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Experimental Characterization of the Vibro-Acoustic Behaviour of a Switch

  • B. FaureEmail author
  • E. Bongini
  • A. Renoncourt
  • A. Pouzet
Conference paper
Part of the Notes on Numerical Fluid Mechanics and Multidisciplinary Design book series (NNFM, volume 126)

Abstract

The work presented in this paper is part of the SNCF project BPS (noise from singular points), in which the noise emitted by steel bridges, joints and switches are investigated. Switches and crossings are numerous in urban inhabited areas. From a dynamic point of view, the switch is a complex track component where many wheel/track interaction phenomena are combined. In this complex physical context, the objective of the measurement campaign presented in this paper is to identify and characterize the sources distributed along a specific switch that contribute to the radiated noise. The measurements were performed in December 2012 on a switch (and also on a reference section) crossed by mixed traffic, equipped with accelerometers (for track and ground-borne vibration) and microphones. Compared to the reference section, the track characterisation by impact hammer excitation shows a lower stiffness under the crossing nose and a higher stiffness in the 150-500 Hz frequency range under the switch rail. The amplification due to the wooden sleepers is responsible for a rolling noise increase in the same frequency range. The crossing nose and the insulated joint are impulsive sources with a given power. For the pass-bys generating a high noise level at the reference site, their respective noise contributions are negligible.

Keywords

Reference Section Steel Bridge Mixed Traffic Impulsive Source Track Section 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • B. Faure
    • 1
    Email author
  • E. Bongini
    • 1
  • A. Renoncourt
    • 1
  • A. Pouzet
    • 2
  1. 1.SNCF Innovation & Research DepartmentParis Cedex 12France
  2. 2.SNCF Railway Test AgencySaint-DenisFrance

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