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Track gauge optimisation of railway switches using a genetic algorithm

Björn Pålsson (Institutionen för tillämpad mekanik, Dynamik) ; Jens C. O. Nielsen (Institutionen för tillämpad mekanik, Dynamik)
Vehicle System Dynamics (0042-3114). Vol. 50 (2012), p. 365-387.
[Artikel, refereegranskad vetenskaplig]

A methodology for the optimisation of a prescribed track gauge variation (gauge widening) in the switch panel of a railway turnout (switch and crossing, S&C) is presented. The aim is to reduce rail profile degradation. A holistic approach is applied, where both routes and travel directions (moves) of traffic in the switch panel are considered simultaneously. The problem is formulated as a multi-objective minimisation problem which is solved using a genetic-type optimisation algorithm which provides a set of Pareto optimal solutions. The dynamic vehicle-turnout interaction is evaluated using a multibody simulation tool and the energy dissipation in the wheel-rail contacts is used for the assessment of gauge parameters. Two different vehicle models are used, one freight car and one passenger train set, and a stochastic spread in wheel profile and wheel-rail friction coefficient is accounted for. It is found that gauge configurations with a large gauge-widening amplitude for the stock rail on the field side are optimal for both the through and diverging routes, while the results for the gauge side show a larger route dependence. The optimal gauge configurations are observed to be similar for both vehicle types.

Nyckelord: turnout, switch, gauge, optimisation, dynamic interaction, turnout, train, simulation

Denna post skapades 2012-08-23. Senast ändrad 2016-03-22.
CPL Pubid: 162508


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Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Dynamik



Chalmers infrastruktur

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Optimisation of Railway Switches and Crossings