Analysis of wave behavior in rails using a numerical model

Feng, Dai, Ying, Zhu and David, Thompson (2018) Analysis of wave behavior in rails using a numerical model. In 25th International Congress on Sound and Vibration 2018, ICSV 2018: Hiroshima Calling. vol. 7, International Institute of Acoustics and Vibration. pp. 3879-3886 .

Record type: Conference or Workshop Item (Paper)

Abstract

The vibration of the rail is a major contributor to railway rolling noise and consists of different waves that propagate along the rail. In order to study the dynamic behaviour of a railway track, models based on Timoshenko beam theory and waveguide finite element method were established. The solution procedures to obtain the free wave response and the forced response for each model were described. The characteristics of waves in rail in terms of wavenumber, group velocity, mobility and decay rate were analyzed based on two different models. The results indicate that using the waveguide finite element model, which includes all the features of rail cross-section deformation, eight kinds of waves are identified in rail within the frequency range up to 6 kHz. Moreover, the phenomena of wave mode exchange and group velocity exchange between waves are presented as well as the peak in the mobility due to the excitation of the higher order wave mode.

This record has no associated files available for download.