Author : Koci DORACI 1
Date of Publication :8th March 2017
Abstract: this paper objective is to contribute in the optimization of the problem of guiding forces during the movement of the railway vehicle. The work proposes an innovative solution as compared to classical author suggestions which are limited to a small number of alternatives. Methodology follows an experimental approach. An experiment with two stages takes place where experimental conditions are modeled after profiles designed following a curved path with 500 m radius (classified as tight curve by definition). In the first experimental stage standard profiles were used, while for the second experimental stage curvilinear profiles were exploited. After experiment conduction data concerning (1) displacement (2) moments of force and (3) guiding forces of wheel-rail contact were analyzed and compared for both stages: standard profiles and curvilinear profiles After experimental results, major conclusions of the paper are: (1) in the case of curvilinear profiles profile, small movements of vehicle, lead to a change in the size of the wheel displacement smaller than the corresponding change in standard profiles; (2) moments of force are greater in the case of standard profiles compared to curvilinear ones; and (3) curvilinear profiles enable a movement without many contact point with the wheel, friction forces exert their action in longitudinal direction, thus by causing a smaller value of guiding forces.
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