Gearless Track-Friendly Metro with Guided Independently Rotating Wheels

Abstract

Track–vehicle severe interaction on track with small curve radius results in rail wear and corrugation, and wheel polygonization, which drain considerable resources for rail grinding and wheels re-profiling in metro lines. To reduce the damage caused by track-vehicle severe interaction, the paper analyzes the reasons leading to rail wear and then proposes an architecture of a metro vehicle with independently rotating wheels driven directly by permanent magnet synchronous motors. The architecture is axle guidance, offered by passive linkages, which ensures that all axles are oriented radially, while control strategy was kept as simple as possible, identifying only two basic traction conditions. The concept is first discussed and then validated through a comprehensive set of running dynamics simulation performed with a multibody software to evaluate rail wear and rolling contact fatigue in traction/braking, coasting with different cant deficiency/excess conditions. The multibody dynamics simulation shows that the proposed architecture is virtually capable of avoiding both wear and rolling contact fatigue damages, and achieves the highest possible track friendliness. The concept of the proposed architecture is a track-fiendly metro architecture and could be a good reference for reducing rail-track interaction damages and maintainace cost.

Keywords

Metro vehicle / Independently rotating wheels / Passive steering / Direct drive, permanent magnet synchronous motor, track friendliness

References

[1] Bracciali A (2006) Rail corrugation growth in a metro curve, In: Proc 7th international conference on contact mechanics and wear of rail/wheel systems, Brisbane, Australia, September 24–27

[2] Stock R, Stanlake L, Hardwick C, Yu M, Eadie D, Lewis R. Material concepts for top of rail friction management – classification characterisation and application. Wear, 2016, 366: 7225-7232

[3] Wickens A (2003) Fundamentals of rail vehicle dynamics: guidance and stability, Swets & Zeitlinger B.V., Lisse, The Netherlands, ISBN 90-265-1946-X

[4] Eickhoff B Schmidt F Wheel-rail interface interactions. Wheel-rail best practice handbook, 2010 University of Birmingham Press

[5] Bracciali A, Piccioli F (2014) Elimination of failures in railway gearboxes by regenerative coasting, In: J. Pombo (Eds), Proceedings of the second international conference on railway technology: research, development and maintenance", Ajaccio, Corsica, 8-11.4.2014, Civil-Comp Press, Stirlingshire, UK, Paper 312, 2014. https://doi.org/10.4203/ccp.104.312

[6] Bracciali A, Piccioli F (2014) Effect of load on vibrations of a railway gearbox, In: Pombo J (Eds.) Proceedings of the second international conference on railway technology: research, development and maintenance, Ajaccio, Corsica, 8-11.4.2014, Civil-Comp Press, Stirlingshire, UK, Paper 306, 2014. https://doi.org/10.4203/ccp.104.306.

[7] Grassie SL, Elkins JA. Tractive effort, curving and surface damage of rails – Part 1. Forces exerted on the rails. Wear, 2005, 258: 1235-1244

[8] Grassie SL, Elkins JA. Traction and curving behaviour of a railway bogie. Veh Syst Dyn, 2006, 44: 883-891

[9] Elia A. Fiat Pendolino: developments, experiences and perspectives. Proc Instn Mech Engrs Part F, 1998, 212(1): 7-17

[10] José Luis López Gómez, Trenes Talgo pendulares y de alta o muy alta velocidad, https://www.aecientificos.es/trenes-talgo-pendulares-y-de-alta-o-muy-alta-velocidad/, Accessed on 25.03.2021.

[11] Bracciali A. Railway wheelsets: history, research and developments. Int J Railw Technol, 2016, 5(1): 23-52

[12] Hondius H. The development of low-floor trams. J Adv Transp, 1992, 27: 79-102

[13] Ultra Low Floor, https://de.wikipedia.org/wiki/Ultra_Low_Floor, Accessed on 25.03.2021

[14] Krettek O (1998) Running behaviour of the single wheel and its influence illustrated by example of the ULF Ultra Low Floor tramcar of the Vienna transport authorities, In: 5th mini conference on the vehicle system dynamics, identification and anomalies, Budapest, pp 183-201

[15] Stadler Variobahn, https://en.wikipedia.org/wiki/Stadler_Variobahn, Accessed on 25.03.2021

[16] Škoda 15 T, https://en.wikipedia.org/wiki/%C5%A0koda_15_T, Accessed on 25.03.2021

[17] Kolar J. Design of a wheelset drive. Trans Electr Eng, 2015, 4: 11-19.

[18] Peroutka Z, Zeman K, Krus F, Kosta F (2009) New generation of full low-floor trams: control of wheel drives with permanent magnet synchronous motors, In: 2009 IEEE energy conversion congress and exposition, San Jose, CA, USA, 2009, pp 1833-1840, https://doi.org/10.1109/ECCE.2009.5316438

[19] EN 14363:2016+A1 (2016) Railway applications – testing and simulation for the acceptance of running characteristics of railway vehicles – running behaviour and stationary tests, CEN, Brussels

[20] Elkins JA, Eickhoff BM. Advances in nonlinear wheel/rail force prediction methods and their validation. J Dyn Sys Meas Control, 1982, 104(2): 133-142

[21] Burstow MC (2003) A model to predict and understand rolling contact fatigue in wheels and rails, AEA Technology Rail, Derby

[22] Öberg J, Andersson E (2009) Determining deterioration cost for railway tracks, Proc I Mech E F J Rail Rapid Transit, 223: 121-129 https://doi.org/10.1243/09544097JRRT222

[23] Commission Regulation (EU) No 1299/2014 of 18 November 2014 on the technical specifications for interoperability relating to the ‘infrastructure’ subsystem of the rail system in the European Union. https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:02014R1299-20190616 Accessed on 28.03.2021

[24] Vi-Grade Engineering Software & Service (2017) Vi-Rail 18.0 Documentation, Vi-Grade GmbH, Marburg, Germany

[25] Kalker JJ. A fast algorithm for the simplified theory of rolling-contact. Veh Syst Dyn, 1982, 11(1): 1-13