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Non-steady state contact with falling friction coefficient

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While obtaining a solution to the wheel-rail contact problem, a series of hypotheses are made in order to obtain a quick solution. However, some of these hypotheses are not admissible when solving certain problems. Among these simplifications can be included the assumption of a constant friction coefficient and of a stationary state contact. In order to overcome these limitations, a new algorithm that takes into account the transient effects and a falling friction coefficient is proposed in this work. This algorithm is based on FastSim, which has the best computational cost/precision ratio.

Keywords: falling friction coefficient; non-steady state; wheel rail contact

Document Type: Research Article


Affiliations: 1: CEIT, San Sebastian, Guipuzcoa, Spain 2: Construcciones y Auxiliar de Ferrocarriles, S.A. and TECNUN, University of Navarra, Beasain, Guipuzcoa, Spain

Publication date: September 1, 2008

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