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Railway track longitudinal force model

Most railway track dynamics models focus on vertical and lateral directions. Vehicle dynamics have strong implications for track longitudinal dynamics, but railway track longitudinal force models are rarely published. This paper developed a three-dimensional railway track model which considers four structure layers: rails, sleepers, ballast and subballast. The rails are modelled using the Finite Element Method and each node has six Degrees of Freedom (DoFs). Sleepers are modelled as rigid bodies and each also has six DoFs. Ballast and subballast are modelled as blocks and each has three translational DoFs. Frictional behaviour is considered in the longitudinal direction of the fastening models as well as in the longitudinal and lateral directions of the sleeper-ballast force connections. Validations of the model are presented in this paper. Simulations of longitudinal forces are also presented. The results show that the model has the capability of simulating track longitudinal forces and the rail creep phenomenon. © 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group.

History

Start Page

1

End Page

16

Number of Pages

16

eISSN

1744-5159

ISSN

0042-3114

Publisher

Taylor & Francis, UK

Peer Reviewed

Yes

Open Access

No

Acceptance Date

15/09/2019

Author Research Institute

Centre for Railway Engineering

Era Eligible

Yes

Journal

Vehicle System Dynamics