The wheel-rail contact friction influence on high speed vehicle model stability

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Transport Problems

Silesian University of Technology

Subject: Economics , Transportation , Transportation Science & Technology

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eISSN: 2300-861X

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VOLUME 10 , ISSUE 3 (September 2015) > List of articles

The wheel-rail contact friction influence on high speed vehicle model stability

Mirosław DUSZA

Keywords : coefficient of friction, stability of motion, numerical simulation

Citation Information : Transport Problems. Volume 10, Issue 3, Pages 73-86, DOI: https://doi.org/10.21307/tp-2015-036

License : (CC BY-SA 4.0)

Published Online: 21-April-2017

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ABSTRACT

Right estimating of the coefficient of friction between the wheel and rail is essential in modelling rail vehicle dynamics. Constant value of coefficient of friction is the typical assumption in theoretical studies. But it is obvious that in real circumstances a few factors may have significant influence on the rails surface condition and this way on the coefficient of friction value. For example the weather condition, the railway location etc. Influence of the coefficient of friction changes on high speed rail vehicle model dynamics is presented in this paper. Four axle rail vehicle model were built. The FASTSIM code is employed for calculation of the tangential contact forces between wheel and rail. One coefficient of friction value is adopted in the particular simulation process. To check the vehicle model properties under the influence of wheel-rail coefficient of friction changes, twenty four series of simulations were performed. For three curved tracks of radii R = 3000m, 6000m and  (straight track), the coefficient of friction was changed from 0.1 to 0.8. The results are presented in form of bifurcation diagrams.

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