Vertical/lateral coupling
Vignole rail
TitleA semi-analytical beam model for the vibration of railway tracks
TypeArticle
Pagination321-337
Volume Number393


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