Experimental evidence, as obtained from line tests, shows that, under some circumstances, the level of hunting motion experienced by a railway vehicle negotiating a curve can be higher than for the same vehicle running at the same speed on tangent track. Starting from this experimental observation, this paper aims to propose a physical explanation for the different hunting behaviour of a railway vehicle running in a curve. After presenting the available experimental evidence, a qualitative examination of the phenomenon is provided. A multi-body model of the vehicle running in a curve is defined and validated against line measurements. This model is then used to numerically evaluate the hunting behaviour of the vehicle in a wide range of curve radii relevant for high-speed lines. In this way, the experimental findings are extended to curve radius and cant deficiency values that were not observed in line tests, due to the use of a specific track section and to the range of speeds covered by the tests.
|Titolo:||Evaluation of the hunting behaviour of a railway vehicle in a curve|
|Data di pubblicazione:||2015|
|Appare nelle tipologie:||01.1 Articolo in Rivista|
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|Proceedings of the Institution of Mechanical Engineers, Part F_ Journal of Rail and Rapid Transit-2015-Mazzola-530-41.pdf||Publisher’s version||Accesso riservato|
|Evaluation of the hunting behaviour of a railway vehicle in a curve_11311-800319_Mazzola.pdf||Post-Print (DRAFT o Author’s Accepted Manuscript-AAM)||Accesso apertoVisualizza/Apri|