Govorukha V.V., Makarov Yu.A. Semidetnaia L.P. Іncrease in wear resistance and stability of a rail track of small-diameter curvilinear sections

Details

Parent Category: Geo-Technical Mechanics, 2018

Category: Collection of scientific papers «Geotekhnicheskaya Mekhanika» Issue 142

Geoteh. meh. 2018, 142, 103-113

DOI: https://doi.org/10.15407/geotm2018.142.103

INCREASE IN WEAR RESISTANCE AND STABILITY OF A RAIL TRACK OF SMALL-DIAMETER CURVILINEAR SECTIONS

Govorukha V.V., Makarov Yu.A. Semidetnaia L.P.

Authors:

Govorukha V.V., Candidate of Technical Sciences (Ph.D), Senior Researcher (IGTM, NAS of Ukraine)

Makarov Yu.A., Master of Science, Doctoral Student (IGTM, NAS of Ukraine)

Semidetnaia L.P., Master of Science, Leading Engineer (IGTM, NAS of Ukraine)

UDC531.43/46.004.624:625.143+629.024

Language: Russian

Annotation.

In the paper, operational life of the rail track components is analyzes by criteria of side wear of railheads under operational conditions with taking into account peculiarities of operation in small-diameter curvilinear sections. Factors effecting the above-norm side wear of rails within the sections of complex operational conditions were studied. Objective of the research was to increase operational life of the rail track through reducing side wear of the rail track and improving stability of the rail track under complex operational conditions. It is shown that rail rack facilities and their components are subject to intense wear and breaking at considerable shearing load, especially within curvilinear track sections with small curvature sections. Effect of the value of rail track curvature radii on formation of wear intensity and development of displacements of assembled rails and sleepers are considered. Basicfactors effecting rail wear intensity and track superstructure stability under complicated operational conditions (i.e. rail laying with small curve radii 200.0 m - 650.0 m; steep longitudinal slopes up to 30.0 % for descending and ascending train motion; considerable train weight up to 4600 t; rail quality; defects of intermediate fastening design in the context of rail width control and durability of basic parts) were determined.  Side wear intensity is reduced by 17 % at train ascending when weight of the train is decreased from 4600 to 4200 t , and by 14 % - at train descending within curvilinear areas with up to 300.0 m radius; within curvilinear areas with curvature 300.0 m-450.0 m it reduced by 8.4 % at train ascending, and by 20.7 % at train descending. Within curvilinear areas with curvature radii 450.0 m and more, intensity of side wear decreases by 2.2 % at train ascending, and by 8.0 % at train descending. Recommendations are given concerning reduction of side wear intensity and extension of rail track operational life as well as improvement of assembled rails and sleepers within curvilinear sections of small-diameter curvature, especially if connection joints are available. The obtained results may be applied in railway and commercial rail transport.

Keywords:

rail wear, curvilinear sections of rail track, loading, intermediate rail fastening.

REFERENCES

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About the authors:

Govorukha Vladimir Vasilyevich, Candidate of Technical Sciences (Ph.D), Senior Researcher, head of Laboratory of Mine Railway Transport in Department of Mining Transport Physics and Mechanics, M.S. Polyakov Institute of Geotechnical Mechanics of the National Academy of Science of Ukraine (IGTM, NAS Ukraine), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Makarov Yurii Alexandrovich, Master of Science, Doctoral Student, laboratory for rail transport problems of the department of physical and mechanical foundations of mining transport, M.S. Polyakov Institute of Geotechnical Mechanics of the National Academy of Science of Ukraine (IGTM NAS of Ukraine), head of the pioneering station number 1 branch "Center for Diagnostics of Railway Infrastructure AT" Ukrzaliznytsya "(PS-1 TsDZI), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Semidetnaia Lyudmila Pavlovna, Master of Science, Leading Engineer of Laboratory of Mine Railway Transport in Department of Mining Transport Physics and Mechanics, M.S. Polyakov Institute of Geotechnical Mechanics of the National Academy of Science of Ukraine (IGTM, NAS Ukraine), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

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