Focusing of ground vibrations generated by high-speed trains
conference contributionposted on 2014-10-10, 08:38 authored by Victor V. Krylov
If a railway track has a bend, e.g. to provide the possibility of changing direction of train movement, the Rayleigh surface waves generated by high-speed trains under the condition of ground vibration boom may become focused. This results in concentration of their energy along a simple caustic line at one side of the track and in the corresponding increase in ground vibration amplitudes. The effect of focusing of Rayleigh waves may occur also if a train moves along a straight line with acceleration a and its current speed v(t) is higher than Rayleigh wave velocity in the ground. In the present paper, both the abovementioned focusing mechanisms are investigated in detail using the Green’s function formalism and the expressions for space-time distributions of wheel-axle loads that take into account either track curvature or train acceleration. It is shown that in both these cases the effect of focusing can result in noticeable increase in generated ground vibrations. The obtained results are illustrated by numerical calculations.
- Aeronautical, Automotive, Chemical and Materials Engineering
- Aeronautical and Automotive Engineering
Published inInternational Conference on Noise and Vibration Engineering (ISMA 2014) Proceedings of the International Conference on Noise and Vibration Engineering (ISMA 2014)
Pages2007 - 2016
CitationKRYLOV, V.V., 2014. Focusing of ground vibrations generated by high-speed trains. IN: Sas, P., Moens, D. and Denayer, H. (eds.) Proceedings of the International Conference on Noise and Vibration Engineering (ISMA 2014), Leuven, Belgium, 15-17 September 2014, pp. 2007 - 2016.
- VoR (Version of Record)
Publisher statementThis work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/
NotesThis is a conference paper. The ISMA website is at: http://www.isma-isaac.be/