A nonlinear wagon-track model on curved track has been developed to characterize rail corrugation formation due to self-excitation of the wheel-rail stick-slip process. In this model, wagon movements were described using up to 78 degrees of freedom (DOFs) to model a three-piece freight bogie. Innovatively, the wheelset movements are described using nine DOFs, including torsional and bending modes about the longitudinal and vertical directions. The track modelling is considered as a one-layer structure (two rail beams on discrete spring and damper elements). The wheel sliding after creepage saturation is considered in the wheel-rail interface modelling. Simulation of a case study shows that the frequencies of the wheel stick-slip process are composed of the basic frequency, which might come from the combined effect of sleeper-passing frequency and one-third of the combined torsional and bending frequency of the wheelset, and the double and triple basic frequencies, which form the wavelengths of rail corrugation at different situations.
Nonlinear three-dimensional wagon-track model for the investigation of rail corrugation initiation on curved track
Vehicle System Dynamics ; 45 , 2 ; 113-132
2007
20 Seiten, 32 Quellen
Article (Journal)
English
Taylor & Francis Verlag | 2007
|RTD2005-70035 Vehicle-Track Modelling for Rail Corrugation Initiation Investigation
British Library Conference Proceedings | 2005
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