Abstract—This article presents a comprehensive analysis of the permissible speeds of railway rolling stock during straight-line motion and when navigating curves with various radii. The study addresses the growing demand for higher operational speeds while maintaining safety standards and infrastructure integrity. The objective is to determine the dynamic and structural constraints that limit permissible speeds under different track conditions. The research methodology is based on analytical calculations and numerical modeling of the interaction between the rolling stock and the track infrastructure. Key factors considered include the dynamics of vehicle movement, structural strength of the metal constructions, the impact on the track, unbalanced acceleration in curves, and stability against wheel derailment. Special attention is given to the assessment of lateral forces and their influence on both vehicle and track components. The results demonstrate how permissible speeds vary with track curvature and construction characteristics. The study identifies threshold values for unbalanced acceleration and lateral forces, which serve as critical criteria for speed limitations. The findings can be applied in the design and modernization of railway vehicles, the development of infrastructure guidelines, and the formulation of regulatory standards aimed at improving operational safety and performance in railway systems.

Keywords—railway track, curved section, rolling stock, locomotive wheelset, vertical dynamics, axial stresses in rails

Cite: Seidulla Abdullayev, Natalya Tokmurzina-Kobernyak, Azamat Alpeisov, Arailym Tursynbayeva, Assel Kurbenova, Aldabergen Bektilevov, and Daniyar Kerimkulov, "The Procedure for Establishing the Permissible Speeds of Semi-Wagons," International Journal of Mechanical Engineering and Robotics Research, Vol. 14, No. 5, pp. 487-499, 2025. doi: 10.18178/ijmerr.14.5.487-499

Copyright © 2025 by the authors. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).