Assessing the accuracy of different simplified frictional rolling contact algorithms

E. A H Vollebregt, S. D. Iwnicki, Gongnan Xie, P. Shackleton

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

This paper presents an approach for assessing the accuracy of different frictional rolling contact theories. The main characteristic of the approach is that it takes a statistically oriented view. This yields a better insight into the behaviour of the methods in diverse circumstances (varying contact patch ellipticities, mixed longitudinal, lateral and spin creepages) than is obtained when only a small number of (basic) circumstances are used in the comparison. The range of contact parameters that occur for realistic vehicles and tracks are assessed using simulations with theVampire vehicle system dynamics (VSD) package. This shows that larger values for the spin creepage occur rather frequently. Based on this, our approach is applied to typical cases for which railway VSD packages are used. The results show that particularly the USETAB approach but also FASTSIM give considerably better results than the linear theory, Vermeulen-Johnson, Shen-Hedrick-Elkins and Polach methods, when compared with the 'complete theory' of the CONTACT program.

Original languageEnglish
Pages (from-to)1-17
Number of pages17
JournalVehicle System Dynamics
Volume50
Issue number1
Early online date15 Aug 2011
DOIs
Publication statusPublished - 2012
Externally publishedYes

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