Specific features of the railcar kinematics causing rolling stock derailment when traversing turnouts

Igor Ermolenko; Dmitriy Koven'kin

doi:10.20295/2223-9987-2026-1-81-98

UDC 629.4.015 UDC 625.1

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SPECIFIC FEATURES OF THE RAILCAR KINEMATICS CAUSING ROLLING STOCK DERAILMENT WHEN TRAVERSING TURNOUTS Specific features of the railcar kinematics causing rolling stock derailment when traversing turnouts

АА Аа

Published in Bulletin of scientific research results · Volume 2026, Issue 1 · Pages 81–98 · Rubric: PROBLEMATIC OF TRANSPORT SYSTEM

DOI: https://doi.org/10.20295/2223-9987-2026-1-81-98

Received: 02.02.2026 Accepted: 03.03.2026 Published: 03.04.2026

Authors

Igor Ermolenko

Dmitriy Koven'kin

Igor Ermolenko

Academic degree: candidate of technical sciences

Science rang: docent

Irkutsk State University of Railway Transport docent · Vagony i vagonnoe hozyaystvo · Irkutsk

Dmitriy Koven'kin

Academic degree: candidate of technical sciences

Science rang: docent

Irkutsk State Transport University zaveduyuschiy kafedroy · Put' i putevoe hozyaystvo · Irkutsk

ABSTRACT

This study focuses on issues of improving train safety on challenging railway track sections, including mountain pass lines and station tracks, with a particular emphasis on the railcar-track system. Objective: to identify non-obvious causes and relationships leading to rolling stock derailment when passing through turnouts. Methods: this research adhered to the established methodological framework for investigating derailment incidents as sanctioned by the regulatory protocols of JSC “Russian Railways”. In addition, the Universal Mechanism software package was used to simulate and evaluate the dynamic behaviour of the railcar. Results: the findings indicate that localized degradation in specific rolling stock components, such as the automatic coupler, can induce significant lateral forces. These forces are sufficient to cause wheelset unloading, thereby an increased risk of derailment. The study analyzed the interaction between the wheelset and the track under standardized parameters, resulting in the generation of graphical dependencies illustrating the lateral and vertical forces arising at the wheel-track contact. Practical significance: the results of the study make it possible to reconsider the issue of rolling stock-track interaction by incorporating updated concepts regarding the internal and external kinematics of railcars. The investigation concludes that even minor deviations in the technical integrity of individual parts can have a profound effect on operational safety. Thus, the necessity for developing a more precise methodology for safety assessment based on these technical nuances.

KEYWORDS

safety of train operation, track switch, freight car, automatic coupling, rolling stock derailment, railcar kinematics

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GOST

Ermolenko I. E., Koven'kin D. A. Specific features of the railcar kinematics causing rolling stock derailment when traversing turnouts // Bulletin of scientific research results. 2026. no. 1. pp. 81-98. DOI: https://doi.org/10.20295/2223-9987-2026-1-81-98. (Date of access 13.10.2026).

MLA

Igor Ermolenko, Koven'kin D. A.. "Specific features of the railcar kinematics causing rolling stock derailment when traversing turnouts." Bulletin of scientific research results 2026.1 (2026): 81-98. DOI: https://doi.org/10.20295/2223-9987-2026-1-81-98.

APA

Ermolenko I. E., Koven'kin D. A. (2026). Specific features of the railcar kinematics causing rolling stock derailment when traversing turnouts. Bulletin of scientific research results, 2026(1), 81-98. https://doi.org/10.20295/2223-9987-2026-1-81-98

Chicago

Igor Ermolenko, Koven'kin D. A.. "Specific features of the railcar kinematics causing rolling stock derailment when traversing turnouts." Bulletin of scientific research results 2026, no. 1 (2026): 81-98. https://doi.org/10.20295/2223-9987-2026-1-81-98.

WIKI

{{cite journal | author = Ermolenko I. E., Koven'kin D. A. | title = Specific features of the railcar kinematics causing rolling stock derailment when traversing turnouts | journal = Bulletin of scientific research results | year = 2026 | volume = 2026 | issue = 1 | pages = 81-98 | doi = 10.20295/2223-9987-2026-1-81-98 }}

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SPECIFIC FEATURES OF THE RAILCAR KINEMATICS CAUSING ROLLING STOCK DERAILMENT WHEN TRAVERSING TURNOUTS Specific features of the railcar kinematics causing rolling stock derailment when traversing turnouts

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