Факультет "Транспортна інженерія" (раніше ф-т "Механічний")
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ENG: Faculty of "Transport Engineering" (formerly Faculty of Mechanical Engineering)
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Browsing Факультет "Транспортна інженерія" (раніше ф-т "Механічний") by Author "Baranovskyi, Denys"
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Item Determination of the Filler Concentration of the Composite Material to Reduce the Wear of the Central Bowl of the Rail Truck Bolster(Elsevier BV, 2023) Baranovskyi, Denys; Myamlin, Sergey; Podosonov, Dmytro; Muradian, Leonty A.ENG: During the operation of freight cars, uneven wear occurs in the central bowl of the rail truck bolster. This article aims to determine the concentration of the filler of the composite material to reduce the wear of the central bowl of the rail truck bolster. In this work, for the first time, a mathematical model of the distribution of the filler concentration in the projected composite tape was obtained. To reduce the wear of the working surface of the central bowl of the rail truck bolster, as well as to ensure uniform wear distribution, it is proposed to weld a composite tape with variable tribomechanical properties using contact welding. The wear value of the working surface of the central bowl of the bolster of the rail truck bolster when using composite tapes of compositions Fe-Cr-Ni-Cr3C2 and Fe-Cr-Ni-TiC with contact welding was 0.15–0.18 mm per 10,000 km - for a loaded freight car and 0.08–0.10 mm per 10,000 km for an empty freight car. According to the amount of wear, the value of the service life of the center plate assembly is predicted, which is 320,000–420,000 km.Item Determination of the Filler Concentration of the Composite Tape(MDPI, 2022) Baranovskyi, Denys; Myamlin, Sergey; Bulakh, Maryna; Podosonov, Dmytro; Muradian, LeontyENG: For the first time, a theoretical dependence was obtained to determine the filler concentration of the composite tape. On the basis of this dependence, a composite tape with variable mechanical and tribological properties can be obtained. It is proposed that the composite tape is welded onto the cylindrical surface of the central bowl of the rail truck bolster. The bench tests made it possible to determine the degree of wear of the central bowl of the rail truck bolster by means of a welded composite tape. The wear value of the central bowl of the rail truck bolster with welded-on composite tapes is 0.15–0.18 mm per 10,000 km of a freight car’s mileage. The predicted service life of the central bowl of the rail truck bolster with a welded-on composite tape is 320–420 thousand km.Item Determination of the Risk of Failures of Locomotive Diesel Engines in Maintenance(MDPI, 2023) Baranovskyi, Denys; Bulakh, Maryna; Michajłyszyn, Adam; Myamlin, Sergey; Muradian, Leonty A.ENG: This article presents a mathematical model of the risk of failures, depending on the operating parameters, of locomotive diesel engines. The purpose of this study is to determine the risk of failures of locomotive diesel engines in maintenance. The theory of probability and the theory of logic and reliability are used in this theoretical study. The innovations and main works are the first approaches to calculating the risk of failures of locomotive diesel engines by hourly fuel consumption, which, under operational conditions, allows for extending the life of locomotive diesel engines during maintenance. As a result, a maintenance process for 5D49 diesel engines is developed in a locomotive depot. When managing the maintenance processes of 5D49 diesel engines in the locomotive depot, it is determined that the optimal mileage is 45,000 km. The resource of 5D49 diesel engines in the locomotive depot increased by 2.4% in the management of the maintenance process compared to the existing maintenance system.