Collection of scientific works of the State University of Infrastructure and Technologies series "Transport Systems and Technologies"

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ISSN / EISSN : 2617-9040 / 2617-9059
Total articles ≅ 138
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D. Bulich, S. Sapronova, V. Tkachenko, A. Koshel
Collection of scientific works of the State University of Infrastructure and Technologies series "Transport Systems and Technologies" pp 43-53; doi:10.32703/2617-9040-2020-36-5

Abstract:
All elements of load-bearing metal structures of freight cars are subject to corrosion wear. In this article, a statistical analysis of corrosion wear for each element of load-bearing metal structures. Damage to load-bearing metal structures of gondola cars taking into account corrosion wear is considered. Measures to increase the possible maximum corrosion wear, which can be used to predict the residual life and structural finishing of the elements of load-bearing metal structures. Cracks and fractures that are not detected in time, which turn into through-corrosion during operation, have a great impact on corrosion. To determine the corrosion of the freight car requires an individual approach to each element of the load-bearing structures of the car, taking into account the performance and time of repair.Studies have shown that half of freight cars were operated with corrosion of some elements of load-bearing metal structures more than 30%. This shows the possibility of increasing the tolerance of the threshold of corrosion wear of cars, which will affect the ability to reduce the exclusion of freight cars from the inventory.
A. Kichkin, E. Kichkina
Collection of scientific works of the State University of Infrastructure and Technologies series "Transport Systems and Technologies" pp 94-103; doi:10.32703/2617-9040-2020-36-10

Abstract:
The article presents a simulation model of a seaport grain terminal, created in the AnyLogic 8.5 PLE environment. The agent paradigm was chosen as the modeling paradigm, which allowed to adequately reproduce the process of interaction of road, rail and industrial transport in the process of grain processing. To this end, the main models-agents have been developed that interact with each other and form the overall technological process of grain processing by the marine terminal. The interaction of the created agents-models makes the logic of interaction of different types of transport and production and storage systems of the grain terminal of the seaport. On the basis of an experimental study of the grain terminal of the seaport in different technological conditions, its adequacy was confirmed taking into account the interaction of different modes of transport: main (sea, rail, road) and industrial transport of the grain terminal. For information support, an information-analytical part was created, the basis of which is a database of a simulation model of a grain terminal of a seaport with the appropriate software. The creation of a database of the grain terminal of the seaport provided the primary information of the simulation model; accumulation of information on the results of simulation experiments; the possibility of analytical study of the results of simulation experiments. The corresponding calculation of economic indicators of functioning of the export grain terminal is made on the basis of the accumulated data of simulation modeling by means of the developed software which has allowed to provide efficiency not only technological, but also economic decisions. The developed simulation model of the grain terminal of the seaport and its information-analytical part is in fact a system of decision support by the relevant services of the terminal in the conditions of variable information from customers, the presence of technological and natural risks.
N. Radkevich, S. Sapronova, V. Tkachenko
Collection of scientific works of the State University of Infrastructure and Technologies series "Transport Systems and Technologies" pp 54-62; doi:10.32703/10.32703/2617-9040-2020-36-6

Abstract:
In order to ensure the uninterrupted performance of passenger traffic, the task of ensuring the operation of rolling stock outside the extended service life, including passenger cars for the carriage of passengers, remains relevant. Based on this, there is a need for comprehensive research aimed at substantiating the possibility of ensuring operation while maintaining dynamic and strength characteristics. The article examines the residual life of load-bearing metal structures of passenger cars based on the results of technical diagnostics and standard tests. It is concluded that the condition of the load-bearing metal structures of passenger cars built by the Kryukiv Carriage Plant (KСP) after long operation does not approach the limit. The obtained practical and theoretical results make it possible to extend the service life of passenger cars for the construction of KCP beyond the factory set by 41 years.
E. Shikula
Collection of scientific works of the State University of Infrastructure and Technologies series "Transport Systems and Technologies" pp 121-131; doi:10.32703/2617-9040-2020-36-13

Abstract:
The model of nonlinear deformation of a layered material with physically nonlinear layers is proposed. The laminate is considered a two-component material with random layers. The basis is the stochastic differential equations of the physically nonlinear theory of elasticity L.P. Khoroshun. The solution to the problem of the stress-strain state and effective properties of the composite material is constructed by the averaging method. An algorithm for determining the effective deformable properties of a layered material with physically nonlinear layers has been developed. The solution of nonlinear equations taking into account their physical nonlinearity is constructed by an iterative method. The law of the relationship between macrostresses and macrostrains in a layered material and the dependence of average strains and stresses in its layers on macrostrains has been established. Curves of material deformation are plotted for different values of the volumetric content of its filler. The dependence of the effective deformative properties of the laminated material on the volumetric content of the filler has been studied. The effect of nonlinearity of layers on the deformation of a layered composite material is investigated. It was found that the nonlinearity of the layers significantly affects the effective deformative properties and the stress-strain state of laminated materials.
I. Martynov, A. Trufanova, V. Petukhov, M. Serhiienko
Collection of scientific works of the State University of Infrastructure and Technologies series "Transport Systems and Technologies" pp 72-81; doi:10.32703/2617-9040-2020-36-8

Abstract:
The article considers the issues of analysis of the patterns of operation of the bearing elements of the bodies of carriage. The fleet of carriage mainly consists of models developed and manufactured in the 70-90s of the last century at car plants in Germany and Russia. They are obsolete both morally and physically. A comparative analysis of the size and nature of the operation of structural elements of both compartment cars and open cars. The results of the study made it possible to consider the issue of further use of carriage, which are most affected by corrosion. Key words: carriage ,operation, rolling stock; corrosion, inventory, technical condition. The results of the study made it possible to consider the issue of further use of passenger cars, which are most affected by corrosion.
N. Provatorov, I. Ovcharuk
Collection of scientific works of the State University of Infrastructure and Technologies series "Transport Systems and Technologies" pp 63-71; doi:10.32703/2617-9040-2020-36-7

Abstract:
With the development and distribution of embedded control systems for industrial and household equipment, the generation of speed trajectories for systems controlled by motors, other rotary mechanisms and units remains an urgent task. Adjusting the acceleration profile improves the quality of the system, and the use of adaptive design of automatic controls theoretically increases the speed of work. Implementation of compulsory software control of the speed profile or its automatic generation, according to the current parameters of the system, reduces the risks associated with the human factor and protects the system from operator inaccuracy. Reducing the factor of undesirable interference and creating a model of controlled environment increases the level of production safety, therefore, improving and modernizing the existing approach to managing high-speed industrial systems is a necessary condition for its further development. This article proposes to consider an improved model of a software speed controller that controls the pulse driver of a stepper motor. Based on existing research and corporate solutions during production development used experimentally the adaptive design of the state machine of the system, makes it possible to vary the speed of rotation of the stepper motor during the operation of the system in real time.
D. Kruhlyi
Collection of scientific works of the State University of Infrastructure and Technologies series "Transport Systems and Technologies" pp 143-149; doi:10.32703/2617-9040-2020-36-15

Abstract:
Today, humanity has faced a fundamentally new catastrophe - the Covid-19 pandemic. Quarantine, closing borders, creating numerous problems for almost all states - all these are the realities of today. Experts will still be able to fully assess the scale of the economic shock associated with the epidemic and all its long-term consequences. But it is already clear that the recovery of the global economy is not an easy one. And already tested anti-crisis measures will not always work. It is necessary to look for fundamentally new, non-standard solutions. The aim of the research is to analyze the state of trade against the background of the global world economic situation. Identify the shortcomings of the industry, development prospects and highlight the economic benefits that need to be addressed as a matter of priority in order to improve performance and improve the situation during a pandemic. The article examines the current state of the global economic situation in the maritime transport industry during the Covid-19 pandemic. The international market of maritime trade is based on certain patterns, among which there is a clear focus on the parameters of international economic relations, the constant use of innovative technologies and the cyclical changes in key indicators. The trend of development of the maritime transport industry and its regionalization is due to a complex set of external and internal factors. Therefore, the article considers the relationship and impact of both negative and positive factors on the state of the world economy. The data of the interim economic forecasts for 2019-2022 in the estimated comparison of countries that have a global impact on the economic development of partner countries are studied. The interrelation of economic and maritime industries is analyzed, the state of modern problems of sea transportation is investigated, perspective directions are revealed and the necessity of concrete decisions for large-scale development of competitiveness of the transport industry is emphasized. As a result of the research it is suggested: in order to automate the process of sea transportation to accelerate the introduction of contactless document management, to consolidate the position of maritime logistics, which plays an important organizational and cost-effective role in modern economic relations and trade flows.
A. Falendysh, A. Gatchenko, O. Kletska, E. Kiritseva, M. Barybin
Collection of scientific works of the State University of Infrastructure and Technologies series "Transport Systems and Technologies" pp 132-142; doi:10.32703/2617-9040-2020-36-14

Abstract:
The article considers the issues of determining rational approaches to the creation of train maps, the rational use of diesel modes and the use of automated computer simulation system. Based on the obtained results, an energy-efficient mode of train driving is proposed and a mathematical model of the locomotive operation character is created. There is a need to review obsolete regime and train locomotive crews in the latest methods of operation. The basic values and methods of calculation for specific operating conditions on the basis of the law of conservation of mechanical energy are established. It is proposed to create a passport of each locomotive to determine the rational weight norms on the existing service shoulders. After all, overloading or underutilization of the locomotive's resource is associated with loss of profit or the emergence of emergencies. The necessity of the offered methods within the limits of ecological requirements to traction rolling stock is proved. The possibility of forming a rational system of mileage between technical inspections and repairs for each locomotive as a whole on the basis of forecasting and statistics is determined. It is recommended to further implement mathematical modeling and digital means of monitoring the technical condition after repairs to achieve economic efficiency of railway transport.
O. Fomin, S. Kara, P. Prokopenko, M. Gorbunov, V. Fomin
Collection of scientific works of the State University of Infrastructure and Technologies series "Transport Systems and Technologies" pp 33-42; doi:10.32703/2617-9040-2020-36-4

Abstract:
As part of the work, a theoretical and experimental study (based on running dynamic tests) of the running qualities of empty hopper cars, converted from cement trucks and mineral trucks, was conducted. Computer simulation of the dynamics of empty hopper wagons converted from cement and mineral wagons depending on the condition of the track, the technical condition of the wagons and the weight of the container, the repeated presence of maximum vertical deviations and horizontal deviations of the track. A significant disadvantage of the railway transport of Ukraine is the limitation of the speed of trains with individual freight cars in an empty state, which are equipped with carts model 18-100. Among the reasons for the descent of the wheels of cars from the rails are: malfunctions of the running gear of the cars (fracture of the side frames and spring beams of the carts, malfunctions of the roller bearings of the axle box), wear of friction damper elements, unacceptable deviations and upgrades. As part of the work, a theoretical and experimental study (based on running dynamic tests) of the running qualities of empty hopper cars, converted from cement trucks and mineral trucks, was conducted. Computer modeling of the dynamics of empty hopper wagons, converted from cement and mineral wagons depending on the condition of the track, the technical condition of the wagons and the weight of the container and studies of the dependence of the wheel stability on the east.
M. Botvin, A. Gertsiy
Collection of scientific works of the State University of Infrastructure and Technologies series "Transport Systems and Technologies" pp 112-120; doi:10.32703/2617-9040-2020-36-12

Abstract:
The article is an overview of the direction of graphic image processing based on clustering algorithms. The analysis of prospects of application of algorithms of cluster analysis in digital image processing, in particular, at segmentation and compression of graphic images, and also at recognition of images in transport sphere of activity is carried out. Comparative modeling of such algorithms of cluster analysis as K-means, Mean-Shift (clustering of average shift) and DBSCAN (based on density of spatial clustering for applications with noise) on various types of data is carried out. The simulation was performed on synthetic datasets in a Jupyter Notebook environment using the Scikit-learn library. In particular, four data sets were generated in this environment, to which these clustering algorithms were applied. The simulation results showed that the K-means algorithm can effectively describe relatively simple shapes. In contrast, the mean shift does not require assumptions about the number of clusters and the shape of the distribution, but its performance depends on the choice of scale parameters. The DBSCAN algorithm can successfully detect more complex shapes, which emphasizes one of the strengths of this algorithm - the clustering of arbitrary data. The disadvantages of the selected algorithms are also given and it is indicated on which types of images they effectively work with the estimation of computational speed.
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