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A Multi-Body Dynamic Model for Analysis of Localized Track Responses in Vicinity of Rail Discontinuities

Department of Engineering and Architectural Studies, Christchurch Polytechnic Institute of Technology (CPIT), P. O. Box 540, Christchurch 8140, New Zealand

School of Engineering and Technology, CQUniversity, North Rockhampton, QLD 4702, Australia

E-mail Address: hossein.askarinejad@cpit.ac.nz

Corresponding author.

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M. Dhanasekar

School of Civil Engineering and Built Environment, S-714, GP Campus, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia

E-mail Address: m.dhanasekar@qut.edu.au

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https://doi.org/10.1142/S0219455415500583Cited by:17 (Source: Crossref)

Abstract

Rail discontinuities are one of the main sources of wheel impact causing high levels of noise, vibration and stresses in railway track. Even though various multi-body train–track interaction models have been developed in the past decade, accurate modeling and analysis of the track dynamic behavior in the vicinity of rail discontinuities is rare in the literature. In this paper, formulation of a new explicit multi-body dynamic (MBD) model incorporating detailed wagon, wheel–rail subsystems and track containing a rail discontinuity (rail joint) is reported. The predictions of the localized track responses are validated using the data from two gapped rail joints in the field test. The validated model accurately determines the impact forces and dynamic responses. The simulation results provide valuable insight on the behavior of track in vicinity of a rail discontinuity, the sensitivity of the design parameters to the impact forces and the track dynamic responses currently unavailable in the literature.

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