bluuebunny/crossref_metadata_2025 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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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.
The development of basic algorithms for processing navigation data in dispatching control systems of road transportation of goods and passengers
Authors: Filippova N A , Belyaev V M
Published: June 2020

The development of basic algorithms for processing navigational data in dispatching control systems of road transportation of goods and passengers on specified routes is discussed in this article. Algorithms for processing navigation data with the use of GIS-technologies are described. The features of the “linking” of navigation marks to the zones of control points represented in the spatial model of the route by polygons formed by means of specialized editors of geographic information systems are described. The algorithm of recognition of flights performed on a given route based on the analysis of the actual data on the passage of checkpoints of the route by the vehicle, as well as the algorithm of recognition of liberty mileage is considered in detail. The description of the algorithm for comparing the planned and actual indicators of transport work developed using the theory of sets is presented. A block diagram of an algorithm for a step-by-step evaluation of the results of performing transport work is presented on the basis of the application of the procedure of stepwise narrowing of the set of admissible alternatives.
The procedure of statistical evaluation of accident rate equation for roundabouts
Authors: Kloyan A N , Byrgonytdinov A M , Fedoseeva O A , Lyalkina G B , Yashmanova L V
Published: June 2020

Road Design Manuals propose the procedure for determining the accident rate at modern roundabouts by the probable number of major accident of types on specific sites of a roundabout per year. An assumption is made that the regression equation may not take into account the design features of modern roundabouts, climatic conditions, as well as driving style in the Russian Federation. The paper presents a step-by-step method of the regression equation validation to assess the accident rate at the approaches to the roundabouts on the basis of other statistical methods. The validation involves the statistical evaluation of the sample correlation coefficients between the accident equation and the factors affecting it. Within the work the values included in the equation were non-dimensionalized, necessary assumptions were introduced, and the features of performing correlation analysis in the particular case were analyzed. The procedure proposed enables to determine the reliability of the equation for determining the accident rate at the approaches to a modern roundabout in the conditions of the Russian Federation, taking into account climatic conditions, design features, the state of the existing road transport network, as well as driving style.
Methods of determining the correction coefficients of specific norms of spare parts consumption depending on fleet age
Authors: Maksimov V A , Zavgorodniy A A , Pozhivilov N V , Krylov G A
Published: June 2020

The article considers changes in requirements for spare parts for maintenance and ongoing repair of urban buses taking into account their mileage from the beginning of operation. The research was carried out with the purpose of development of a technique that would help one to determine coefficients of correction made to specific norms of consumption of spare parts for various age groups of buses on the basis of changes in their failure flow. Correction factors were calculated for the four selected age groups of buses. In addition, the article considers the issue of reducing the annual mileage of the public transit bus while increasing its service lifetime. The methodology was tested on taking LiAZ-529222 and LiAZ-621322 urban buses as an example, operated in Moscow. As a result of the performed calculations, values of coefficients of correcting the consumption of spare parts have been obtained for the considered modifications of buses in each age group.
Digital transformation infrastructure and transportation logistics systems
Authors: Nekrasov A G , Sinitsyna A S
Published: June 2020

The paper considers an integrated approach to the management of the life cycle of the transport and logistics infrastructure, basing on the concept of digital transformation and logistics engineering. The issues of digital transformation of the transport infrastructure are of particular importance in the context of the transition to the concept of Industry 4.0. This implies the existence of new infrastructure requirements, both in terms of costs and from a strategic approach to increasing business productivity, taking into account the sustainability criteria and response time to failure situations. As the basis of a highly efficient integrated TLS, there is a coordinated interaction of enterprises within the stages of the life cycle “design – operation – operational control – check and corrective actions – check of the control system”. New approaches have been recommended that provide highly efficient support for global transport systems, not only through the use of digital technologies, but also logistic engineering methods.
Software modeling application for verification of transportation planning engineering hypotheses
Authors: Shchegolova N , Talalai V , Gorshenina C , Smirnova D
Published: June 2020

The organization of traffic is a complex of engineering and organizational arrangements aimed at maximizing the use of traffic flows opportunities represented by the road geometric parameters and condition. The article deals with an example of using software modeling for creating a digital twin of a complex intersection in Saratov in order to verify the engineering hypotheses concerning the effective transportation planning. The current traffic situation in the PTV VISSIM program is simulated. The transportation planning engineering hypothesis proposed and simulated the solution options of changing the working traffic light duration at the intersection for verifying and widening the carriageway by adding a lane. The analysis of two models options allowed determining the most effective transportation planning measure in a given transport hub of the city with a high level of traffic delays, which is actually the duration change of the working traffic light at the intersection. The software modeling application is confirmed for creating a digital twin complex intersection in Saratov.
An overview road data collection, visualization, and analysis from the perspective of developing countries
Authors: Silyanov V V , Sodikov J I , Kiran R , Sadikov A I
Published: June 2020

Road data collection went through dramatic changes over the course of technology enhancement. It started with simple paper sketches of pavement distresses, then manual and automatic road data collection, current trends are mobile phone-based road data collection and in near future connected/autonomous vehicles based road data collection will dominate. The evolution of road data collection methods shows how technology is shaping the way how data is collected, stored and analyzed. Even though the technology is rapidly progressing, most of the developing countries are still practicing manual (visual) road data collection practices. The paper overviews the advantages and disadvantages each approach describes data quantity requirements proposes an approach for road asset management systems in developing countries. It also highlights how to visualize road data by utilization open-source GIS software and briefly overviews turnkey solutions for road asset management.
Research on the integration of intelligent transport systems
Authors: Subbotin B S , Ahmetzhanova E U
Published: June 2020

In article top trends and the directions of application of the intellectual transport systems (ITS) are considered and analyzed. Now, proceeding from the analysis of world practice, it is possible to draw a conclusion that application of the intellectual transport systems as systems which provide adaptive and expected management of safety and the traffic organization in the transport and road system of regions will lead to the growth of transport services quality level. Development of the intellectual transport systems methodologically is based on system approach as the intellectual transport systems are formed as systems, but not separate services. Methods of creation of the intellectual transport systems are based on the principles of operating transport systems modernization and reengineering.
Digital object-oriented control models in automobile-road complex systems
Authors: Terentyev A V , Karelina M Yu , Cherepnina T Yu , Linnik D A , Demin V A
Published: June 2020

The extensive development of the structures of the automobile-road complex requires optimization of the processes of their integration into the regional and global transport infrastructure. In order to effectively manage unstable traffic flows, automated control systems are developed that use complex algorithms based on the principles of artificial intelligence. The basis of this approach is the concept of transferring the concept of a control object from a generalized or aggregate traffic stream to a separate control element: a separate vehicle, a separate passenger, a separate consignment. The completed management process in the system of the road complex, which meets the current level of development of scientific and technological progress and productive forces, requires the use of digital object-oriented management models based on the creation of a unified communication and computer network for managing information flows as well as the development and application of control models physical objects of movement in the transport network, determining the optimal trajectory of movement of the latter. To form a control system based on object-oriented models, it is necessary to develop specialized analytical methods for multi-criteria evaluation of possible options. It is of fundamental importance that the developed methods can investigate the field of probabilities of changes in informational situations of the environment and are applicable to factors of any degree of uncertainty.
Method for determining integral damage from road accident
Authors: Zhivoglyadova L V , Zhivoglyadov V G , Silyanov V V
Published: June 2020

In practice, the inspection of the scene of an accident, the conclusions, the collection of materials and execution are carried out, as a rule, by measuring electronic roulette, filming and visual methods without instrumentation, which does not allow to obtain the true (direct and indirect) causes that caused the accident, dimensions failures in the organization and management of traffic, both on the streets of its occurrence, and on the streets parallel to it, and the consequences of an accident, both on the transport involved in the incident and on other vehicles transport vehicles and their passengers affected by this incident. This article presents a method for determining the integral damage from a road accident taking into account the participating vehicles, drivers and passengers, as well as thousands of traffic participants (vehicles and passengers) who suffered damage due to a failure in the organization and management of traffic (factors, mileage), as well as road conditions that do not meet the requirements of traffic safety.
Improving the educational process to address issues of digital technologies development in the road industry
Authors: Merentsova G S
Published: June 2020

The features of the educational process in training personnel for the road industry at Altai State Technical University are considered, taking into account the development of the digital economy. Much attention has been paid to key technologies that provide digitalization for the road industry. The set of disciplines necessary for obtaining knowledge in digital technologies for the further activities of university graduates is analyzed. When studying bachelor’s and master’s programmes, future specialists acquire knowledge of modern methods in computer-aided design of highways, geographic information systems in construction, information modeling and intelligent transportation systems. During the educational process, an understanding of the importance of implementing an automated control of equipment in road construction works using onboard information management system is also formed. The directions of scientific research are described in which students studying Master’s Programme in Highway Design Construction and Management work. These studies make extensive use of digital technology. The analysis of road traffic accidents for identifying hazardous sections is given, as well as the analysis of the current road state with the development of measures for improving the transport and operational road condition. Current research areas using digital technologies are in demand in modern conditions.
Contemporary paradigm of cargo motor transport vehicles service
Authors: Ozornin S
Published: June 2020

The results of the study of the organization of cargo vehicles operation by the transport processes mechanization in the environment, complicated by the climatic and industrial factors, are presented. The integrated technological process of using freight vehicles as a new modern paradigm of their operation during the life cycle is described.
New digital technologies of training in the transport education
Authors: Smyk A F , Tkacheva T M , Portnov Yu A
Published: June 2020

The article analyzes the use of new digital technologies in transport education considering the Moscow Automobile and Road Construction State Technical University (MADI) as an example. The results Massive Open Online Courses (MOOC) and other electronic systems in the training of engineers using on specialty «Land transport and Technological Vehicles» are given. Positive opportunities of online courses using arise in the organization of student extracurricular activities and the implementation of a differentiated approach in training. Different content of online courses in the areas of training makes it difficult to use MOOC in the practice of general engineering education. The authors suggest using the Modular Object-Oriented Dynamic Learning Environment (Moodle) which is a free web application that provides to create websites for online learning. The experience of using the online resource «Information system MADI» («IS-MADI: Physics») to study Physics, created by MADI’s teachers, is also considered. This experience makes to conclude that using of the Internet resource «IS-MADI: Physics» awakes interest of students to learn Physics. In a whole students begin to understand that knowledge of Natural Science disciplines gives them powerful tool to create and to exploit modern cars and roads, they begin understand importance of Physics.
Methodological approach to digitalization of management processes in automobile and road complex
Authors: Terentyev A V , Karelina M Yu , Pavlovskaya A A , Arifullin I V , Karelina E A
Published: June 2020

In order to successfully accomplish the tasks of digitalizing control processes in the road complex integrated into a focused process, new generations of control systems — intelligent control systems – are being actively developed today. Intelligent control systems should be able to independently develop a goal, implement the decision-making process for an action, provide the necessary set of functions to achieve a goal, predict the values of system indicators as a result of actions and compare them with real data, providing feedback in the system and adjusting the control procedure. Currently, the methodological basis for making management decisions in control systems is the concept of scenarios based on the theory of expert assessments. The main disadvantage of this approach is the inability of the system to gradually adapt to changes in input information without completely reworking the structure of the initial requirements. For effective implementation of this task, it is necessary to develop a decision-making methodology in control systems based on formal logical methods of decision theory, namely, analytical methods for obtaining many effective plans, which should allow us to build algorithms that provide optimal solutions when implementing applied management tasks while having minimal information about the conditions of the research object.
Methodology for making management decisions in digital economy systems
Authors: Zaitsev D V , Evtyukov S S , Karelina E A , Voropaev V V , Kholodova A O
Published: June 2020

For effectiveness assess of management decisions in modern economic systems, as a rule, single-criterion mathematical models are used, which have several disadvantages. The use of qualitative single economic efficiency criterion for complex production processes comparative evaluation in digital economy leads to a high proportion of subjectivity. Modern complex production, based on intelligent communication technologies, operates in specific information situations context that require the use of adequate mathematical tools for making effective management decisions. In such tasks, effective solution choice depends on external and internal environment state of the system being studied and implies the use a number of methods for solving multi-objective tasks. The main methods used in uncertainty situation cases due to information situation complexity are prior ranking or expert evaluation methods. Naturally, methods based on expert evaluation have significant degree of subjectivity. This disadvantage can be avoided if you solve the problem using scientifically based effectiveness evaluating methods of production processes not by one but by several relevant performance indicators.
Actual proposals for improving the transport and road network of the Kyrgyz Republic
Authors: Glazunov D
Published: June 2020

The main problems of improving the operation of road transport in the Kyrgyz Republic are considered, the problems of the road network affecting road safety. The intensity of traffic and the environmental safety of the cities of our country are noted not only as a result of the impact of compliance with measures to ensure road safety, but also reconstruction of highways. Measures have been developed to solve these problems.
Influence of rolling condition and geometry of tire tread on its wear intensity
Authors: Karelina M Yu , Balabina T A , Filatov V V , Mamaev A N , Vorontsov A S
Published: June 2020

Wheel tire wear annually takes hundreds of thousands of rubber tons. In this regard, the issue of reducing this negative phenomenon is urgent, for which it is necessary to know what and how affects tire wear. Factors affecting the wear of elastic wheels can be different: recipe of the rubber compound, the amount of traction (or braking) force in contact with the road, the type of movement is straight or cornering, the installation angles of the wheels (camber and toe-in angles), tire design, driving mode - uniform or with acceleration (braking). In this paper, we consider the influence on tire wear of such parameters as the value of the longitudinal force acting in the contact, the camber and toe-in angles, the radius of the motion trajectory and such a structural parameter as the convexity of the tread. When assessing the wear intensity, as is accepted by most researchers, we proceed from the fact that wear is proportional to the friction power in the contact of two interacting bodies.
Features of calculation and design of pavement enduring prolonged static load
Authors: Korochkin A V
Published: June 2020

The main calculation in the design of pavement is the calculation of the dynamic load. Calculation of static load is recommended in some cases specified in regulatory documents. It is necessary to prove that the calculation of the static load is required for any calculations of pavement. Using the calculation of pavement as an example, it is proved that a design that can withstand dynamic load does not always withstand static load. For the first time, a recommendation is given on the need to calculate the static load for any calculation of pavement, and not only in the cases indicated in the regulatory documents. It is proved that calculations for static load must be performed for any calculations of pavement. It is noted that different regulatory documents give different parameters for the calculation; therefore, before the start of the calculation, it is recommended to decide on which regulatory documents the calculation will be made.
The use of reusable fuel injection with the aim of improving the economic and environmental performance of the diesel engine
Authors: Savastenko E A , Savastenko A A , Gorbachevskiy E V , Markov V A
Published: June 2020

The current trend in the development of motor-and-tractor diesel engines imposes tough requirements on fuel equipment and the fuel supply process. The implementation of it is difficult to combine with the requirements of reducing heat generation at the initial stage of combustion and the rate of pressure increment to reduce exhaust emissions and engine noise. A decrease in the duration of the injection process and an increase in the volumetric feed rate lead to a growth in the cycle dynamism factor and an increase in the operation noise. This scientific article discusses the use of multiple injection of fuel in a diesel engine to reduce the emission of nitrogen oxides, smoke and particulate matter by improving the heat transfer processes, the mixture formation and, as a result, heat generation. Low exhaust gases toxicity and smokiness values are achieved.
The reduced wear of wheel pair flanges of freight cars
Authors: Gozbenko V E , Tuvshintur B , Kargapoltsev S K
Published: June 2020

Reduced wear of rails and wheels of rolling stock is a very important task of railway transport. Solving this problem not only in-creases the lifespan of wheels and rails, but often leads to a positive reduction of fuel consumption for train traction, reduces noise when the train moves in curves. The intensity of wear of rails and wheels of rolling stock depends on many factors. The practice of Ulan Bator railway shows that since 1992, the flange of the wheels has started to wear out intensively, thereby increasing operating costs to repair and reducing service life of the railcar wheel pairs. In order to determine comprehensive measures for the rotation of wheel pairs as well as to determine the intensity of wear of the flange thickness of railcar wheel pairs, experiments have been con-ducted on the wear and turning of wheel pairs of freight cars. To substantiate comprehensive measures for the rotation of wheel pairs and determine the intensity of wear of the flange thickness of the railcar wheel pairs, experimental tests on a freight car after the overhaul with the 33-mm flange thickness have been carried out throughout the year.
Statistical study of the wear of wheel pair flanges of freight cars
Authors: Gozbenko V E , Tuvshintur B , Kargapoltsev S K
Published: June 2020

Reduced wear of rails and wheels of rolling stock is a very important task of railway transport. The flange profile studies were conducted to determine the machining sizes for the flange of railcar wheel pairs. The studies made it possible to determine that the rejection criterion characterizing dangerous form of the flange wear is a horizontal projection forming the worn-out surface of the flange between the points located at about 2 mm below its top and 13 mm above the average taping line. There are calculations made on the wear of the wheel pairs of gondola cars of the EC70 model manufactured in China after three years of operation.
The use of intelligent systems when regulating road traffic
Authors: Agureev I E , Andreev K P , Ionov E V , Svistunova A Ya , Terentyev V V
Published: June 2020

Statistics show that approximately half of all fatal accidents occur at unregulated and inadequately lit pedestrian crossings. To minimize the severity of the consequences, it is necessary to develop a set of organizational and technical measures to inform traffic participants about a safe pedestrian crossing. One of the ways to solve this problem may be to introduce the development of leading design organizations aimed at the use of intelligent technical systems to ensure the process of safe crossing of highways by pedestrians, i.e. smart pedestrian crossing. The article discusses the possibility of introducing an intelligent system into the traffic control process in sections of the road network with heavy traffic of cars and pedestrians. The operating principle of this system is based on the recognition of moving vehicles and timely warning pedestrians, as well as determining the location of pedestrians at the crossing and warning drivers about people on the road.