Analysis and method of the analysis of non-linear lateral stability of railway vehicles in curved track

The paper is a contribution into the question of stability in curves and into breaking down the traditional approach to it. It shows that considering stability in curves is reasonable, justifiable and worthwhile. Formal shape of the original method of stability analysis in curved track is presented. Straight track case is just a circular curve of infinite radius here. The method is based on results of numerical simulation. Authors use such results to verify and present corresponding procedure applied while investigating stability in curves. Results of simulation enabled to show how the problem looks for a particular vehicle as well as to analyse stability for objects' variants. The analysis includes influence of angle of attack, cant deficiency and excess as well as suspension parameters on vehicle's stability properties and also comparison of stability for 2-axle vehicle and a bogie of 4-axle one.