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An Explicit Integration Finite Element Method for Impact Noise Generation at a Squat

  • Z. Yang
  • Z. Li
  • R. P. B. J. Dollevoet
Part of the Notes on Numerical Fluid Mechanics and Multidisciplinary Design book series (NNFM, volume 126)

Abstract

This paper presents a full finite element (FE) interaction model of wheel-track to study the wheel-rail impact noise caused by a squat. The wheel, the rail and some other track components are modeled with finite elements in three dimensions, where necessary and appropriate. Realistic contact geometry, including geometric irregularity (squat) in the contact surfaces is considered. The integration is performed in the time domain with an explicit central difference scheme. For convergence, the Courant time step condition is enforced, which, together with the detailed modeling of the structure and continuum of the wheel-track system, effectively guarantees that vibration frequency of 10 kHz or higher is reproduced. By making use of the calculated velocities and pressures on the vibrating surfaces, the boundary element method (BEM) based on Helmholtz equation is adopted to transform the vibrations of the track into acoustic signals.

Keywords

Contact Force Boundary Element Method Acoustic Signal Wavelet Power Spectrum Impact Noise 
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

  • Z. Yang
    • 1
  • Z. Li
    • 1
  • R. P. B. J. Dollevoet
    • 1
  1. 1.Section of Road and Railway Engineering, Faculty of Civil Engineering and GeosciencesDelft University of TechnologyDelftThe Netherlands

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