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.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Thompson, D.J., Jones, C.J.C.: A review of the modelling of wheel/rail noise generation. Journal of Sound and Vibration 231(3), 519–536 (2000)
Vér, I.L., Ventres, C.S., Myles, M.M.: Wheel/rail noise—part III: impact noise generation by wheel and rail discontinuities. Journal of Sound and Vibration 46(3), 395–417 (1976)
Remington, P.J.: Wheel/rail squeal and impact noise: What do we know? What don’t we know? Where do we go from here? Journal of Sound and Vibration 116(2), 339–353 (1987)
Newton, S.G., Clark, R.A.: An investigation into the dynamic effects on the track of wheelflats on railway vehicles. Journal of Mechanical Engineering Science 21(4), 287–297 (1979)
Wu, T.X., Thompson, D.J.: A hybrid model for the noise generation due to railway wheel flats. Journal of Sound and Vibration 251(1), 115–139 (2002)
Pieringer, A., Kropp, W., Thompson, D.J.: Investigation of the dynamic contact filter effect in vertical wheel/rail interaction using a 2D and a 3D non-Hertzian contact model. Wear 271(1-2), 328–338 (2011)
Li, Z., Zhao, X., Dollevoet, R.P.B.J., Molodova, M.: Differential wear and plastic deformation as causes of squat at track local stiffness change combined with other track short defects. Vehicle System Dynamics 46, 237–246 (2008)
Molodova, M., Li, Z., Dollevoet, R.P.B.J.: Axle box acceleration: Measurement and simulation for detection of short track defects. Wear 271(1-2), 349–356 (2011)
Zhao, X., Li, Z., Liu, J.: Wheel-rail impact and the dynamic forces at discrete supports of rails in the presence of singular rail surface defects. Proc. Instn Mech. Engrs, Part F: Journal of Rail and Rapid Transit. 226, 124–139 (2011)
Wu, T.W.: Boundary Element Acoustics: Fundamentals and computer codes. Advances in boundary elements. WIT Press, Southampton (2000)
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2015 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Yang, Z., Li, Z., Dollevoet, R.P.B.J. (2015). An Explicit Integration Finite Element Method for Impact Noise Generation at a Squat. In: Nielsen, J., et al. Noise and Vibration Mitigation for Rail Transportation Systems. Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol 126. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-44832-8_9
Download citation
DOI: https://doi.org/10.1007/978-3-662-44832-8_9
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-662-44831-1
Online ISBN: 978-3-662-44832-8
eBook Packages: EngineeringEngineering (R0)