Numerical modeling of continuously welded rails elastic displacements in the presence of a braking factor for trains driven by modern locomotives
https://doi.org/10.52170/1815-9265_2025_74_103
Abstract
Modern approaches to the design, construction and maintenance of continuously welded rails do not fully take into account the specifics of their stress-strain state. In particular, the factor of train braking, as one of the most unfavorable factors of external influence on the continuously welded rails design, is not taken into account.
The need for a theoretical and experimental approach to increasing the reliability of assessing the continuously welded rails temperature reliability under variable operating conditions in the presence of a braking factor for trains pulled by modern and advanced types of locomotives is identified.
The article presents the results of continuously welded rails numerical modeling in the presence of an electrodynamic braking factor. The values of continuously welded rails elastic displacements obtained from the modeling results are compared with the results of full-scale experiments, with the calculated values according to the method of Professor N. I. Karpushchenko, with the calculated values according to the improved method, taking into account the railway line plan, the variability of the values of the adhesion coefficient of the wheel and rail, as well as the features of the locomotive braking modes. The spread of the values of elastic displacements found from the results of modeling and experiment is within 18 %, which indicates sufficient accuracy of the model.
A numerical model has been developed and verified using the finite element method. Theoretical principles for assessing the stress-strain state of a continuously welded rails in the presence of a braking factor using the finite element method are proposed.
The hypothesis that locally occurring longitudinal forces are initiated by a braking train in the continuously welded rails and affect its stability reserve is confirmed.
About the Author
I. K. Ardyshev
Siberian Transport University
Russian Federation
Russian Federation
Ilya K. Ardyshev – Lecturer of the Track and Track Facilities Department
Novosibirsk
References
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Review
For citations:
Ardyshev I.K. Numerical modeling of continuously welded rails elastic displacements in the presence of a braking factor for trains driven by modern locomotives. Bulletin of Siberian State University of Transport. 2025;(2):103-109. (In Russ.) https://doi.org/10.52170/1815-9265_2025_74_103
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