bluuebunny/crossref_metadata_2025_split huggingface dataset:
Development of a methodology for determining an energy efficient technology for the freight transportation on a singletrack railway line
Authors: Prokhorchenko A. , Malakhova O. , Gurin D. , Sikonenko G. , Prokhorchenko G. 
Published: January 2021

Abstract
In the context of the search for strategies for the development of railway infrastructure, it is important to theoretically substantiate the choice of constructive and organizational measures that will allow the development of promising passenger and freight traffic. This study proposes an approach to determining the rational parameters of energy efficient technology for the transportation of freights on the site in the context of the implementation of one of the reconstruction measures - modern dispatch centralization of train traffic control. The main aim of research is to develop a methodology for determining an energy efficient technology for transporting freights on a single-track railway line. It is proposed to use analytical methods for calculating the average speed of trains with a combination of micromodeling of traction characteristics of freight trains of different mass. Theoretical calculations of the change in the section speed were carried out when the dispatch centralization was introduced, taking into account the choice of various options for the mass of freight trains. The calculations performed for a single-track line and the dependences of the cost change per one shipped carriage and the section speed on the train mass were obtained, which made it possible to determine the optimal parameters of the energy-efficient technology for the transportation of freights by the line. The proposed method for determining the energy efficient technology for the transportation of freights can be used in the technical and economic calculations of projects for the implementation of various systems of train dispatch control on single-track railway lines.
Calculation residual strength of reinforced concrete beams with damages, which occurred during loading
Authors: Blikharskyy Yaroslav , Vashkevych Rostyslav , Kopiika Nadiia , Bobalo Taras , Blikharskyy Zinoviy 
Published: January 2021

Abstract
The article presents the development of a method of experimental study of reinforced concrete beams with damaged steel reinforcement. In addition, the purpose is to conduct experimental tests of undamaged samples with steel reinforcement of 20- and 16-mm diameter. Also, the 20 mm steel bars were damaged to the area equal to 16 mm samples, experimental tests of such samples were performed and corresponding analysis and comparison of the results of both tests was conducted. According to the study program, 6 beam samples were tested. Two of them were undamaged control samples with single load bearing reinforcement of Ø20 mm diameter; 2 samples with Ø20 mm reinforcement had about 36% damages (which corresponds to area of the 16 mm diameter samples) and 2 samples with Ø16 mm single reinforcement, which corresponds to 36% load bearing reinforcement damage of control samples (the area of 36% damages of 20 mm samples corresponds to 16 mm diameter). The experimental study identified the strength and strain parameters of reinforced concrete beams with damages in the load bearing stretched reinforcement due to the action of the bending moment, which causes the exhaustion of the bearing capacity.
Strengthening of the reinforced concrete tank of anaerobic purification plants with the manufacture of biogas, damaged as a result of design and construction errors
Authors: Kramarchuk A , Ilnytskyy B , Hladyshev D , Lytvyniak O 
Published: January 2021

Abstract
The defects and damages of bearing structures (walls, covering) of the solid-cast reinforced concrete tank were identified and detected using visual and instrumental testing. The actual reinforcement of the tank was determined and coordinated with designed reinforcement. Furthermore, the deformations were measured, the cracks opening in the walls and its depth in the concrete were detected and was also the strength quality of concrete was defined. During the year of the operation, the tank developed a considerable system of cracks in all lateral walls from technological loadings. At the same time, the width of the crack opening exceeded the limit values for reinforced capacitive structures (wk), which is equal to 0.1 mm. The walls lost tightness, the use of the structure in the technological process was suspended. Checking calculations of the design solutions was carried out for the elements of the tank on technological loadings in the software package LIRA to find the causes of the cracks opening and water penetration in the walls of the reinforced concrete tank. It was determined that the existing design solutions did not ensure the bearing capacity and the fracture strength of bearing reinforced elements of the tank and its spatial rigidity from technological loadings. Necessary reinforcement was defined by ensuring the strength and possible limitation of the width of the cracks opening. This article presents the technical solutions concerning the strengthening of repair bearing elements of reinforced concrete spatial frame of the existing structure. The external bandages (reinforcing steel 4d32A400C) and inner tension bars (stainless steel round pipes 168 x 5 mm) were used as the strengthening of the reinforced concrete tank.
Methodical approach in determining the reliability and efficiency of urban cargo transportation taking into account the congestion of street networks
Authors: Kutiya O , Kravcov A , Gorodetska T , Voytov O 
Published: January 2021

Abstract
A methodical approach has been developed in order to assess the reliability and efficiency of urban cargo traffic, taking into account the congestion of street networks. Modelling the transportation process is carried out online and allows one to determine the parameters of the transportation process, which take into account the presence of traffic jams on the city streets. A criterion for assessing the reliability of the logistics system of cargo urban transportation has been proposed – the reliability coefficient and the integral criterion of efficiency. The criteria take into account the travel time of the vehicle along the route and the time of delays in accepting the applications for services at the logistics centre (LC), as well as the time of delays at the transport company. It has been shown that in the absence of delays in the logistic chains, the reliability coefficient is equal to one, and the efficiency criterion tends to a minimum. The role of the LC capacity in the unit costs of transport services has been determined. Insufficient capacity of the LC increases the processing time of one application, which leads to an increase in the total unit costs.
Reconstruction of Shallow Foundations Using Peracetic Silicate Solutions
Authors: Levenko H M , Aleksandrovych V A 
Published: January 2021

Abstract
The modern world is facing the acute issues of environmental pollution. Recently, they have begun to come out on top in the global relations and in the cooperation of various global business entities. The states allocate significant funds both for measures to prevent environmental pollution and to combat their consequences. The operating experience of many enterprises has shown that the issues of reconstruction of the foundations of existing buildings and structures are currently acute and urgent. One of the most effective types of soil consolidation is stabilizing with various binders, such as silication, bituminous grouting, tarring, cementation. As economic exploitation of soils intensively increases, various pollutants, both organic and nonorganic, affect them by deteriorating their composition, structure and properties. Different types of soils react differently to pollutants, some of them are more “sensitive” to them while others are less “sensitive”. Pollution and environmental deterioration of soils due to the uncontrolled accumulation of various industrial wastes in the soils are the main problems. In this regard, under current conditions, along with the elimination of sources of pollution, it is necessary to develop new methods and technologies to prevent pollution. Physiochemical methods can solve these problems.
Determining the Dependence of Fire Parameters in a Cable Tunnel on its Characteristics
Authors: Nuianzin Oleksandr , Sidnei Stanislav , Zayika Petro , Fedchenko Svitlana , Alimov Bogdan 
Published: January 2021

Abstract
In order to study the parameters of fires in cable tunnels both experimental methods and numerical simulations are used. The purpose of this article was to determine the dependences of the maximum temperature inside the cable tunnel during a fire, the duration of the fire in a local area of the cable tunnel and the time of reaching the maximum temperature inside the cable tunnel during a fire on its characteristics (cross-sectional area of the cable tunnel, fire load) inside the tunnel. In the course of the research a complete factorial experiment was developed and conducted. According to its results, the required regressions were obtained. Thus, there are reasons to believe that the obtained results of the study are the basis for the creation of mathematical models that describe fires in cable tunnels and can be used for engineering assessment of fire resistance of cable tunnel structures. In addition, computer simulation of heat and mass transfer in case of fire in cable tunnels was further developed.
Systems and subsystems of track, control and management of high-speed railway
Authors: Shevchenko A A , Matviienko O O , Lyuty V A , Manuylenko V G , Murygina N A 
Published: January 2021

Abstract
The article discusses the following issues: according to the current level of development and equipment of the existing network of railways in Ukraine, it is necessary to state the determination of the gauge of the high-speed line; the main characteristics of the highspeed rail system and the general requirements for laying the line; track systems and subsystems, as well as including their movement and control on free terrain, ensuring the safety of operation and transportation of passengers with the declared conditions of comfort and speed; the distance between the centres of the tracks increases in proportion to the speed of movement of passenger flows, which requires additional arrangement of the roadbed, taking into account the radii of the curves, the elevation of the outer rail, the angle of descent and ascent of the track, the equivalent taper, the slope of the rail, the profile of the rail head, such as rail and sleepers; lateral and vertical forces acting on the track. In order to ensure traffic safety at the maximum permissible speeds, it is necessary that the indicated vertical and lateral forces (static and dynamic) meet the requirements, which in turn depend on the above factors.
Features of assessing the evenness of road surfaces using laser road scanners
Authors: Smolianiuk R V , Smolianiuk N V , Kiashko I V 
Published: January 2021

Abstract
Road pavement evenness is one of the basic parameters characterizing road quality. Evenness influences car wear, fuel consumption, transportation costs, emotional state and comfort of drivers and passengers, and many other parameters. Assessment of road pavement evenness, which is widely used all over the world, has a number of features that do not allow to correctly assess an evenness at bridges, viaducts and other structures. Moreover, particularities of laser scanners operation do not allow to compare the obtained data with data obtained with the help of three-meter straight-edge. The paper suggests ways to solve problems in question, which enable significantly improving quality of evenness assessment at such important transport infrastructure objects as bridges, overpasses and viaducts. There is also a solution to compare the data of transverse evenness obtained by laser scanners with data obtained with the help of a three-meter straight-edge that will permit to use these data later for comparison with standard values.
Research of the behavioral of the wooden beams with fire protection lining under fire loading
Authors: Zmaha M I , Pozdieiev S V , Zmaha Y V , Nekora O V , Sidnei S O 
Published: January 2021

Abstract
This article highlights the current issues of ensuring the fire resistance of wooden beams as load-bearing structures. Scientists have studied various types of fire protection of wood from the effects of fire. In the existing methods of fire protection, fire-retardant impregnating materials, fire-retardant paint, commercial fire-retardant coverings are presented. In addition, a study on the creation of fire-retardant materials was conducted. Therefore, in the field of our research there are the issues of using fire-protective plywood as a fire-retardant cladding method of protection of wooden structures. This article describes the process of manufacturing fire-retardant plywood made of 2-millimeter sheet of veneer and impregnated with a flame retardant using the method of technological baths and glued in a pressed machine to the appropriate thickness. Then in the experimental setup, fire tests were performed at standard temperature for three intervals of exposure to determine the depth of charring. These studies make it possible to draw conclusions about the effectiveness of the proposed method of fire protection of wooden structures and to determine the calculated class of fire resistance for these structures.
Application of energy efficient materials in reconstruction of buildings and structures of transport infrastructure
Authors: Zolotov S , Pustovoitova O , Firsov P , Orel Y , Rezunenko M 
Published: January 2021

Abstract
The article analyzes in detail the results of the performed reconstruction works with the application of thermosetting polymers. The method of adhesive anchoring of reinforcement rods with fixing them in the concrete body with acrylic glue was carried out on transport infrastructure facilities (railway steam shop and railway itinerary post). It has been determined that strengthening the foundation with application of the thermosetting polymers (adhesive anchor joints) gives a significant reduction in the consumption of concrete, metal and labor costs. The advantage of such acrylic adhesives is the possibility of varying the ratio of monomeric and polymeric part (powder) containing redox system, within acceptable concentrations, without significant changes in adhesion and cohesion parameters. The obtained results are very important in practice, because in the conditions of preparation of the adhesive (especially in construction conditions) it is difficult to determine the exact number of components. The experimental research data can be used for attachment joints projecting and industrial technological lines development, as well as for further polymeric adhesive materials, widely applied in industrial and civil engineering, improvement.
The use of incineration waste to improve the properties of the bases
Authors: Zotsenko M L , Mykhailovska O V , Lartseva I I , Klymenko V V 
Published: January 2021

Abstract
Innovative ways of using furnace dust to improve the strength of soil-cement are analyzed. It is proposed to solve the environmental problem of utilization of this material, when using the addition of furnace dust during the construction of soil-cement elements. The samples were kept immersed in water for 28 days in order to gain strength, until laboratory tests. The removal ash before the experiment was sieved on a 4 mm sieve. Strength of soil-cement samples with the addition of furnace dust and pellet ash (with the main content of sunflower husk with a percentage of 5% by weight of cement) was studied. It is established that the average compressive strength of the samples with the addition of Mykolaiv CHP furnace dust with a fraction of inclusions up to 4 mm in the amount of 5 % increases the compressive strength by 30%. It was found that the content of organic matter (ash from burning sunflower husks) in soil-cement reduces its strength.
Carbon fiber plastics for vehicles manufactured by resource-saving formation technology
Authors: Bilym P , Rogozin A , Firsov P , Zolotov S 
Published: January 2021

Abstract
The advantages of the technology of molding carbon plastics based on pre-pregs with separate application of components (SAC-technology) of epoxy binders cured by the mechanism of migration polymerization of epoxy cycles are presented. Using the methods of linear dilatometry and dynamic mechanical tests, the molecular mobility of the segmental and local types in polymer matrices of carbon fiber reinforced plastics based on traditional mixed pre-pregs and binary pre-pregs with separate application of components has been investigated. The question of the influence of the activation ability of an acid catalyst during the curing of an epoxy binder on the degree of decrease in internal stresses and the realization of an increased packing density of polymer chains in the polymer matrix of the composite is considered. The importance of choosing an acid catalyst for the curing of a polymer binder is shown, which for CFRP composites provides the necessary combination of elastic and dissipative properties. The use of the considered binders makes it possible to improve a number of important operational characteristics, especially in the case of the production of large-sized products: solidity, crack resistance, impact resistance, fracture toughness. These properties are very significant during the composite materials applying in transport engineering.
Study on the prospects for the use of lubricants produced by Fuchs Lubritech GmbH on the Ukrainian railways in “wheel of rolling stock-rail” tribocoupling
Authors: Кravets Andrii , Vlasovets Vitaliy , Yevtushenko rii , Romanovych Yevgen , Кravets Anna 
Published: January 2021

Abstract
Controlling friction and wear of rolling stock wheels and rails is a very urgent task for railway workers and scientists in many countries of the world, including Ukraine. The use of lubrication of the wheel-rail friction pair is rather a promising way to solve this problem, and the success of the solution depends significantly on the choice of an effective lubricant. The article considers the results of study of Locolub ECO and Tramlub F 234 MOD 2 greases, taking into account the prospects for their use in locomotive wheel flange lubricators that are operated in the Ukrainian railway. The results of laboratory and operational tests of these greases in comparison with the currently used Relsol lubricant are presented and analyzed. Quite high tribological characteristics of Locolub and Tramlub lubricants and their compliance with the operating conditions of rolling stock, wheel flange lubricators and track lubricators are noted. Based on the results of operational tests, recommendations are given on the prospects for the use of the studied lubricants in the Ukrainian railway transport.
Use of modern logistics technologies in terms of saving resources
Authors: Lomotko D V , Prymachenko H O , Kovalova O V , Shkurenko O V , Hryhorova Y I 
Published: January 2021

Abstract
The necessity of research of modern logistic technologies is proved. The definition of “logistics technology” is given. The connection of technological and logistical operations with the Pareto principle is shown. The logistic technology “just in time” is considered, which once appeared in connection with the changing situation in the Japanese market, its basic principles are investigated. It is shown how this technology “just in time” became the foundation for the development and practical implementation of new technology “lean production”. The historical periods of introduction of “lean production” in various branches and evolution of the technology are considered. Also, the technology of Lean transformation system is offered which is based on 5 questions to the company, which seeks to increase its efficiency and ensures understanding how to implement effectively the principles, purpose and concepts of Lean manufacturing to make continual improvements to the operations of an organization. Methods, methodology and tools of Lean were reviewed on practical examples.
Principles of Energy-effective Land Use in Automobile Transport in Ukraine
Authors: Novakovska I O , Zholkevskyi P F , Stetsiuk M P , Ishchenko N F 
Published: January 2021

Abstract
The article studies contamination of the environment with motor transport and the objects of road infrastructure. It considers the experience of the European Countries in implementation of investment programs to modernize the transport and the infrastructure as a whole by their “ecologization” and “green transport” to minimize the negative impact on nature and preserve the competitive opportunities. It contemplates on types and sources of bio-fuel used in European countries determines the opportunities to grow the plants for alternative fuel production in Ukraine. The concept of “greening” in relation to the transport system of Ukraine have been considered, as in the scientific literature this concept is quite new. The authors outline the basic issues of the National transport strategy for the period till 2030 on the necessity to reduce the emissions of greenhouse gases into the atmosphere with movable sources, raising a share of public transport and electric vehicles, electrical buses, muscle-driven vehicles (bikes). The directions of providing the “greening” principle of the transport system of Ukraine have been offered. The necessity of introducing the “reservation” concept for the land of automobile transport to the following normative legal documents have been substantiated: National transport strategy till 2030, State strategy of development of highways, perspective plans of construction, reconstruction or expansion of highways and others. The article contains a plan of actions to decrease the influence of transport on the environment, namely through the implementation of power-saving technologies, the use of alternative fuels, renewal and extending possibilities to use electric transport. The comparative analysis of economical and ecological aspects of different types of transport – “green vehicles”.
Kinematics of motion of rotors of an orbital hydraulic machine
Authors: Panchenko A , Voloshina A , Luzan P , Panchenko I , Volkov S 
Published: January 2021

Abstract
There is no “rigid” kinematic connection between the centers of the rotors of the orbital hydraulic motor, which leads to non-standard changes in its output characteristics. A kinematic diagram of the movement of the rotors of an orbital hydraulic motor was developed, which made it possible to substantiate the kinematics of movement of its rotors and analyze the change in output characteristics. Abnormal changes in the output characteristics of this type of hydraulic motors are changes in the overall efficiency and changes in the angular speed of rotation of its shaft. When the gap between the rotors changes in the range of 0 to 0.4 mm, the overall efficiency of the positive displacement hydraulic machine decreases 3.6 times, which is explained by the increasing pour over between its rotors. The high value (0.92) and constancy of the volumetric efficiency of the orbital hydraulic motor is explained by the property of its rotors “self-sealing” in the process of moving, eliminating overflows. A decrease in the angular speed of rotation of the shaft of an orbital hydraulic motor 35 to 27 rad/s, with an increase in the gap of 0 to 0.4 mm, is explained by additional displacements of its inner rotor.