Study on Wheel/rail Creep Curve Based on POLACH's Method

doi:10.3901/JME.2018.04.124

Abstract

Abstract: The creep curve is very important for describing wheel-rail interaction and maintaining good vehicle traction/brake control performance. A detailed investigation is performed on the change of adhesion coefficient as a result of parametric variables such as attenuation factors, slip dependent friction coefficient, wheel/rail contact geometry, wheel load and vehicle running speed based on Polach's method. The study finds that attenuation factor can represent roughness of wheel/rail interface and describe decay of initial slope of creep curve. Slip dependent friction can represent the decrease of creep curve in large creep zone. The creep curve at rail gauge corner is obviously different from that at rail top, easily explaining the phenomenon of rail side wear at small radius curves. Under wet condition, adhesion coefficient decrease with the increacement of speed. But the calculating adhesion is higher than that measured in field test according to literature. A slip and velocity dependent friction is introduced to obtain reasonable results.

Key words: adhesion coefficient, creep curve, slip dependent friction, wheel/rail relationship

CLC Number:

U211

AN Boyang, WANG Ping, XU Yixin, XU Jingmang, CHEN Rong. Study on Wheel/rail Creep Curve Based on POLACH's Method[J]. Journal of Mechanical Engineering, 2018, 54(4): 124-131.

References

[1] OHYAMA T. Tribological studies on adhesion phenomena between wheel and rail at high speed[J]. Wear, 1991, 144:263-275.
[2] ZHANG W, CHEN J, WU X, et al. Wheel/rail adhesion and analysis by using full scale roller rig[J]. Wear, 2002, 253(1):82-88.
[3] VOLLEBREGT E A H. Numerical modeling of measured railway creep versus creep-force curves with CONTACT[J]. Wear, 2014, 314(1):87-95.
[4] POLACH O. Creep force in simulation of traction vehicles running on adhesion limit[J]. Wear, 2005, 258:992-1000.
[5] CARTER F W. On the action of a locomotive driving wheel[J]. Pro. R. Soc., London, A. 1926,112:151-157.
[6] VERMEULEN P J, JOHNSON K L. Contact of non-spherical bodies transmitting tangential forces[J]. J. Appl. Mech., 1964, 31:338-340.
[7] KALKER J. Three-dimensional elastic bodies in rolling contact[M]. Netherlands:Solid Mechanics and its Applications, Kluwer Academic Publishers, 1990.
[8] ERTZ M, BUCHER F. Improved creep force model for wheel/rail contact considering roughness and temperature[J]. Vehicle System Dynamics, 2002, 37(sup1):314-325.
[9] SPIRYAGIN M, POLACH O and COLE C. Creep force modelling for rail traction vehicles based on the Fastsim algorithm[J]. Vehicle System Dynamics, 2013, 51(11):1765-1783.
[10] TRAN M, ANG K and LUONG V, et al. Hgih-speed trains subject to abrupt braking[J]. Vehicle System Dynamics, 2016, 54(12):1715-1735.
[11] ZHU Y, OLOFSSON U and NILSSON R. A field test study of leaf contamination on railhead surfaces[J]. Proceedings of the Institution of Mechanical Engineers, Part F:Journal of Rail and Rapid Transit, 2014, 228(1):71-84.
[12] WU B, WEN Z, WANG H, et al. Analysis of wheel/rail adhesion under oil contamination with surface roughness[J]. Proceedings of the Institution of Mechanical Engineers, Part J:Journal of Engineering Tribology, 2013, 227(11):1306-1315.
[13] CHEN H, ISHIDA M, NAMURA A, et al. Estimation of wheel/rail adhesion coefficient under wet condition with measured boundary friction coefficient and real contact area[J]. Wear, 2011, 271:32-39.
[14] ZHAO X, WEN Z, ZHU M, et al. A study on high-speed rolling contact between a wheel and a contaminated rail[J]. Vehicle System Dynamics, 2014, 52(10):1270-1287.
[15] EADIE D T, ELVIDGE D, OLDKNOW K, et al. The effects of top of rail friction modifier on wear and rolling contact fatigue:Full-scale rail-wheel test rig evaluation, analysis and modelling[J]. Wear, 2008, 265(9):1222-1230.
[16] ARIAS-CUEVAS O, LI Z, LEWIS R. A laboratory investigation on the influence of the particle size and slip during sanding on the adhesion and wear in the wheel-rail contact[J]. Wear, 2011, 271(1):14-24.
[17] ROVIRA A, RODA A, LEWIS R, et al.. Application of Fastsim with variable coefficient of friction using twin disc experimental measurements[J]. Wear, 2012, 274:109-126.
[18] KALKER J. A fast algorithm for the simplified theory of rolling contact[J]. Vehicle system dynamics, 1982, 11(1):1-13.
[19] 金学松, 刘启跃. 轮轨摩擦学[M]. 北京:中国铁道出版社,2004. JIN Xuesong, LIU Qiyue. Tribology of wheel and rail[M]. Beijing:China Railway Press, 2004
[20] 赵鑫, 温泽峰, 王衡禹, 等. 三维高速轮轨瞬态滚动接触有限元模型及其应用[J]. 机械工程学报, 2013, 49(18):1-7. ZHAO X, WEN Z, WANG H, et al.. 3D transient finite element model for high-speed wheel-rail rolling contact and its application[J]. Journal of Mechanical Engineering, 2013, 49(18):1-7.