Transport engineering最新文献

{"title":"DETERMINATION OF THE RELIABILITY INDICATOR ACCORDING TO THE TECHNICAL CONDITION OF THE ELEMENTS OF CONTACT PAIRS","authors":"Igor' Romanov","doi":"10.30987/2782-5957-2024-6-11-18","DOIUrl":"https://doi.org/10.30987/2782-5957-2024-6-11-18","url":null,"abstract":"The assessment of the effectiveness and economic feasibility of using technical products over time is their reliability, which is predicted at the design stage. The technical task of predicting the required level of reliability should be considered from the perspective of the functional state of certain elements and their mating under specified operating conditions. The external conditions and the response of the elements to them determine the characteristics of changes in the parameters of the technical condition, which should be chosen from the point of view of analyzing the physics of the processes leading to failure. \u0000In most cases, contact pairs, including sliding friction pairs with periodic impacts, are subject to wear during operation, therefore, one of the parameters of their working condition is their geometric dimensions, which decrease in time determines the rate of the parameter change from its initial to the limiting value. The construction of this functional dependence allows determining the average value of the parameter at any time, control the achievement of its pre-failure value and, as a result, predict failure. \u0000The construction of the curve of change rate of the parameter determining the workable state of the contact pair in accordance with the approaches presented in the paper is only the first stage of reliability predicting. No less difficult is the stage of choosing a material that provides a given level of reliability.","PeriodicalId":510317,"journal":{"name":"Transport engineering","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141335976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"IMPACT OF THE PERSONNEL RESERVE ON THE ORGANIZATION OF TRANSPORT PRODUCTION","authors":"Anna Pismennaya, Olga Sharafetdinova","doi":"10.30987/2782-5957-2024-6-41-49","DOIUrl":"https://doi.org/10.30987/2782-5957-2024-6-41-49","url":null,"abstract":"Based on theoretical ideas about the organizational effectiveness of hierarchical structures and methods of increasing efficiency, the paper describes the change in approaches to the formation of the personnel reserve and its impact on the organization of production in the State Unitary Enterprise \"Moscow Metro\". The paper considers the change in the organizational and staff structure of those responsible for the formation and development of the personnel reserve, as well as the effect obtained in terms of the replacement of vacant positions.","PeriodicalId":510317,"journal":{"name":"Transport engineering","volume":"19 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141336671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"INFLUENCE OF THE MILLING MODE OF STEEL 45 WORKPIECE ON THE ROUGHNESS RANGE OF THE RESULTING SURFACE","authors":"A. Kisel’, Tural Mamedkuliev Tural Sohrab ogly, Aleksandr Romanovskiy","doi":"10.30987/2782-5957-2024-6-4-10","DOIUrl":"https://doi.org/10.30987/2782-5957-2024-6-4-10","url":null,"abstract":"The study objective is to predict the range of surface roughness obtained when milling a 45 steel workpiece on CFPE-250 machine. To achieve this objective, it is necessary to solve the following task: to assess experimentally the roughness of the resulting surface when milling a workpiece made of 45 steel on CFPE-250 machine and to identify the mathematical dependence of the roughness range on the treatment mode for this machine. Based on the theory of experiment planning, the mathematical dependence of the roughness range on the cutting speed, feed and cutting depth is found out. The dependence found allows calculating the roughness range and changing the parameters of the cutting mode. The probability of the measured roughness values belonging to the calculated ranges Ra ± ΔRa, micron is 75%. The novelty of the conducted study is in calculating the range of roughness described by the system of equations. This system of equations will be valid for the used CFPE-250 machine tools, the material to be machined (steel 45) and the tool material (hard alloy), subject to the ranges of cutting modes (cutting depth t=0.25...1 mm, feed S=50...200 mm/min and cutting speed V=15.7...62.8 m/min). Similarly, it is possible to find out a system of equations describing the range of roughness obtained for other machine tools (the more rigid the technological system is, the narrower the roughness range will be).","PeriodicalId":510317,"journal":{"name":"Transport engineering","volume":"92 19","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141337445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"STRUCTURAL SYNTHESIS OF EIGHT-BAR CLOSED KINEMATIC CHAINS OF THE FOURTH SUBFAMILY MOVING LINKS OF THE FIRST FAMILY","authors":"V. Vovkotrub","doi":"10.30987/2782-5957-2024-6-31-40","DOIUrl":"https://doi.org/10.30987/2782-5957-2024-6-31-40","url":null,"abstract":"The study objective is to develop a method for the structural synthesis of closed kinematic chains of moving links onto the fourth subfamily of the first family. \u0000The tasks are the following: based on the universal structural system of closed kinematic chains of the first family movable links to determine the composition of solutions describing the arrangement of closed kinematic chains of the fourth subfamily movable links of the first family with the complexity of the basic chain link equal to four, chain mobility equal to six and the total number of chain links equal to eight. To identify virtual chain links and obtain combinations of kinematic pairs and links that are the basis for constructing structural schemes of eight-bar closed kinematic chains of the fourth subfamily moving links of the first family, with the complexity of the basic chain link equal to four. Using the obtained data, to consider constructing structural schemes of eight-bar closed kinematic chains of moving links of the first family on a specific example. \u0000Research methods are the method of structural synthesis of closed kinematic chains of moving links of the first family, set theory and combinatorics, virtualization, identification and coding, graph theory. \u0000The novelty of the work: the features of applying a universal structural system for determining the composition of eight-bar closed kinematic chains of the fourth subfamily moving links of the first family are given. Using a specific example, constructing structural schemes, eight-bar closed kinematic chains of the fourth subfamily moving links of the first family is considered. \u0000The study results: combinations of kinematic pairs and links are found, which make it possible to construct all possible structural schemes of eight-bar closed kinematic chains of the fourth subfamily moving links of the first family under given parameters. A diagram of an eight-bar closed kinematic chain of the fourth subfamily movable links of the first is obtained, from which single-movable eight-bar mechanisms of the first family can be formed by stopping one of the links. A diagram of one of these mechanisms is shown: a screw and lever mechanism of the first family.","PeriodicalId":510317,"journal":{"name":"Transport engineering","volume":"6 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141336699","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"DEVELOPMENT OF A COMPOSITE MATERIAL, AS AN ALTERNATIVE TO CLASSICAL MAGNALIA ALLOYS HAVING INCREASED STRENGTH AND DUCTILITY PROPERTIES","authors":"M. Gus’kov, A. Horin, Viktor Batrashov, Dmitriy Kryukov, A. Krivenkov, Anton Vavilov","doi":"10.30987/2782-5957-2024-6-61-68","DOIUrl":"https://doi.org/10.30987/2782-5957-2024-6-61-68","url":null,"abstract":"The main study objective is to make a composite material based on an aluminum alloy with increased strength and plastic properties compared to aluminum alloys traditionally used in mechanical engineering. The tasks to which the paper is devoted are to develop a technology for making a specified composite material and to study its basic mechanical properties. Comparative analysis at the stage of determining the relevance of the work, mathematical calculation of explosion welding parameters to obtain a composite and testing on a tensile machine in order to obtain values of strength and plastic parameters are used as research methods. The novelty of the work is in the application of technological operations that give the material a set of properties that it did not possess in its original state. The study results show that this area is in demand both in Russia and abroad; new improved aluminum alloys are made; the most relevant way to improve properties is to make a composite material. A composite is obtained, which has a 40% higher tensile strength and 3% higher elongation compared to the starting material. When compared with the traditionally used AMg5M alloy, the developed composite has an advantage of 35% in strength parameters and 70% in plasticity. Also, this material has an advantage in strength and ductility over 1565h MU alloy.","PeriodicalId":510317,"journal":{"name":"Transport engineering","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141337071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"EXTERNAL CONTROL MATHEMATICAL MODEL IN THE CONDITIONS OF SERIAL REPAIR OF GAS TURBINE ENGINES","authors":"Dmitriy Lyubchenko","doi":"10.30987/2782-5957-2024-6-19-30","DOIUrl":"https://doi.org/10.30987/2782-5957-2024-6-19-30","url":null,"abstract":"The study objective is to find the possibility and expediency to introduce the method of control mathematical model into scientific research. \u0000The task to which the paper is devoted is to analyze the results of using a control model, with the help of which the reliability of calculations using mathematical models specially designed for a concrete scientific study is verified. \u0000The paper briefly reveals the essence of mathematical models developed and applied in scientific research using external, industry-specific regulatory and administrative documentation, as close as possible to the purpose of a mathematical model acting as a control, recheck according to one of the output parameters. \u0000The design and technological solutions presented in the study to improve the operational efficiency of gas turbine engines during factory repairs are confirmed by mathematical models, the development of which is required due to the lack of their analogues in scientific and technical information sources. \u0000The novelty of the research work is in the proposed methods for improving the efficiency of operation and repair of gas turbine engines, as well as in the application of the method of control mathematical model presented in the industry regulatory and administrative documentation. Taking into account the use of the developed mathematical models in the study, such a control model acts as an external check model of calculations. \u0000This article presents the results of positive application of the control mathematical model. \u0000Conclusions. In cases of developing new and previously unused computational and other mathematical models for a specific study, it is possible and advisable to use the method of a control mathematical model (models), which in such cases will act as an external one, borrowed from reliable information sources. The method of the control mathematical model can be applied in other studies if it is necessary to control the results of intermediate or final calculations when it is impossible to recheck them practically in the studied technical and other systems.","PeriodicalId":510317,"journal":{"name":"Transport engineering","volume":"5 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141336764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"DESIGN FOUNDATION OF A COVERED FREIGHT CAR WITH AN INCREASED LOADING SPACE","authors":"D. Antipin, S. Ashurkova, Denis Bondarenko, Marina Manueva","doi":"10.30987/2782-5957-2024-6-50-60","DOIUrl":"https://doi.org/10.30987/2782-5957-2024-6-50-60","url":null,"abstract":"The market of covered freight cars, as well as existing designs of this car type of domestic and foreign production is analyzed. Promising trends of making innovative designs of freight cars for the transportation of piece and container goods are found out. The original design of a covered freight car with an increased body space due to the use of the space between trucks is proposed. To reduce the complexity of loading and unloading operations, sliding sections of the side walls and roof are provided in the car design. To confirm the compliance of the proposed design with the requirements of regulatory and technical documents, the car was entered into the dimension, checking for automatic coupling at the junction of a straight line and a curve, passage in the coupling of an s-shaped curve and coupling of a straight line and a curve, and a single car along a circular curve of a small radius, as well as passing without self-decoupling of the hump of the sorting slide, the ramp exit of the train ferry. A safety assessment is carried out with regard to rolling the wheel onto the rail and overturning the car in curves. The car dynamic characteristics are found out by mathematical modeling methods. The assessment of the strength of the body load-bearing structure, lifting mechanisms of the floor sections, sliding sections of the roof and side walls is performed using the finite element method implemented in the environment of a specialized software package. The results obtained as a result of calculations and computer modeling confirmed the operability and safety of the proposed design of a covered freight car with an increased loading space.","PeriodicalId":510317,"journal":{"name":"Transport engineering","volume":"4 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141336283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"MACHINING THE ENDS OF PART WORKPIECES","authors":"Bori Mokrickiy, Vladimir Grigoriev, Aleksandr Skripilyov, Sergey Maryin","doi":"10.30987/2782-5957-2024-5-4-9","DOIUrl":"https://doi.org/10.30987/2782-5957-2024-5-4-9","url":null,"abstract":"The study objective is to increase turn process efficiency of corrosion-resistant stainless hard-to-machine steel 12X18H10T. \u0000The task is to reduce tool costs. \u0000Research methods are the following: full-field testing and simulation in deform software environment. \u0000The novelty of the work: a new approach is formed to increase the durability of a metal-cutting tool for turning the ends of workpieces. This made it possible to find out the most rational coatings for different operating conditions. \u0000Research results: recommendations are developed to choose a rational coating for hard alloy of VK8 grade.","PeriodicalId":510317,"journal":{"name":"Transport engineering","volume":"115 33","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140986301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SYNTHESIS OF AN ELECTRIC COMPRESSOR DRIVE OF AN ELECTRIC LOCOMOTIVE","authors":"D. Olkhovatov, Nikolay Grebennikov, A. Shevkunova","doi":"10.30987/2782-5957-2024-5-40-49","DOIUrl":"https://doi.org/10.30987/2782-5957-2024-5-40-49","url":null,"abstract":"The study objective is to improve the reliability and energy efficiency of the electric locomotive compressor drive. To achieve this, the required power of the electric motor was calculated the performance of the compressor unit, the volume of the main tanks and the selected electric motor were checked to start and adjust the capacity at low supply voltage. \u0000The task to which the paper is devoted is to design an electric drive for a compressor motor. A vector model of an asynchronous motor was made. The process of direct start-up and starting an asynchronous electric motor with the use of a scalar control system and IR compensation were modeled. \u0000Research methods: systematic approach; provisions of the theory of automatic control and electrical engineering; numerical PC simulation using Matlab software package. \u0000The novelty of the work is in the use of a frequency-controlled electric drive to start the asynchronous electric motor of the compressor unit instead of the normally installed starting capacitors. This design solution will significantly reduce the amplitude of the starting currents, which in turn will reduce the wear of the winding insulation. \u0000The study results are presented, based on the results of the constructed models, as graphs of the dependencies of speed and current during direct start of the electric motor and with the control system. \u0000Conclusions: the scalar control system, thanks to the introduction of an intensity setter, as well as IR compensation diagram, allow extending the transition time and controlling the value of the inrush current in acceptable values. Such an approach to make an electric drive compressor motor is able to significantly increase its reliability and service life, as well as to increase the overall energy efficiency of the system.","PeriodicalId":510317,"journal":{"name":"Transport engineering","volume":"112 19","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140986857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"PROBLEMS AND METHODS TO IMPROVE AUTOMATIC COUPLING DEVICE OF FREIGHT CARS, TAKING INTO ACCOUNT THE PECULIARITIES OF THEIR OPERATION","authors":"Viktor Filippov, Ivan Sergeyev, Aleksandr Pishchik, Nadezhda Kurzina","doi":"10.30987/2782-5957-2024-5-56-61","DOIUrl":"https://doi.org/10.30987/2782-5957-2024-5-56-61","url":null,"abstract":"The problems to operate the automatic coupling device are considered, taking into account significant changes in the operating conditions of freight cars. The operation experience of freight car automatic coupling devices of domestic railways and the United States of America is analyzed; common problematic issues are identified. Approaches to the study of modes of longitudinal-dynamic impact of cars are defined, a simplified model is given. There is a need to change the design of the automatic coupling device of freight cars by using two sequentially arranged blocks with working elements, as well as improving the properties of the working material of absorbing devices, especially in operating conditions over a wide temperature range.","PeriodicalId":510317,"journal":{"name":"Transport engineering","volume":"110 17","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140986890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}