The influence of rail lubrication on wear and energy dissipation in wheel/rail contact
Abstract: This work investigates the energy dissipation in a wheel/rail system with field measurements and friction work modelling. Friction and contact conditions are measured and analyzed in order to calculate the power saving of one vehicle running over a curve of a metro line. For modelling the...
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| Tipo de recurso: | tesis de maestría |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2015 |
| País: | Colombia |
| Institución: | Universidad Nacional de Colombia |
| Repositorio: | Repositorio UN |
| Idioma: | español |
| OAI Identifier: | oai:repositorio.unal.edu.co:unal/53502 |
| Acceso en línea: | https://repositorio.unal.edu.co/handle/unal/53502 http://bdigital.unal.edu.co/48087/ |
| Access Level: | acceso abierto |
| Palabra clave: | 62 Ingeniería y operaciones afines / Engineering Multi-body simulation Frictional work Energy consumption Lubricants Wheel/rail wear Simulación multicuerpo Trabajo por fricción Consumo de energía Lubricantes Desgaste rueda/riel Disipación energética Contacto de rodadura Fricción (Mecánica) Desgaste mecánico Rolling contact Energy dissipation Lubrication and lubricants Mechanical wear |
| Sumario: | Abstract: This work investigates the energy dissipation in a wheel/rail system with field measurements and friction work modelling. Friction and contact conditions are measured and analyzed in order to calculate the power saving of one vehicle running over a curve of a metro line. For modelling the contact forces, creepages and spin between the wheels and rails are determined via simulations of a train travelling in a curve of the track. Next the contact stress and the micro-slip in the contact area are computed from the forces, creepages and spin as well as the measured friction coefficient and profiles of wheels and rail. Three friction conditions are tested: dry, lubricated with a friction modifier and a post lubricated condition. The total frictional work is obtained by integrating local frictional dissipation over the contact area. The wear is also analyzed according to the Tγ method including the spin, in combination with Kalker’s simplified theory, assuming that the wear is proportional to the frictional work. The frictional work is then related to the energy consumptions under the different friction conditions, which allows evaluating the effectiveness of the friction modifier and its influence on the wear of the wheel/rail system. |
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