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Does the sound radiation of ground significantly contribute to the sound emission of railway lines?

Author

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  • Michel Villot
  • Philippe Jean
  • Catherine Guigou-Carter

Abstract

The sound radiated by the ground vibration generated by trains has been estimated by calculation in a case study and compared to the total sound measured on-site. A 2.5D ground numerical model, calibrated from on-site vibration measurements, has been used to estimate the ground vibration field, from which the ground-borne sound radiated has been estimated using the Rayleigh Integral Method. According to the calculations, the estimated ground-borne sound radiated is dominant at low frequencies (below 125 Hz) and otherwise rather negligible compared to the sound directly emitted by the train/track system. Moreover, a small parametric study performed using a 2D source (vehicle and tracks) model coupled to the same ground model shows that the ground-borne sound radiated is ground dependent. The ground should be taken into account as a separate sound source when dealing with railway sound and should be added to the other known sources (track and vehicle components).

Suggested Citation

  • Michel Villot & Philippe Jean & Catherine Guigou-Carter, 2021. "Does the sound radiation of ground significantly contribute to the sound emission of railway lines?," International Journal of Rail Transportation, Taylor & Francis Journals, vol. 9(6), pages 564-578, November.
    • Handle: RePEc:taf:tjrtxx:v:9:y:2021:i:6:p:564-578
    DOI: 10.1080/23248378.2020.1852449
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