Prediction of the growth of wear-type rail corrugation

The growth behaviour of the vibrational wear phenomenon known as rail corrugation is investigated analytically and numerically using mathematical models. A simplified feedback model for wear-type rail corrugation that includes a wheel pass time delay is developed with an aim to analytically distil t...

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Bibliographic Details
Published in:Wear 2005-03, Vol.258 (7), p.1001-1013
Main Authors: Meehan, P.A., Daniel, W.J.T., Campey, T.
Format: Article
Language:English
Subjects:
Applied sciences
Corrugation
Delay equations
Dynamical instability
Exact sciences and technology
Friction, wear, lubrication
Fundamental areas of phenomenology (including applications)
Machine components
Mechanical contact (friction...)
Mechanical engineering. Machine design
Physics
Rail wear dynamics
Railway finite element modelling
Rolling contact mechanics
Solid mechanics
Structural and continuum mechanics
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Summary:The growth behaviour of the vibrational wear phenomenon known as rail corrugation is investigated analytically and numerically using mathematical models. A simplified feedback model for wear-type rail corrugation that includes a wheel pass time delay is developed with an aim to analytically distil the most critical interaction occurring between the wheel/rail structural dynamics, rolling contact mechanics and rail wear. To this end, a stability analysis on the complete system is performed to determine the growth of wear-type rail corrugations over multiple wheelset passages. This analysis indicates that although the dynamical behaviour of the system is stable for each wheel passage, over multiple wheelset passages, the growth of wear-type corrugations is shown to be the result of instability due to feedback interaction between the three primary components of the model. The corrugations are shown analytically to grow for all realistic railway parameters. From this analysis an analytical expression for the exponential growth rate of corrugations in terms of known parameters is developed. This convenient expression is used to perform a sensitivity analysis to identify critical parameters that most affect corrugation growth. The analytical predictions are shown to compare well with results from a benchmarked time-domain finite element model.
ISSN:0043-1648
1873-2577
DOI:10.1016/j.wear.2004.03.049