An explicit integration finite element method for impact noise generation at squat

An explicit integration finite element method for impact noise generation at squat

Yang, Z.
Li, Z.
Dollevoet, R.P.B.J.

Civil Engineering and Geosciences

Structural Engineering

2013-09-09

This paper presents a full finite element (FE) interaction model of wheel-track to study the wheel-rail impact noise caused by 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 structural 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 vibration of the track into acoustic signal.

http://resolver.tudelft.nl/uuid:17530165-6501-4dbd-82a0-64a12f1f5f64

IWRN11: 11th International Workshop on Railway Noise, Uddevalla, Sweden, 9-13 September 2013

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conference paper

(c) 2013 The Author(s)