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Impact forces at dipped rail joints

journal contribution
posted on 06.12.2017, 00:00 by Nirmal Mandal, Manicka Dhanasekar, Yan Sun
Impact forces develop at the wheel/rail interface due to the presence ofdefects in the running surface of the wheel and/or the railhead. This paperreports on wheel impacts caused due to permanently dipped rail jointscharacterised by high frequency impact forces of high amplifications ofstatic load that occur for a very short duration (P1 forces), followed byrelatively low frequency, lower amplitude forces (P2 forces) that occur for alonger duration. These impact forces are affected by the design ofcomponents adjacent to the wheel and the rail, namely the bogie primarysuspension and rail seat pads; the influences of stiffness and dampingcharacteristics of these components are investigated. A modified 3Dwagon-track system dynamics simulation model that accounts for defectsin track is used to obtain the impact force time series which is converted toimpact force factors and compared with a set of field measured datareported in the literature. A simplified equation for the determination ofimpact force factors due to dipped rail joints is also proposed andvalidated.

Funding

Category 4 - CRC Research Income

History

Issue

2014

Start Page

271

End Page

282

Number of Pages

12

eISSN

2041-3017

ISSN

0954-4097

Location

United Kingdom

Publisher

Sage

Language

en-aus

Peer Reviewed

Yes

Open Access

No

External Author Affiliations

Centre for Railway Engineering (2015- ); Institute for Resource Industries and Sustainability (IRIS); Queensland University of Technology; School of Engineering and Technology (2013- );

Era Eligible

Yes

Journal

Proceedings of the Institution of Mechanical Engineers Part F : journal of rail and rapid transit.

Exports