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Spectra of low-frequency ground vibrations generated by high-speed trains on layered ground

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posted on 05.07.2012 by Victor V. Krylov
Increase in speeds of modern railway trains is usually accompanied by higher levels of generated ground vibrations. In the author's earlier paper [V.V Kryloy Applied Acoustics, 44, 149-164 (1995)1, it has been shown that especially large increase in vibration level may occur if train speeds v exceed the velocity of Rayleigh surface waves in the ground c*., i.e., v ) cn Such a situation might arise, for example, with French TGV trains for which speeds over 515 krnlh have been achieved. The present paper investigates the effect of geological layered structure of the ground on ground vibrations generated by high-speed trains. It is shown that, since Rayleigh wave velocities in layered ground are dispersive and normally increase at lower frequencies associated with deeper penetration of surface wqve energy into the ground, the trans- Rayleigh condition v ) cRmay not hold at very low frequencies. This will cause a noticeable reduction in low-frequency components of generated ground vibration spectra. Theoretical results are illustrated by numerically calculated frequency spectra of ground vibrations generated by single axle loads travelling at dffirent speeds and by TGV or Eurostar high-speed trains.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Aeronautical and Automotive Engineering

Citation

KRYLOV, V.V., 1997. Spectra of low-frequency ground vibrations generated by high-speed trains on layered ground. Journal of Low Frequency Noise, Vibration and Active Control, 16 (4), pp. 257 - 270

Publisher

© Multi-Science Publishing

Version

VoR (Version of Record)

Publication date

1997

Notes

This article was published in the serial Journal of Low Frequency Noise and Vibration [© Multi-Science Publishing].

ISSN

2048-4046

Language

en

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