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

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

Burgelman, N.D.M. (TU Delft Railway Engineering)
Li, Z. (TU Delft Railway Engineering)
Dollevoet, R.P.B.J. (TU Delft Railway Engineering)

2016

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.

Braking
Derailment quotient
Longitudinal train dynamics
Turnout
Vehicle simulation

http://resolver.tudelft.nl/uuid:260fe4e8-ce88-4c71-973c-ee4405b7e8cd

https://doi.org/10.1504/IJHVS.2016.077320

2017-03-01

1744-232X

International Journal of Heavy Vehicle Systems, 23 (3), 213-229

Institutional Repository

journal article

© 2016 N.D.M. Burgelman, Z. Li, R.P.B.J. Dollevoet