Наукові публікації в рамках виконання держбюджетних науково-дослідних робіт
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Browsing Наукові публікації в рамках виконання держбюджетних науково-дослідних робіт by Author "Fomin, O."
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Item Creation of the image of the new generation freight car bogie.(2018) Gorbunov, M. I.; Kara, S.; Nozhenko, O.; Fomin, O.; Vaičiūnas, G.; Petrenko, V.Analysis of the operating problems of freight car bogies are carried out, analysis of the reasons for low dynamic qualities, which do not allow to increase the speed of movement. The main directions of the development of the bogies constructions are substantiated. The image of the new generation freight car bogie is formulated based on analysis, ideas of car building projects using the method of intellectual decision support. Concept image and patented technical solutions for implementation are solving the problem of minimizing the weight of the bogie (increasing of coefficient of mass utilization) by using a modular design, application of elastic-damping structures, prestressed state of structural elements. Technical solutions improve the strength characteristic and dynamic properties of the freight car bogies on the basis of the above principles of engineering.Item Investigation of the dynamic loading of a body of passenger cars during transportation by rail ferry.(2019) Lovska, A.; Fomin, O.; Horban, A.; Radkevych, V.; Skok, P.; Skliarenko, I.To ensure the safety of passenger carriages by rail ferries, mathematical modeling of dynamic loading is performed. The accelerations are determined as components of the dynamic load acting on the body of a passenger car. This takes into account the actual hydrometeorological characteristics of the water area of the railway ferry. The calculations are made in relation to the railway ferry "Mukran", which moves the Baltic Sea. The model takes into account that the car body is rigidly fixed relative to the deck and during the oscillations of the railway ferry follows the trajectory of its movement. The solution of the mathematical model is implemented in the Mathcad software environment using the Runge-Kutta method. It is established that the maximum value of the acceleration acting on the car body is 1.8 m/s2. Determination of the dynamic loading of the passenger car body during transportation by sea is also carried out by computer simulation. The calculations were carried out in the CosmosWorks software package using the finite element method. Numerical values and acceleration distribution fields are obtained relative to the carriage body structure of a passenger car. A modal analysis of the car body during transportation by rail ferry is carried out. The numerical values of the critical frequencies and waveforms are obtained. To check the adequacy of the developed models, a calculation is made according to the Fisher criterion. It is established that the hypothesis of adequacy is not rejected. The research will contribute to the creation of recommendations on the safety of passenger carriages by railway ferries, as well as the manufacture of their modern structures in terms of car-building enterprises.Item The Substantiation Of The Concept Of Creating Containers With Viscous-Elastic Connections In Fitting.(2019) Fomin, O.; Lovska, A.; Daki, O.; Bohomia, V.; Tymoshchuk, O.; Prokopenko, P.The article presents the results of the substantiation of the concept of creating new-generation containers with viscous-elastic connections in fitting. For this purpose, a mathematical modeling of the dynamic loading of containers placed on a flat wagon while maneuvering concussion was carried out. The optimal parameters of elastic-viscous bonding in fittings are determined, in which the value of the dynamic loading of the carrier structure of the container does not exceed the normalized value. The carried out researches will promote creation of new generation containers with improved techno-economic and ecological indicators.