bluuebunny/crossref_metadata_2025_split huggingface dataset:
Influence of the structural design of rail fastenings on ensuring the stability of track gauge in operating conditions
Authors: Aharkov O V , Tverdomed V M , Boiko V D , Kovalchuk V V , Strelko O H 
Published: December 2019

Abstract
As the rolling stock speed increases, the requirements for stability parameters increase accordingly. One of these parameters is the track gauge. The stability of this parameter depends on many of the structural elements of the upper track structure and on the environmental conditions. In the research work, the authors have considered the influence of such a structural element as an intermediate rail fastening on its ability to provide a stable track gauge. The most common intermediate rail fastenings on the Ukrainian Railways have been accepted to be compared, including the KB-65 type fastening, the KPP-1 type fastening and the KPP-5 type fastening. In order to determine exactly the influence of each structural element, the other gauge parameters for all three types of fastenings have been taken equivalent. The data have been obtained from the track measuring car. With the obtained data, a statistical analysis has been conducted, which enables to draw conclusions about the ability of the intermediate rail fastenings under consideration to ensure the track gauge stability. The conclusions have been made on the applicability of each of the fastenings under consideration.
Methods of Imposing Restrictions on Land Management in Planning of an Airport’s Transport Infrastructure
Authors: Dobryak D.S. , Novakovska I.O. , Nikolaiev K.D. , Skrypnyk L.R. 
Published: December 2019

Abstract
Aviation transport can have a significant impact on the environmental conditions of land adjacent to the airport. To achieve the purpose of the article, a set of general scientific and special methods of research was used, in particular: monographic analysis, abstract-logical, systematic approach, calculation and graphical, mathematical. The concept of ecological and economic assessment of land management restrictions for airport infrastructure is analyzed, since the legal regime and the specificity of their use are strictly regulated by legislative norms and standards. The assessment of constraints on the functioning of airport infrastructure should reveal the impact of transport accessibility on the environment of the airport and the growth of the economic development of the neighboring region. The need to model the future demand for motor transport around airports is justified, which requires the accuracy of forecasting any future trips to airports, for example, due to economic profit after the increase in local traffic, driven by population growth, demand for real estate ownership and business development. The principles of open space preservation and integration with adjacent transport routes are considered, taking into account the aesthetic expediency and meeting the needs of the population when forecasting, planning and designing the airport infrastructure. Preservation of the open space around the airport shall be controlled constantly to ensure proper functioning and development of the approach roads thereto. The results of the study are proposals for the implementation and application of the following principles of environmental and economic assessment of design solutions in the context of the interconnected operation of the aviation enterprise and territory around the aerodrome.
Assessment of the ecological state of soils in roadside territories using chemical and biological indication
Authors: Iurchenko V O , Ugnenko I B , Melnikova O G , Rachkovskiy O V , Ivanin P S 
Published: December 2019

Abstract
Chemical and bioindication studies of soils in the roadside areas of railways and highways have been carried out. The studies have shown that on the territories directly adjacent to the transport routes, the concentrations of the petroleum products in soils are 1.6-32.4 times exceeding the APC (approximate permissible concentration). The most substantive exceedances of the APC are recorded in the highways roadside spaces. We have investigated the dependence of the petroleum products concentration in the soils and their bioindication indices on the distance to transport routes. It has been established that the pollution of roadside soil by petroleum products decreases sharply at a distance of 10-15 m from transport routes. And bioindicators show different dynamics with increasing distance from the source of pollution (and, consequently, decrease in concentration of petroleum products in soils): the intensity of respiration of soils increases, and catalase activity decreases, which reflects its characteristic as an enzyme of stress.According to bioindication data, it has been shown, that the soils of the roadside space (especially, as for railways) retain high restorative potential.
System of designing livestock small-volumetric cooperative buildings
Authors: Nesterenko S V , Shchepak V V , Kariuk A M , Mishchenko R A 
Published: December 2019

Abstract
It was determined that the design system for livestock small-scale cooperative buildings is formed under the influence of a significant number of different factors, since it is necessary to take into account the adaptation of buildings to the environment and the peculiarities of the organization of their internal environment. In addition, livestock buildings have differences depending on functional characteristics, design solutions, used building materials, etc. An innovative solution that takes into account the variety of characteristics of the building’s internal environment as much as possible is livestock breeding low-volume cooperated buildings. These buildings have the specifics of functioning in the external environment, so the formation of an appropriate design system is necessary. For the effective functioning of such a system, its components consolidated on the basis of modeling. The design system model for livestock cooperative small buildings was developed taking into account the multifactorial influence of the external and internal environment of buildings, as well as design conditions, and the main components of the system were determined, the relationships between them and their characteristics. The proposed model of a design system for livestock low-volume cooperated buildings shows the interdependence of its components and describes the parameters of their interaction.
Reliability design of rotors for orbital hydraulic motors
Authors: Panchenko A , Voloshina A , Panchenko I , Titova O , Pastushenko A 
Published: December 2019

Abstract
The reliability of orbital hydraulic motors which are used in mechatronic systems with a hydraulic drive for active working tools on self-propelled machinery is a pressing engineering problem. To increase the reliability, a specific design method was proposed. It required development of a mathematical apparatus and a calculation algorithm. The mathematical tools allowed to realize the method for determination of hydraulic motor reliability by simulating changes in a technical state of the rotors in a hydraulic motor. A program, which has been developed, enabled modeling the conjugation of external and internal rotors. The program implemented an algorithm for the sequence of calculating the parameters for the external and internal rotors. The proposed program made it possible to obtain a three-dimensional image of zones with admissible interfaces which ensure the efficient and reliable operation of orbital motors. The modeling of working capacity change for an orbital motor has established some dependence. The changes in the number of teeth and overall dimensions of the rotor in the investigated range enabled to develop a standard size range for hydraulic machines, which operate in mechatronic drive systems for active working tools on self-propelled machinery.
About one aspect of effective building of bus traffic schedule with an approximate algorithm
Authors: Panishev A V , Kostikova M V , Skrypina I V , Levterov A I 
Published: December 2019

Abstract
The assignment problem belongs to the main tasks of combinatorial optimization. This is a special case of the transport problem. Special methods that allow finding the optimal solution from the set of possible ones have been developed for solving the transport problem. The assignment problem is used in transport to optimize the arrangement of the cars along the routes, in the process of distributing the drivers among the cars, and in the process of distributing freights along the production lines. This article considers the case when m n < during the search of optimal solutions in the assignment problem of a transport type. The authors offer an algorithm that allows us to build a bus schedule taking into account the current restrictions in the presence of which the passenger traffic is carried out. A theoretical assessment of time complexity of an offered procedure for constructing all optimal solutions to the assignment problem is presented. An example illustrating the operation of the constructed algorithm, which allows finding the whole set of optimal solutions in polynomial time is given. Recommendations on the use of the algorithm in practice are given.
GIS in the study of transport infrastructure of technogenic-deformed territories
Authors: Penkov V O , Astakhov V N , Sayapin A S , Bielikova N V , Bielikov E A 
Published: December 2019

Abstract
Timely application of GIS technologies is determined by the need to create an intelligent digital control system for spatial surveying and road data in combination with information resources about the real state of infrastructure facilities. It is necessary to use the techniques of data collection, processing, and analysis corresponding in accuracy, reliability, and efficiency, such as the tasks set for the GIS, as well as modern capabilities of computer technology and software. The current lack of the concept and methods of geoinformational support for the functioning of the transport infrastructure of cities in technogenic-deformed territories (TDT) makes the solution of this issue relevant. Today, it is technically feasible to create a space-time model of deformation processes based on data from many years of field studies also using methods of mathematical modeling of mining processes and surveying calculations. The main method of research is the analysis of field studies using GIS modeling, using mathematical and statistical methods. The source data are published materials of long surveying and geodetic observations and statistical materials created in previous years by various organizations of Ukraine.
Comparative analysis of the parameters of the strength of the subgrade at the transition to the higher axial loading up to 25 t
Authors: Radkevych A V , Petrenko V D , Tiutkin O L , Andrieiev V S , Mukhina N A 
Published: December 2019

Abstract
A review of the scientific and technical literature on the re-alignment of the route during the transition to high axial load from the accepted today (23.5 t/axis) to the perspective (25 t/axis) shows that in the stage of preliminary researches imitation modeling of the earth web by the finite element method (ITU) as the most convenient, accurate and illustrative of the known numerical methods. In order to provide recommendations on the strength of the subgrade when moving to a higher axial load up to 25 t/axis, an analysis was conducted, the essence of which was to compare the stress-strain state of the subgrade at two loads per axis: 23.5 t/axis (existing ) and 25 (perspective). All the geometric and deformation characteristics of the formation are taken from data on a two-track section with a height of embankment of 3. The deformation characteristics are chosen so that the working material of the formation is in accordance with the average indices of deformation capacity of the railways used. The ITU train load calculus makes it possible to obtain all the factors of VAT in it, which is the main purpose of the study of the strength of the earth cloth, and allows to forecast their development in the future.
Process features and parametric assessment of the emergence of the excessive wear for the brake pads of freight car bogies
Authors: Ravlyuk V , Ravliuk M , Hrebeniuk V , Bondarenko V 
Published: December 2019

Abstract
The article presents a new scientific approach to the problem related to the specific nature of the adverse biplanar critical friction wear profile of brake pads which is quite common in cars of Ukrzaliznytsya JSC, as well as in many countries where the so-called three-element bogies are used. In order to study the dual wear of brake pads during the operation, the statistical material was collected and processed in the specialized software STATISTIKA to obtain graphical dependences that confirm the results of theoretical research. In the conducted studies, the concept of dual friction wear of brake pads was first discovered as a phenomenon and introduced. The stages of formation of especially harmful wear on the working surfaces of brake pads causing the complex formation of adverse specific dual wear are shown. A new concept of the duality coefficient of frictional wear of brake pads has been introduced, and a formula for its calculations has been proposed, which has been tested in the calculations of the values of brake pressures of pads with dual wear to support the analytical studies.
Research of the calculation scheme for the brake lever transmission and construction of the load model for the brake pads of freight cars
Authors: Ravlyuk V , Ravliuk M , Hrebeniuk V , Bondarenko V 
Published: December 2019

AbstractIn the article, the points of load application effecting the pads and other parts of the freight car three-element bogie during braking is considered theoretically using the example of the 2D diagram of the brake rigging. The special differences between the operating conditions of the first and second triangles of the car brake rigging and their effect on the wear of the pads when the train is moving without braking are described. The different operating conditions of the triangles are described to establish a causal relationship regarding the abnormal wear of the brake pads of the three-element bogies. For the first time, a calculation algorithm of a more accurate approach to theoretical calculations was proposed to determine the actual pressing forces in the brake pads on the wheels of the bogies. It proves the existence of the theoretical error, which is now inherent to the design models of freight cars brake rigging elements. The obtained algorithmic equations will help assess the wear of the brake pads and its effect on the stress-strain state in order to guarantee the railway traffic safety during the relevant theoretical and practical studies.
Methodological bases of assessment of lands of a populated item, taking into account the influence of road networks
Authors: Tokarev M N , Dobrokhodova O V , Nesterenko S H , Radzinska Y B , Chubukyn R Y 
Published: December 2019

Abstract
The content of regulatory documents of Ukraine on the zoning of the territory of a settlement is analyzed. The possibility of using open geographic data to perform the above work is considered. The quality criteria of residential areas are established. Technique for a comprehensive point assessment of the territory based on weighted average indicators, including the results of mathematical GIS analysis of the territory and data of subjective expert assessment has been developed. The conducted GIS analysis of the territory clearly demonstrated the effectiveness of the integrated assessment method because it combines both a rigorous mathematical assessment of the mutual arrangements of the city elements and the subjective opinion of individuals. The practical use of the results of the assessment allows us to identify places of long-term development on the territory of the city, plan transport infrastructure, and establish technical and economic indicators for measures to develop urban infrastructure.
The use of intermittent wheels, impregnated by the contact method to reduce the thermal stress of the grinding process
Authors: Tonkonogyi Vladimir , Yakimov Alexey , Bovnegra Liubov , Sidelnykova Tetiana , Dašić Predrag 
Published: December 2019

Abstract
The proposed composition of solid technological lubricant applied to the working surface of the abrasive wheel directly in the grinding process. Experimental studies have been carried out to identify the effect of implanting on the normal and tangential components of the cutting effort and temperature that occur when grinding with abrasive wheels with continuous and intermittent work surfaces. It is established that when grinding with impregnated intermittent circles, the magnitude of the ratio Fz/Fy normal to the tangential component of the cutting force is less than when grinding with impregnated wheels with a solid working surface. It was established experimentally that the impregnation of the working surface of intermittent wheels reduces the thermal stress of the grinding process and increases the number of actively working grinding grains. The decrease in the Fz/Fy ratio during intermittent grinding with an impregnated wheel compared to dry intermittent grinding can be explained by a decrease in Fz with a simultaneous increase in Fy. A decrease in temperature when using solid lubricant indicates a decrease in the coefficient of friction of grinding grains with the processed material and, therefore, a decrease in the tangential component of the cutting force Fz. An increase in the number of actively working grains during grinding with intermittent impregnated circles compared to dry intermittent grinding indicates an increase in the normal component of the cutting force Fy. It is established that the maximum temperature during grinding with impregnated intermittent circles shifts towards the rear point of the contact arc compared to dry grinding, where the temperature reaches its highest value near the front point of the contact arc of a circle with the material being processed.
New design concepts for strengthening of continuous reinforced-concrete beams
Authors: Azizov T N , Kochkarev D V , Galinska T A 
Published: December 2019

Abstract
The present article is concerned with basic methods of reinforcement of continuous reinforced-concrete beam constructions. The main disadvantages and difficulties in strengthening such load carrying structures have been identified in this academic paper. There has been offered the method of reinforcement of continuous reinforced-concrete beam constructions. Besides, the authors have established the procedure of designing effective continuous reinforced-concrete beams in case of the reinforcement. The basic principle of enforcement of continuous reinforced-concrete beams is proposed in this exploratory development. This principle lies in the fact that it is necessary to find the desired span stiffness of continuous reinforced-concrete beam constructions, which would provide sufficient reinforcement in the reference section of the beams. In this case, there is no need to strengthen reference sections, which is practically impossible to do in most instances without dismantlement of the existing concrete floor slabs. For reinforcement systems designing, it is proposed to use the method of design resistance of reinforced concrete, which uses theoretically, and experimentally confirmed prerequisites and hypotheses. The calculations are made by the iteration method. There has been provided a calculation example of enforcement of continuous reinforced-concrete beam constructions using the proposed method.
Calculation of turning rigidity of I-section reinforced concrete elements with normal cracks
Authors: Azizov T N , Orlova O M , Nahaichuk O V 
Published: December 2019

Abstract
The article provides a methodology for calculating the torsion of an I-beam element using its approximation in the form of a cross-rod system. The cross-sectional I-section is divided into a finite number of longitudinal rods of rectangular section. These rods focus on their axial, flexural and torsional stiffness. Longitudinal rods are connected by transverse vertical and horizontal rods. The transverse rods imitate the local deformation of the longitudinal rods at their contact with each other. In contrast to the previously proposed methodology, in order to reduce the number of unknowns for creating the basic scheme of a statically indeterminate system, it is proposed that not all transverse rods be cut, but only one step in the longitudinal direction. The forces in the longitudinal rods determined from this calculation are applied to the rods of the next step. The pitch of the transverse rods may be arbitrary. A method for determining the stiffness parameters of the rods of an approximating system is shown. The advantages of the proposed methodology are shown, which can significantly reduce the number of equations unknown in the system, calculate elements for bending with torsion, and also take into account the change in stiffness as a result of nonlinear work of materials and crack formation.
The destruction of buildings walls brickwork on an unevenly deformed base
Authors: Kichaeva O , Dobrokhodova O 
Published: December 2019

Abstract
The article is dedicated to the analysis of the results of experimental testing of brick structures resistance. The experimental testing aimed at revealing a qualitative pattern of deformation and the character of losing the bearing capacity of a system “brick beam-wall – deformed base” and obtaining quantitative data about the strained and deformed state of the system undergoing short-term force and deformation at all stages of loading. Revealing the structure and phases of deformation and destruction of brickwork subjected to the increasing loading and the construction of dependences “loading – deformation” corresponding to the process of brickwork deformation and destruction was also an important task. It has been proved that the mechanism of the destruction of brick structures walls fragments, supported by uneven deformed base, occurs according to the scheme of shear, cut and breaking to pieces, as well as destruction of brick material and mortar with clear determination of deformation stages and brickwork destruction. The results of analysis of the experiments allowed to determine the influence of the amount of loading acting on cracks formation and brickwork functioning as a whole.
About need of calculations for the steel framework building in temperature influences conditions
Authors: Otrosh Y , Semkiv O , Rybka E , Kovalov A 
Published: December 2019

Abstract
In the article a technique of studying technical condition for steel structures that were damaged by high temperature impact, as well as a climatic effects on building structures due to the difference in ambient temperatures is described. Based on obtained data, there was made a conclusion about technical condition of the structures and possibility or inability to restore their serviceability by repair, reinforcement or replacement. There were conducted a comparative analysis of the results of experimental studies and numerical analysis. The mathematical model makes possible operative prediction for the controlled parameters values of building structures. In the article, examples about practical application of the techniques are described that allow doing technical examination of objects, damaged by temperature influence. The aim of this study is to substantiate the need to make calculations about temperature impacts for buildings with a steel frames and to develop measures to ensure the serviceability of steel structures of buildings and structures in conditions of temperature impact.