Fast estimation of the derailment risk of a braking train in curves and turnouts

Journal Article (2016)
Author(s)

Nico Burgelman (TU Delft - Railway Engineering)

Z. Li (TU Delft - Railway Engineering)

RPBJ Dollevoet (TU Delft - Railway Engineering)

Research Group
Railway Engineering
Copyright
© 2016 N.D.M. Burgelman, Z. Li, R.P.B.J. Dollevoet
DOI related publication
https://doi.org/10.1504/IJHVS.2016.077320
More Info
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Publication Year
2016
Language
English
Copyright
© 2016 N.D.M. Burgelman, Z. Li, R.P.B.J. Dollevoet
Research Group
Railway Engineering
Issue number
3
Volume number
23
Pages (from-to)
213-229
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Abstract

When a train runs through a turnout or a sharp curve, high lateral forces occur between the wheels and rails. These lateral forces increase when the couplers between the wagons are loaded in compression, i.e., a rear locomotive pushing a train or a front locomotive braking a train. This study quantifies these effects for a train that begins braking when steadily curving and for a train that brakes upon entering a turnout. Our approach allows distinguishing between the effects of braking and the transient effects of entering the turnout. The dynamic derailment quotient is mapped as a function of the vehicle speed and the braking effort. Then the dynamic derailment coefficient obtained from the dynamic simulations is compared to results from quasi statics. This allows determining a dynamic multiplication coefficient that can be used on the quasi static derailment coefficient to obtain a first estimate of the dynamic derailment coefficient.

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