Browsing by Author "Nastechik, Nicolai P."
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Item Investigation of KPP-5 Rail Fastener Elastic Deformation(Universiti Malaysia Pahang, Malaysia, 2018) Marcul, Ruslan V.; Nastechik, Nicolai P.; Kovalchuk, Vitalii V.; Hnativ, Yuriy M.EN: For a long period of operation, a number of shortcomings have been identified in KPP-5 fastener that is mainly due to an intensive decrease of pressing force of the rail on leepers. This leads to the appearance of frequent cases of track displacement and fastening elements failure. To verify such hypothesis, the process of power work of KPP-5 fastener during railway track operation was researched. The technique and practical means of controlling the power work of KPP-5 fastener are developed. The influence of various factors of the rail pressing force on the sleeper is determined. The main influence is conditioned by under-rail wear (50.4%). The obtained results made it possible to formulate recommendations for the improvement of KPP-5 fastener where the methodology and practical means of controlling the power work of KPP-5 fastener were proposed. At the same time, it allows increasing the reliability and safety of the rail track during the entire overhaul period.Item Prospects for Laying the Fastening of the Type СКД65–Б in the Curvesd Track Sections with Small Radius(Дніпропетровський національний університет залізничного транспорту імені академіка В. Лазаряна, Дніпро, 2016) Nastechyk, Mykola P.; Nastechik, Nicolai P.; Marcul, Ruslan V.EN: Purpose. To date, there is a tendency concerning complete transition of main tracks to concrete sleepers. The reason for this is the lack of wooden sleepers, their high cost and low lifetime that in the curved track sections with the radius R≤300 m is only 5-7 years (this is 5 times less than the lifetime of concrete sleepers). After introduction of fastening type СКД65-Б it is possible to smoothly expand the track from 0 mm to 14 mm, and to narrow from 0 mm to 28 mm with a step 1 mm. At the increased train load on the track of 75…130 kN in a horizontal plane, which is characteristic for the curved track sections R≤300 m the violations in terms of track geometry often take place. It results in the frequent surfacings, periodicity of which at the fastening type СКД65-Б is absent for today. Therefore the purpose of the article is the development of recommendations concerning maintenance of the track in a plan with the fastening type СКД65-Б. Methodology. The methodology of research is based on the comparative estimation of influence of the track width change dynamics on the periodicity of surfacing in the plan in the case of the use of fastening type ДО and СКД65-Б. Findings. With the help of the developed research methodology it was established that the first implementation of adjusting the track width at fastening type ДО is necessary to be executed on the 14th month and at the fastening type СКД65-Б on the 28th month of operation. Originality. It was first described and expressed using the empiric dependence the process of the track width change, and periodicity of its adjusting in the case of the fastening type СКД65-Б use. Practical value. The developed recommendations will allow in time to execute adjusting of the track width at fastening type СКД65-Б and ensuring the safety of train motion at the same time.Item Stability Issues of the Continuous Welded Rail Track on the Concrete Sleepers on the Curves with Radius R ≤ 300 m(Sciences in Cold and Arid Regions, 2013) Rybkin, Viktor V.; Nastechyk, Mykola P.; Nastechik, Nicolai P.; Marcul, Ruslan V.EN: This paper describes the economic and technological benefits of installing continuous welded rail (CWR) track on sharp (radius ≤300 m) railway curves. A new form of prestressed concrete sleepers developed by the V. Lazaryan Dnipropetrovsk National University of Railway Transport is shown to improve the lateral shift resistance of CWR track in sharp curves and the use of anchor sleepers on tangents is shown to make it possible to lower the fastening temperature of the CWR track in order to increase the rail lifespan.