1 IMPROVEMENT OF TRAIN-TRACK INTERACTION IN TURNOUTS BY OPTIMISING THE SHAPE OF CROSSING NOSE C.Wan

Proper rail geometry in the crossing part is essential for reducing damages on the nose rail.A numerical optimisation approach to minimise impact damage and wear in the crossing panel by varying the nose rail shapeis presented in the paper.Theoptimisation formulatedas a weighted multi-objective problemis solved by adapting the Multipoint Approximation Method (MAM).Dynamic vehicle-turnout interaction as a function of crossing geometry is investigated using multi-body simulation method. The optimisation problem has been solved for different sets of weightcoefficients. Afterwards the robustness of the optimumdesigns has been analysed under different vehicle-track system conditions. 1