Revealing patterns in the stressed-strained state of load-bearing structures in special rolling stock to further improve them

Authors

DOI:

https://doi.org/10.15587/1729-4061.2023.285894

Keywords:

car, dump car, girder beam, dump car strength, calculated loads

Abstract

The object of research is strength indicators of load-bearing structures of special rolling stock (dump cars). The research problem is the appearance of the same type of cracks in the girder beams of dump cars, the repair of which is not provided for by the current repair documentation. Malfunction analysis, control tests, strength studies by calculation and experiment were carried out.

The analysis of malfunctions of cars in operation helped prove the place of occurrence of fatigue defects – the girder beam. This made it possible to determine specific zones of load-bearing elements, in which during control tests of cars, on the basis of taking into account data on fatigue defects, it is necessary to measure stress parameters.

The results of the control tests showed that the lowest value of the fatigue resistance reserve factor n=1.6 for the dump car is found in the zone on the girder beam in the area of the pivot beam. The value of n is within acceptable limits.

Normative calculations were carried out and a separate calculation (emergency) mode was additionally defined in the SolidWorks Simulation 2019 software package (France). Based on the results of the dump car stress calculations, it was established that the maximum equivalent stresses in the load-bearing structures of the car occur during its unloading due to twisting, and the stress vectors are at an angle of 45°. During the calculation of individual load modes, the stresses exceed the permissible values.

In order to ensure the necessary strength conditions, it is proposed to introduce a reinforcing pad into the girder beam of the dump car, due to which the calculated stresses are within the permissible limits.

The research will contribute to devising the recommendations for the restoration of dump cars, for designing modern structures of special rolling stock, and for improving strength determination processes

Author Biographies

Oleksii Koshel, State University of Infrastructure and Technologies

Postgraduate Student

Department of Railway Carriage and Railway Carriage Property

Svitlana Sapronova, State University of Infrastructure and Technologies

Doctor of Technical Sciences, Professor

Department of Railway Carriage and Railway Carriage Property

Serhii Kara, Branch of Science-Research and Design-Engineering Institute of Railway Transport of the JSC “Ukrainian Railways”

PhD, Head of Department

Department of Engineering

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Revealing patterns in the stressed-strained state of load-bearing structures in special rolling stock to further improve them

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Published

2023-08-31

How to Cite

Koshel, O., Sapronova, S., & Kara, S. (2023). Revealing patterns in the stressed-strained state of load-bearing structures in special rolling stock to further improve them. Eastern-European Journal of Enterprise Technologies, 4(7 (124), 30–42. https://doi.org/10.15587/1729-4061.2023.285894

Issue

Vol. 4 No. 7 (124) (2023): Applied mechanics

Section

Applied mechanics

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Copyright (c) 2023 Oleksii Koshel, Svitlana Sapronova, Serhii Kara

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