bluuebunny/crossref_metadata_2025_split huggingface dataset:
Rationale and frequency of the diagnosis of component parts of tractors Belarus in the development of technology maintenance
Authors: Karagodin V I , Khapugin R A 
Published: June 2020

Abstract
The article presents the solution of a new scientific and technical problem of substantiating the frequency of diagnosis and the composition of control and diagnostic operations performed during maintenance of machines based on Belarus-82.1. The methodology of justification of the specified parameters of technological processes of maintenance service takes into account the probability of failures in control periods and provides for increased reliability of cars. It is proved that manufacturers in some cases unreasonably increase the frequency of maintenance for advertising purposes. Experimentally determined parameters of the distribution laws of time between failures of component parts of machinery on the basis of the Belarus-82.1. The new dependence of the probability of the failure of the operating time of machines on existing and recommended strategies ensures their efficiency at all the intervals of achievements. The composition of control and maintenance operations for different types of maintenance is justified not only for warranty period and for the entire service life of the machine. The practical use of the research results presented in the article can significantly improve the reliability of equipment with a slight increase in the cost of maintenance.
Marine propulsion study of planning small-class amphibious vehicles
Authors: Karelina M Yu , Filatov V V , Klimov A V , Malakhov D Yu , Sorokin V G 
Published: June 2020

Abstract
The authors analyze the propulsion of the planing hulls of the various small-class amphibious vehicles. The magnitude of the resistance forces depending on the movement speed is determined experimentally. For the correct formulation of experiments and their results, the study of various models of the planing small-class amphibious vehicles must comply with the dynamic similarity of the viscous friction and gravity forces. To compare planning effect provided by the design features of various amphibious models a relative measure of the hydrodynamic qualities or its inverse value can be used. In this article, numerical simulation by means of software complex is conducted to determine the hydrodynamic properties of the different planing small-class amphibious models. To verify the adequacy and accuracy of the generated numerical model, a comparison of the computer simulation results with the data of the full-scale experiment is used. Propulsion performance is compared for amphibious models with different hull contours and additional equipment.
Regulation of liquefied petroleum gas consumption for a passenger car in the mountain conditions of the Republic of Tajikistan
Authors: Mirov B K , Panov Y V , Zenchenko V A , Bushuev P V 
Published: June 2020

Abstract
In the article the main results of research work to determine the consumption rates of liquefied petroleum gas (LPG) for a car brand KIA Optima are presented. The research was accomplished for high-mountain conditions of operating in the Republic of Tajikistan (RT). The basic factors, influencing fuel and economic indicators of the car in mountain conditions of operation, are considered, and the main analytical dependences, received on the basis of the developed mathematical models, are presented. The practical realization of the developed mathematical models allows for individual rationing of fuel consumption, taking into account the parameters of the mountain road and, accordingly, the assessment of the road complexity. On the basis of the experimental data obtained, graphical dependences of fuel consumption in mountain conditions of vehicle movement are constructed and presented.
The results of modeling and evaluating the relative slip coefficients during the interaction of the pneumatic tire with the supporting surface to determine the forces acting in the contact patch
Authors: Sova A N , Mazlumyan G S , Egorov O V , Shadrin S S , Sova V A 
Published: June 2020

Abstract
The article describes the results of modeling and estimates of the relative slip coefficients during the interaction of the pneumatic tire with the supporting surface in order to determine the forces acting in the contact spot. The justified and developed design scheme for the interaction of the wheel propulsion with the supporting surface is presented. The characteristics of the relative slip coefficients, the longitudinal traction characteristics are presented. Lateral traction characteristics, Matlab Simulink friction coefficient calculation procedure are proposed.
The results of modeling the physical processes of interaction of a pneumatic tire with a supporting surface to determine the forces acting in the contact patch
Authors: Sova A N , Mazlumyan G S , Egorov O V , Shadrin S S , Sova V A 
Published: June 2020

Abstract
The article presents the results of modeling the physical processes of the interaction of a pneumatic tire with a supporting surface in order to determine the forces acting in the contact spot. This justifies and develops a diagram of a generalized model of a Simulink car wheel, presents a Simulink circuit block for a mathematical model of a car wheel. Simulink circuit blocks are used for calculating displacements of the reaction application point for calculating the reaction point, the absolute speed and angle of rotation of the wheel, the force, angular and peripheral wheel rotation bones and rolling resistance forces.
The results of modeling and evaluating the dynamics of the movement of a wheeled tractor
Authors: Sova A N , Mazlumyan G S , Egorov O V , Eruslankin S A , Shadrin S S 
Published: June 2020

Abstract
The article describes the results of modeling and evaluating the dynamics of movement of a wheeled tractor. It presents blocks of Simulink schemes for calculating vertical reactions, the gravitational projection of a tractor, the drag force, and the dynamics of a tractor body.
Remote identification of damages of freight by means of transport telematics
Authors: Zaikin R , Filatov S , Komkova D , Efimenko D 
Published: June 2020

Abstract
The article informs about the possibilities of means of transport telematics, which are mentioned in the confirmation or refutation of the road accident and the assessment of possible damages during the road traffic accident. In addition, the article examines aspects of the practical application of information on the dynamic parameters of a vehicle obtained by means of transport telematics.
Prospects for estimating the pavements structural capacity based on rolling wheel deflection
Authors: Khroustalev B M , Veranko U A , Zankavich V V , Busel A U , Shang B , Shi J , Liu Yu 
Published: June 2020

Abstract
This article contains the results of the study of elastic deflection of semi-rigid pavement defined by the method of a rolling wheel (RWD) under different axial loads. For the investigations, an exclusive mobile complex was developed, allowing measurements to be made in a motion for various axial loads from 100 to 250 kN. It has been observed that the dynamic method of testing a semi-rigid pavement with a rolling wheel with different load levels allows determining non-linear characteristics of the deformation curve and deformation features of the package of asphalt concrete layers with appropriate loads, that cannot be done with the standard method of estimating the elastic deflection under a load of 100 kN. The results of the study can be used to develop criteria for assessing the strength, reliability, and deformability of semi-rigid pavement. It is possible to determine the likelihood of a joint failure-free operation of a rigid base and non-rigid layer with a resource forecast and the feasibility of its cold recycling.
Determination of the capacity of the two-lane acceleration lanes with a central island
Authors: Kostsov A V 
Published: June 2020

Abstract
Interconnection sections of exit ramps at different levels with motorways are one of the main sources of traffic hindrance, so special attention should be paid to ensuring the capacity of such areas. Dual-lane motorway connections are often made using two-lane acceleration lanes, with safety islands as a method of increasing their capacity. In order to develop recommendations for determining the capacity of such acceleration lanes, the author carried out experimental studies of the patterns of DLC maneuvers within the highways on the sections bordering the entrances. The studies were carried out by recording the trajectories of vehicles that perform a maneuver of exit from the entrance to the highway. On the basis of the carried out researches an improvement of a method of calculation of capacity of two-lane acceleration lanes is offered. The results of the studies are recommended for use in the design of highways and intersections at different levels of them, as well as for the reconstruction of the highway lanes in order to increase their capacity.
Improving the regulatory framework for the design of rigid pavements
Authors: Nosov V P , Ushakov V V , Fotiadi A A , Stepush A P 
Published: June 2020

Abstract
The study analyses local and foreign experience and trends in the field of improving the design of rigid structures of road pavements with the aim of a significant increase in their reliability and durability. It is shown that while ensuring the necessary quality of construction and timely completion of the full list of works on the current maintenance and repair of the construction of rigid pavements, they can serve without major repairs for 50 years or more. Based on the analysis, it was found that structures with a cement-concrete coating thickness of more than 30 cm on highly stressed highways have a resource of more than 100 million standard axial impacts. One of the factors hindering the practical implementation of new solutions is the lag in the development of the theory of calculation and the difficulty in determining the parameters necessary for calculation that characterize the properties of materials, taking into account their heterogeneity and variability during the designed service life. A catalog of rigid pavement designs is proposed based on the predicted number of standard axial impacts for the design life of the structure before overhaul.
Study of coarse-grained soils design characteristics
Authors: Pospelov P I , Rasulov T A 
Published: June 2020

Abstract
The article presents the results of deformation characteristic studies for soils containing various amounts of rock clastic material during its use as a working layer of the subgrade and the foundations of pavements. The studies were performed on coarse soil models using the geotechnical software package Plaxis, which avoided the cumbersome and laborious laboratory tests of soil mixtures. Also, to compare the obtained results of numerical modeling, an analytical analysis of coarse soil deformation conditions was performed. They presented the graphical representation of the relative strain and the deformation modulus of soils belonging to large-clastic varieties, as well as the pattern of their change depending on the percentage of fragments larger than 2 mm. Thus, it was first established that the dependence of the relative vertical deformations of soils on the quantitative content of the coarse fractions in them is strictly linear. However, as for its deformation modulus, the same dependence is no longer linear, but parabolic. The obtained patterns are confirmed by analytical calculations and processing of previously performed studies on physical models. They proposed the methods to refine the calculated characteristics of coarse soil with a varying amount of rock fragments for pavement calculation.
Aging of bitumen on the surface of crushed granite at high temperatures
Authors: Salikhov M G , Veyukov E V , Kalugin R Y , Yendeletov A O 
Published: June 2020

Abstract
When exposed to high temperatures, bituminous materials including mixtures of crushed stone and bitumen (black gravel) quickly change their physical and mechanical properties. In the process of heating up, the structure and composition of the bitumen binding agent go through complex transformations due to the processes of polymerization, polymerization of carbons, evaporation of volatile components, etc. These processes depend on the thickness of bitumen films on the surfaces of mineral particles, depending on the type and size of mineral particles, exposure to air, magnitude and intensity of the process, high temperatures and other factors. Since bitunomineral mixtures contain mineral particles that can vary in size hundreds of times, films of different thickness and directivity are formed on their surfaces in the process of mixing with bitumen. This raises the need for a differential study of their behavior at high temperatures and changes in their adhesive properties in particular. At this, due to the lack of a standard methodology for analysis of these processes, a special estimating experimental method has been developed (see the Patent of the Russian Federation for the invention No. 2654954 [22]). The aging of the bitumen binding agent on the surfaces of mineral materials was analysed using a dimensionless aging factor for local indicators of physical and mechanical properties. According to the research based on this method, the most sensitive indicator is the compressive strenght limit at 50 degrees Celsius for standard cylindrical samples, formed from bituminous mixtures pre-heated at high temperatures. The aging of crushed granite mixtures of fr. 5…10 mm with petroleum road bitumen 90/130 was calculated at various ratios – 1:25; 1:30; 1:35; 1:40, pre-aged at + 150 °C. The aging dynamics was assesed by the values of aging intensity according to the aging coefficient. Due to the experiments, the optimum ratio of bitumen and mineral part (crushed granite) with the best resistance to aging at high temperatures and the dynamics of changing the aging intensity at different time intervals was determined. The results also include mathematical models describing the aging of mixtures under study, analysis of the experimental results and conclusions.
Development of road transport infrastructure in the regions of the Russian Federation using digital technologies
Authors: Shpilkina T A , Zhidkova M A 
Published: June 2020

Abstract
The article studies the problems of road transport infrastructure in the regions of the Russian Federation on the basis of the use of digital technologies. The parameters of the national project “Safe and high-quality roads”; (BKAD) are analyzed and the prospects of its implementation by 2024 in the regions of Russia, in which the largest amount of road repair work is planned, are determined. Such regions are Nenets Autonomous Okrug, Kalmykia, Kirov and Kostroma regions, Altai Republic and Tomsk region. By 2024 roads in the Arkhangelsk and Saratov regions will be repaired least of all. Identified regions in which the repair of roads will not change during the period of 2017–2024 are Krasnoyarsk Krai, Voronezh oblast, Chukotka, etc. The data are presented Rosavtodor to equip highways and introduce intelligent transport systems using modern digital technology in 2021 and 2024; the program of measures on the national project BCAD is intended for 2019–2024. The implementation of the presented measures will contribute to the safety of road conditions, the system of assistance to victims of road accidents, and reduce negative emotional stress.
The complex method of estimation of highway maintenance quality taking into account the International Roughness Index
Authors: Zhustareva E V , Bochkarev V I 
Published: June 2020

Abstract
The work deals with improving the method of a complex estimation of highway maintenance quality. The methods of estimation of highway maintenance quality were analyzed. The most complete and reasonable estimation is reached using a complex method. This method takes into account the influence of different transport and operating characteristics on providing secured speed of cars. The car speed impacts on the efficiency of motor traffic. One of the indices influencing the car speed is a road roughness. Today, in the Russian Federation the road roughness is estimated using the International Roughness Index (IRI). But the complex method doesn’t take into account the state-of-art measuring means as well as the International Roughness Index (IRI). The theoretical and experimental studies were carried out to establish the dependence between the IRI index and a partial coefficient of providing the design speed of cars. The model to define the partial coefficient of providing a design speed based on the International Roughness Index (IRI) was offered. The table for calculation of the partial coefficient of providing a design speed was offered as well.
Set of organizational, technical and reconstructive measures aimed at improvement of section performance indicators based on the study of systemic relations and regularities of functioning of railway transport system
Authors: Olentsevich V A , Belogolov Yu I , Kramynina G N 
Published: June 2020

Abstract
The organization of operational work should correspond to the corporate interests of the railway transport system: increasing profitability, minimizing transportation costs, increasing the interest of structural units in improving financial and economic results, focusing on high-quality transport customer service. Measures to reduce costs do not give the expected effect, resulting in the decrease in the reliability of technical means and transportation quality, may entail additional costs for the restoration of technical means and lower profitability. A constant increase in cargo turnover necessitates an increase in the throughput capacity of railway lines and sections. One of the main transport enterprises in Eastern Siberia is the East Siberian Railway. At the Bolshoi Lug - Slyudyanka railway section, the maximum ascent and descent magnitude is 18 ‰, the minimum horizontal curve radii are less than 300 meters. In this regard, the traffic operation on the mountain pass section is organized by way of pushing trains. For the estimated year 2023, the target indicators of the comprehensive project of the polygon require the throughput capacity of the section under consideration to increase to 137 pairs of trains per day. The article analyzes the factors affecting the magnitude of the section performance indicators and identifies the “bottlenecks”. It proposes the complex of organizational, technical and reconstruction activities. The value of one-time and current costs is determined. The economic effect of changing the performance indicators of structural units due to an increase in the volume of work, as well as the payback period of each event, are calculated.
Evaluation of heuristic procedures formation results to select and justify composition of defectiveness parameters of road pavement affecting reliability indicators
Authors: Bazhanov A P 
Published: June 2020

Abstract
The research presents effective solution to the problem of evaluation of Heuristic procedures formation results, obtained by the Delphi approach, during the selection and justification of the composition of defectiveness determining parameters of road pavement that affect the indicators of their reliability. The article presents the parameters of the defects of road surfaces of the Penza agglomeration, obtained by diagnostics in order to identify the most important of these parameters in the questionnaire of experts and a single matrix of expert assessments. The author developed the algorithm processing the results of the selection of a subgroup of experts with a close opinion, including the need to conduct expert evaluation of the rank type. According to the variance analysis (presented by the author), a statistical assessment of the significance of differences in the distribution of defectiveness parameters of road pavements affecting some generalized indicator of their reliability, the structure of their influence is determined, while the parameters of the distribution of differences of significant and insignificant differences are assigned to different groups by their degree of influence. The structure of their influence is determined, at the same time parameters that have essential and non-essential difference in the distributions according to the degree of their influence are assigned to different groups. This approach allowed leveling the significance of differences in the assessment of the distribution of defectiveness parameters of road pavements that affect some generalized indicator of their reliability, with the assessment of differences in the average values of the ranks. The comparison of the evaluation of parameters that have an insignificant difference in the average values of ranks assigned to one group, with an estimate for the parameters for the average degree of influence attributed to another group, showing their practical unambiguity. The final structure of groups of defectiveness parameters of road pavements is established, taking into account the priority of their influence on the generalized indicator of reliability of these roads. This heuristic analysis made allowed identifying the most essential parameters affecting the quality of road pavements and their reliability.
Modeling of the management strategy of the research process on the basis of a digital model
Authors: Borovik V S , Borovik A V 
Published: June 2020

Abstract
An important problem of efficiency growth of scientific and technological development by means of a centralized management of the research process is analyzed. The digital modeling of scientific problem solution was studied as an efficient tool of a precise, targeted management of the scientific search. It was shown that one of the priority goals of digitalization consists in a significantly exact and operational numerous calculation of forecasted results under the conditions of innovative development on the basis of use of factors which in reality reflect the conditions and means of system functioning. The theoretical justification of the strategy of a scientific problem modeling is provided. On the basis of the analysis of retrospective information of results of previous research with the help of a multi factor correlation and regressive analysis the digital modeling was carried out which allows creating the management strategy of a scientific problem solution. An example of optimization of the scientific search management strategy based on matrix transformations is given.
Evaluation of the impact of anti-alcohol policy in the regions of the Russian Federation on road traffic accidents
Authors: Chubukov A B , Kapitanov V T , Silyanov V V , Monina O Yu 
Published: June 2020

Abstract
Based on the earlier works performed by the authors, in which the role of socio-economic factors in road traffic accidents was noted, an analysis was carried out, models were developed. On their basis the analysis is developed and models are carried out. Regression equations allow highlighting the main factors affecting the number of deaths in accidents caused by drunk drivers in the regions of the Russian Federation.