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Lateral dynamic features of a railway vehicle ----2016-04-01

Title: Lateral dynamic features of a railway vehicle

Author: Gao, XJ (Gao, Xue-jun)8; True, H (True, Hans); Li, YH (Li, Ying-hui)

Journal: Proceedings of The Institution Of Mechanical Engineers Part F-Journal of Rail and Rapid Transit

Volume: 230  issue: 3  page: 909-923

DOI: 10.1177/0954409715572856

Year: MAR 2016

Abstract

The lateral dynamic features of a railway vehicle are investigated using two similar wheel/rail contact models: the Vermeulen-Johnson and the Shen-Hedrick-Elkins models. The symmetric/asymmetric bifurcation behaviour and chaotic motions of the railway vehicle are investigated in great detail by varying the speed and using the resultant bifurcation diagram' method. It is found that multiple solution branches exist and they can lead to more steady states in the dynamic behaviour of the railway vehicle. The coexistence of multiple steady states can lead to jumps in the amplitude of oscillations, resulting in problems for safe operation of the vehicle. Therefore, it should be avoided in everyday operation. Furthermore, the creation of multiple solution branches suggests that the critical speed of a vehicle should be determined from a comprehensive analysis of the various kinds of possible excitations and numerous tests.

 

Key Words: Solution branch; railway vehicle; symmetry; asymmetry; bifurcation; coexistence

 

Accession Number: WOS:000371084800022

 

http://pif.sagepub.com/content/early/2015/02/26/0954409715572856.abstract