Herald of the Ural State University of Railway Transport最新文献_第8页

Influence of contact network voltage fluctuations on current transients in the electric locomotive power circuit 接触网电压波动对电力机车电源电路电流瞬态的影响

Herald of the Ural State University of Railway Transport Pub Date : 1900-01-01 DOI: 10.20291/2079-0392-2022-2-32-40

A. I. Kuznetsov

{"title":"Influence of contact network voltage fluctuations on current transients in the electric locomotive power circuit","authors":"A. I. Kuznetsov","doi":"10.20291/2079-0392-2022-2-32-40","DOIUrl":"https://doi.org/10.20291/2079-0392-2022-2-32-40","url":null,"abstract":"The statistics of electric arc transfers along the collector of traction electric motors of the 2ES6 electric locomotive for 2020 are given. It is noted that half of the failures are associated with a potential spark on the collector, which indicates increased armature currents in the electric locomotive power circuit. The given voltage curve of the contact network also indicates that the power circuit is subject to constant current fluctuations. In the model of the power circuit of the 2ES6 electric locomotive, the mechanical component of the drive has been modified. It takes into account the resistance to train movement on one of the difficult sections of the Sverdlovsk Sabik - Sarga railway, as well as the inertia of the rotating parts of the 2ES6 electric locomotive and four-axle freight gondolas. The effect of voltage fluctuations in the contact network on current transients at different values of the maximum excitation voltage has been modelled. It is established that with the increase in the excitation voltage, the amplitudes of the armature current and the excitation current decrease, the duration of exceeding the currents of their limit value decreases. With voltage fluctuations up to 200 V, the armature current and the excitation current in the power circuit of the 2ES6 electric locomotive are in the range of their limit values with the increased value of the maximum excitation voltage of 120 V. With voltage fluctuations of more than 200 V, it is advisable to use low pass input filters.","PeriodicalId":118708,"journal":{"name":"Herald of the Ural State University of Railway Transport","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123822516","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}

引用次数: 0

Reliability analysis of ЭС2Г series compressor train units at the beginning of operation ЭС2Г系列压缩机组运行初期可靠性分析

Herald of the Ural State University of Railway Transport Pub Date : 1900-01-01 DOI: 10.20291/2079-0392-2020-1-24-29

A. Vorob’ev, S.O. Zyazev

引用次数: 0

Formation and maintenance of professional expectations of transport university graduates in the learning process 交通运输大学毕业生在学习过程中职业期望的形成与维持

Herald of the Ural State University of Railway Transport Pub Date : 1900-01-01 DOI: 10.20291/2079-0392-2019-3-79-88

T. Okuneva, O. Shestopalova

引用次数: 1

Modeling the choice and satisfaction of passengers on multimodal routes 多式联运路线上乘客选择与满意度的建模

Herald of the Ural State University of Railway Transport Pub Date : 1900-01-01 DOI: 10.20291/2079-0392-2022-3-4-14

S. Vikharev

{"title":"Modeling the choice and satisfaction of passengers on multimodal routes","authors":"S. Vikharev","doi":"10.20291/2079-0392-2022-3-4-14","DOIUrl":"https://doi.org/10.20291/2079-0392-2022-3-4-14","url":null,"abstract":"Passengers (especially in large cities) choose different modes of transport to travel along the same route. This is facilitated by the development of the road network (RN), the construction of transport hubs. There arises the problem of modeling the choice of routes and modes of transport for passengers to travel, taking into account transfers and changes of personal and public transport during trips. The solution of this problem is necessary for the purposes of designing route networks, plans for the development of the transport system and managing the load on the road infrastructure. A mathematical model of the choice of the mode of transport by passengers depending on the quality of the route, personal satisfaction and personal experience of the passenger, as well as the satisfaction of neighbors is proposed in [1-4]. However, this model considered only direct transportation from source point A to drain point B and could not take into account transportation by various modes of transport with transfers. This paper presents a new mathematical model that takes into account the multimodality of routes, as well as availability of several sources and drains, which will allow passengers to simulate the choice of modes of transport in individual districts or cities. The developed model makes it possible to simulate the choice and determine the level of passenger satisfaction on a new route network or assess the impact of changes on the existing one, since reinforcement learning methods are used instead of statistical analysis.","PeriodicalId":118708,"journal":{"name":"Herald of the Ural State University of Railway Transport","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121729861","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}

引用次数: 0

Features of rolling stock acceleration 铁道车辆加速的特点

Herald of the Ural State University of Railway Transport Pub Date : 1900-01-01 DOI: 10.20291/2079-0392-2020-1-75-81

Р. Я. Сулейманов, И. Б. Падерина

{"title":"Features of rolling stock acceleration","authors":"Р. Я. Сулейманов, И. Б. Падерина","doi":"10.20291/2079-0392-2020-1-75-81","DOIUrl":"https://doi.org/10.20291/2079-0392-2020-1-75-81","url":null,"abstract":"The article is devoted to the issue of acceleration of passenger electric stock. According to the traffic schedule, the trains are to have rapid acceleration and braking determined by the acceleration. In itself, great acceleration does not cause great inconvenience to passengers. But to provide comfort for passengers, limiting of acceleration build-up is required. At contact-rheostat control traction force is maintained by step change of starting rheostats resistance in accordance with the speed increase. This results in stepped changes of thrust force, respectively, to impulsive loads. At impulsive control of the traction drive there is a possibility of smooth increase of traction motors current value and, therefore, of the traction force. It was proposed to increase the armature current by the linear law with transition to a constant value at the end of the process. However, at the end of the process there is a traction force push similar to an ice slide. The most natural is to increase the thrust force according to the exponential law. For this purpose, an intensity set unit is introduced, which is to change the armature current according to the mentioned law at step-by-step change of the task from the driver controller in arbitrary sequence. In the control unit operating in analog mode, the exponential law is created when charging the condenser the voltage of which is determined by a differential equation and is supplied to the input of the armature current regulator. In the digital control form, a direct solution to the differential equation is impossible because of the constant change in the initial conditions under the action of the driver controller. Therefore, it is proposed to solve the equation by the digital Euler method, and to develop a special programming method.","PeriodicalId":118708,"journal":{"name":"Herald of the Ural State University of Railway Transport","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116930857","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}

引用次数: 0

Elaboration of the concept of a car with a hybrid power plant 阐述了混合动力汽车的概念

Herald of the Ural State University of Railway Transport Pub Date : 1900-01-01 DOI: 10.20291/2079-0392-2022-3-33-42

A. Markina, L. A. Pochuev

{"title":"Elaboration of the concept of a car with a hybrid power plant","authors":"A. Markina, L. A. Pochuev","doi":"10.20291/2079-0392-2022-3-33-42","DOIUrl":"https://doi.org/10.20291/2079-0392-2022-3-33-42","url":null,"abstract":"Residents of large cities suffer greatly from air pollutants, a significant proportion of which is accounted for the road transport. In order to solve this issue, car manufacturers are upgrading internal combustion engines, designing alternative engine units. This article analyzes various modern engine units, highlights their strengths and weaknesses. Statistical data demonstrating the growth of production and sales of electric and hybrid vehicles in Russia and abroad are presented. Cars equipped with traditional internal combustion engines (ICE) have unique advantages and today make more than 99 % of the global fleet. Based on the analysis, a scheme of a hybrid power plant (HPP) was formed, combining the components of engine units of electric vehicles and internal combustion engines. The main elements of installation and their layout in the car are described. A schematic diagram of transmission is presented, its components are listed and their operation is described. The HPP scheme was developed within the framework of the concept of a motor vehicle corresponding to the trends of modern automotive industry. At the same time, such cars provide the opportunity of sport driving experience, have good dynamic performance.","PeriodicalId":118708,"journal":{"name":"Herald of the Ural State University of Railway Transport","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114942161","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}

引用次数: 0

Quantitative analysis of 2ТЭ25А diesel locomotive power equipment reliability 2ТЭ25А内燃机车动力设备可靠性定量分析

Herald of the Ural State University of Railway Transport Pub Date : 1900-01-01 DOI: 10.20291/2079-0392-2019-4-76-82

D. M. Mayakov

引用次数: 0

Control of safekeeping of railway cars at points of technical transfer 技术转移点铁路车辆的安全管理

Herald of the Ural State University of Railway Transport Pub Date : 1900-01-01 DOI: 10.20291/2079-0392-2023-1-83-89

V. Lapshin, O. Cherepov, I. G. Sorogin

{"title":"Control of safekeeping of railway cars at points of technical transfer","authors":"V. Lapshin, O. Cherepov, I. G. Sorogin","doi":"10.20291/2079-0392-2023-1-83-89","DOIUrl":"https://doi.org/10.20291/2079-0392-2023-1-83-89","url":null,"abstract":"The article presents the analysis of damage of freight cars at transfer points for freight cars. The analysis of malfunctions of railcars stepping off the tracks of non-public use enabled us to determine that most of the railway cars have damages common for loading and unloading operations. It is possible to ensure the safety of railcars by applying, in particular, digital technologies, including when receiving freight cars from non-public railway tracks. It is noted that for the points of technical transfer of railcars (PTTW) as a subdivision of technical service points (TSP), the main form of internal primary accounting is the book VU-15 («Book of full-scale inspection of railway cars at technical transfer points»), the electronic format of which is only being introduced into the production process. The special significance of the transition to the electronic version of the VU-15 is manifested in enterprises with several PTTW, where railway cars transferred to the access railway through one point can be returned to the railway through other points. Often, the electronic form of the VU-15 greatly limits the capabilities of railcar inspectors when working on the tracks (operational search for data on railcar malfunctions, the possibility of photo and video recording of damage, the use of regulatory and reference information). The solution to these issues can be the use of mobile workstations (MWS) with additional functions for monitoring the safety of railway cars, which allow monitoring the technical condition of the freight cars before they are delivered to the non-public track and returning them to the infrastructure. Within the framework of the conceptual project, the AWS MWS PTTW structure for monitoring the technical condition of freight cars and the algorithm for processing information in the MWS PTTW for monitoring the safety of railway cars with the practical implementation of software in C# were developed.","PeriodicalId":118708,"journal":{"name":"Herald of the Ural State University of Railway Transport","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128918197","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}

引用次数: 0

On the relationship of natural oscillation frequencies and critical loads in assessing the rigidity of load-bearing elements of carriage structures 车架结构承载单元刚度评估中固有振动频率与临界载荷的关系

Herald of the Ural State University of Railway Transport Pub Date : 1900-01-01 DOI: 10.20291/2079-0392-2022-1-17-23

P. Grigor’ev

{"title":"On the relationship of natural oscillation frequencies and critical loads in assessing the rigidity of load-bearing elements of carriage structures","authors":"P. Grigor’ev","doi":"10.20291/2079-0392-2022-1-17-23","DOIUrl":"https://doi.org/10.20291/2079-0392-2022-1-17-23","url":null,"abstract":"The regulatory and technical documentation clearly defines the requirements for assessing the bearing capacity of rolling stock units, for example, to check the design being developed for loss of stability under the influence of compressive loads. This involves performing verification by calculation methods. The article considers the possibility of determining the critical level of external overpressure on the shell of the tank cauldron on the basis of experimental data on the minimum frequency and shape of natural oscillations. In order to solve this problem, the differential equation of flat cylindrical shells is used. The equation used was proposed by Donnell and has proven itself well in calculation of cylindrical shells, in particular cauldrons of tank cars. The peculiarity of the proposed solution lies in a certain analogy of the mathematical description of the processes of loss of stability and natural oscillations. As a result of transformations of the differential equations under consideration, an expression is obtained that connects the critical level of external overpressure and the natural oscillation frequencies of the objects under consideration. Numerical values of the studied parameters are given, the reliability of which is confirmed by similarity with the data given in previously published sources. Recommendations are given on application of the proposed approach in engineering verification of carriage structure elements stability. The necessity of taking into account the forms of oscillations and loss of stability when determining the level of critical pressure by the obtained expression is shown.","PeriodicalId":118708,"journal":{"name":"Herald of the Ural State University of Railway Transport","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128705469","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}

引用次数: 0

To the strategic management platform of transport infrastructure 交通基础设施战略管理平台

Herald of the Ural State University of Railway Transport Pub Date : 1900-01-01 DOI: 10.20291/2079-0392-2023-2-45-55

V. Tsyganov

{"title":"To the strategic management platform of transport infrastructure","authors":"V. Tsyganov","doi":"10.20291/2079-0392-2023-2-45-55","DOIUrl":"https://doi.org/10.20291/2079-0392-2023-2-45-55","url":null,"abstract":"The challenges of strategic management of the transport infrastructure in the conditions of geopolitical and sanction pressure on Russia are considered. In order to support decision-making concerning its development, it is proposed to use a set of strategic management models successfully applied in strategic planning of the sustainable functioning of the Russian economy, including Siberia, the Russian Arctic and the Far East, as well as in JSC «Russian Railways». The adoption of these and other decisions in the improved model of public administration should be based on the array of data on the conditions of economic entities and internal and external factors affecting them. This requires creation of the national public administration platform. The strategic transport infrastructure management platform should become an integral part of it. As a theoretical basis for its construction, it is proposed to use the theory of large transport systems. On the basis of this theory, a design solution for creation of the strategic transport infrastructure management platform based on the above-mentioned set of models and requirements of regulatory documents is proposed. As an example, one of the subprocesses of the design solution is considered - mathematical modeling and forecasting of the consequences of the onset of new events for transport infrastructure based on the theory of large transport systems. At the same time, the state of the infrastructure is formally determined as a result of the interaction (decision of the game) of interested parties under certain mechanisms of public administration. The solutions of the game of the subjects - users of the transport infrastructure and its efficiency criteria before and after the onset of new events are determined.","PeriodicalId":118708,"journal":{"name":"Herald of the Ural State University of Railway Transport","volume":"159 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128749698","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}

引用次数: 0