Dynamic model for the wheel–rail contact friction
| Autor: | HyunWook Lee, Corina Sandu, Carvel Holton |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Engineering
Contact friction business.industry Mechanical Engineering Mathematics::General Topology Poison control Surface finish Mechanics Physics::Classical Physics Automotive engineering Vibration Vehicle dynamics Mathematics::Logic Nonlinear system Automotive Engineering Safety Risk Reliability and Quality Constant (mathematics) business Coefficient of friction |
| Zdroj: | Vehicle System Dynamics. 50:299-321 |
| ISSN: | 1744-5159 0042-3114 |
| DOI: | 10.1080/00423114.2011.582121 |
| Popis: | Accurately estimating the coefficient of friction (CoF) is essential in modelling railroad dynamics, reducing maintenance costs, and increasing safety in rail operations. The typical assumption of a constant CoF is widely used in theoretical studies; however, it has been noticed that the CoF is not constant, but rather depends on various dynamic parameters and instantaneous conditions. In this paper, we present a newly developed three-dimensional nonlinear CoF model for the dry rail condition and test the CoF variation using this model with estimated dynamic parameters. The wheel–rail is modelled as a mass–spring–damper system to simulate the basic wheel–rail dynamics. Although relatively simple, this model is considered sufficient for the purpose of this study. Simulations are performed at a train speed of 20 m/s using rail roughness as an excitation source. The model captures the CoF extremes and illustrates its nonlinear behaviour and instantaneous dependence on several structural and dynamic parameters. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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