Features of the Interaction of the Track and the Rolling Stock With the Presence of Initial Roughness on the Surface of the Rolling of Rails

Abstract

Збірник наукових праць Українського державного університету залізничного транспорту Збірник наукових праць УкрДУЗТ, 2018, вип. 178 69 влиянии величины заводских неровностей на уровень вертикальных сил. Уровень этих сил выше (при прочих равных условиях) на рельсах украинского производства. Ключевые слова: железнодорожный путь, рельсы, подвижной состав, силы взаимодействия, расчетная схема, неровности, поверхность катания.The article deals with issues related to the interaction of the railway track and rolling stock. In particular, as a computational scheme of the railway track, it is proposed to use a scheme in which the rails are supported by separate supports that have nonlinear elastic-dissipative characteristics, which, according to the authors, most accurately describes the power processes in the "carriage-track" system. Since the originally proposed design scheme was supposed to be used for operational conditions of railways of industrial transport, its preliminary adaptation was carried out, taking into account the structural features of the rolling stock of the main railway lines of "Ukrzaliznytsya". Based on the prospects for introducing high-speed traffic in certain sections of the regional branches of "Ukrzaliznytsya", in addition to the main factors affecting the overall stress state of the railway track, the initial roughnesses on the rolling surface of rails are introduced into the calculation models. The comparative analysis of the requirements for the straightness of rails of domestic and foreign production, showed significant differences, both in terms of the tolerances allowed, and in approaches to controlling this indicator. This allowed, modeling the most unsuccessful combinations of irregularities along the entire length, as well as at the end sections, to carry out multivariate calculations to determine the vertical forces, depending on the magnitude of the initial unevenness on the rolling surface of the rails. The rails of domestic production and foreign were taken as settlement ones. The results of the calculations show the undoubted influence of the magnitude of the factory roughness on the surface of the rolling of rails on the level of vertical forces. The level of these forces is higher (with other things being equal) on the rails of Ukrainian production.