Krylov Soil Dyn and Earthquake Eng 2017 - postprint.pdf (1.12 MB)

Focusing of ground vibrations generated by high-speed trains travelling at trans-Rayleigh speeds

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journal contribution
posted on 14.07.2017, 12:39 by Victor V. Krylov
In the present paper, the effects of focusing of ground vibrations generated by high speed trains travelling at trans-Rayleigh speeds, i.e. under the condition of ground vibration boom, are considered theoretically. These effects are similar to the effects of focusing of sound waves radiated by supersonic aircraft. In particular, 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 above-mentioned focusing mechanisms are investigated in detail using the Green's function formalism and the expressions for space-time distributions of track-train-induced dynamic forces 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.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Aeronautical and Automotive Engineering

Published in

Soil Dynamics and Earthquake Engineering

Volume

100

Pages

389 - 395

Citation

KRYLOV, V.V., 2017. Focusing of ground vibrations generated by high-speed trains travelling at trans-Rayleigh speeds. Soil Dynamics and Earthquake Engineering, 100, pp. 389-395.

Publisher

© Elsevier

Version

AM (Accepted Manuscript)

Publisher statement

This 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/

Acceptance date

19/06/2017

Publication date

2017-06-27

Notes

This paper was accepted for publication in the journal Soil Dynamics and Earthquake Engineering and the definitive published version is available at http://dx.doi.org/10.1016/j.soildyn.2017.06.015

ISSN

0267-7261

Language

en

Location

United Kingdom

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