Locomotive Adhesion Control + Rail Friction Field Measurements = ?
- 128 Downloads
The design and validation of a locomotive adhesion control system is a very complex multi-disciplinary engineering problem that not only requires consideration of the electrical system but also requires to go very deeply into mechanical and material engineering as well as tribology. The typical approach for advanced locomotive traction studies focuses on the development of the following models and algorithms: train dynamics modelling, multibody locomotive model, traction power system model, adhesion control algorithms, wheel-rail contact modelling and track models. These are required to cover all the physical processes present in the system. One of the complicated parts of this system is how to represent the creep force characteristics at the wheel-rail interface properly without measurements being performed on existing or modified/upgraded locomotives under traction or braking because any locomotive field measurements involve high testing costs. This paper discusses how this can be avoided using friction measurement data obtained in the field with an experimental tribometer and how that data should be interpreted for locomotive studies, and how it might affect locomotive performance outcomes considering locomotive adhesion control strategies. Numerical experiments have been performed by the co-simulation of two full traction control systems developed in Simulink, and two locomotive mechanical models developed in Gensys multibody software, representing two standard gauge heavy haul locomotives running under traction operational scenarios. All possible limitations and results observed during the development and implementation studies have been discussed.
KeywordsLocomotive Wheel Rail Adhesion Traction Tribometer Friction Creep Modelling
- 1.Spiryagin, M., Wolfs, P., Cole, C., Spiryagin, V., Sun, Y.Q., McSweeney, T.: Design and Simulation of Heavy Haul Locomotives. Ground Vehicle Engineering Series. CRC Press, Boca Raton (2017)Google Scholar
- 2.Steimel, A.: Electric Traction–Motive Power and Energy Supply: Basics and Practical Experience. Oldenbourg Industrieverlag GmbH, Munich (2008)Google Scholar
- 3.Logston, C.F., Itami, G.S.: Locomotive friction-creep studies. In: Paper No. 80-RT-1, Joint Railroad Conference, American Society of Mechanical Engineers, Montreal (1982)Google Scholar
- 6.Harrison, H.D.: Development of a third generation tribometer. In: CM2015 - 10th International Conference on Contact Mechanics, Colorado Springs, CO, USA (2015)Google Scholar
- 7.Spiryagin, M., Nielsen, D., Wu, Q., Bosomworth, C., Sun, Y., Cole, C.: Advanced friction measurements and their application for locomotive traction-track damage studies. In: Proceedings of the Conference on Railway Excellence (CORE2018) - Rail: Smart, Automated, Sustainable, pp. 1–9. RTSA: Engineers Australia, Sydney (2018)Google Scholar
- 8.Spiryagin, M., Persson, I., Hayman, M., Wu, Q., Sun, Y., Nielsen, D., Bosomworth, C., Cole, C.: Friction measurement and creep force modelling methodology for locomotive track damage studies. In: Proceedings of the 11th International Conference on Contact Mechanics and Wear of Rail/wheel Systems, CM 2018, pp. 914–920. TU Delft, Delft (2018)Google Scholar
- 11.George, A.L.: Theoretical and numerical investigation on traction forces for high adhesion locomotives, M.Eng. thesis, Central Queensland University (2015)Google Scholar
- 12.Ramsey, N., Szanto, F., Hewison, P.: Introducing the next generation locomotive to the Australian rail network. In: Conference on Railway Engineering CORE2008, RTSA: Engineers Australia, Perth, Australia (2018)Google Scholar
- 14.Spiryagin, M., Persson, I., Wu, Q., Bosomworth, C., Wolfs, P., Cole, C.: A co-simulation approach for heavy haul long distance locomotive-track simulation studies. Veh. Syst. Dyn. (2018). https://doi.org/10.1080/00423114.2018.1504088