World of Transport and Transportation最新文献

{"title":"Analysis of the Relationship between Rail Cant and Track Gauge Based on the Data Obtained by Track Recording Cars","authors":"Damir I. Gallyamov, Dmitry Ovchinnikov","doi":"10.30932/1992-3252-2022-20-6-4","DOIUrl":"https://doi.org/10.30932/1992-3252-2022-20-6-4","url":null,"abstract":"The increase in the service life of track superstructure has always been an important task since this allows reduction in the cost of repairs and current maintenance of the track.The objective of the work is to determine the mutual influence of the rail cant and the track gauge based on the results of measurements carried out by track recording cars, as well as their impact on the stress-strain state of the rail. The analysis was based on statistical and the finite element methods. Using statistical methods, it was determined that the rail cant and track gauge values do not have a normal distribution and have a weak feedback. The reasons were explained in the conclusions.To determine with the finite element method contact stresses in the rail head on the track sections available in the sample, with different combinations of rail cant and track gauge, a model with full geometric similarity was developed.The results obtained from the calculations demonstrate that the deviation of the cant within the range from 1/15 to 1/30 leads to an increase in stresses by more than 20 %, while changing the track gauge has a weak effect on the stress-strain state of the rail head. The maximum increase in contact stresses, at the analysed section, was 97 %, with a cant of 1/990 and a track gauge of 1526 mm.The growth of contact stresses leads to the formation of fatigue cracks and, as a consequence, to the defects and then to replacement of the rail. To increase the service life of the rails, it is recommended to monitor the condition of fasteners and compliance with the technology of current maintenance works, as well as to reconsider tolerance of the deviation of the cant both upward and downward.","PeriodicalId":121504,"journal":{"name":"World of Transport and Transportation","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134042128","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":"Additional Criteria of Change of Curvature and Temperature of Rails for Monitoring the Pre-Failure State of a Continuous Welded Rail in Plan","authors":"V. Atapin","doi":"10.30932/1992-3252-2022-20-6-3","DOIUrl":"https://doi.org/10.30932/1992-3252-2022-20-6-3","url":null,"abstract":"The article discusses proposals referring to a new way to control the state of a continuous welded rail.The main factors that have the greatest impact on the state of a continuous welded rail are displacement of rail and the state of a continuous welded rail in plan. This group of factors describes the temperature-stressed nature of operation of a continuous welded rail. Evaluated factors determining the properties which prevent displacement include the state of rail fastenings, the width of the shoulder of the ballast prism, the presence of hanging and unsupported sleepers, and fulness of the ballast cribs, space between the sleepers.The combination of these factors makes it possible to identify a complex coefficient with a high degree of reliability to assess the pre-failure state of a continuous welded rail associated with the risk of loss of stability of a continuous welded rail, the degree of danger of violation of train traffic safety.In order to assess the state of a continuous welded rail and the degree of its deterioration, the paper presents evaluation criteria. They allow getting a comprehensive picture of the state of any section of a continuous welded rail based on the results of its inspection by diagnostic tools and creating a list of recommendations to eliminate the identified violations.The paper highlights also the shortcomings of the existing methodology for assessing the state of a continuous welded rail in plan, which is based on the analysis of changes in the curvature of welded rails in plan in time. The retrospective analysis carried out by the author shows that there are cases of a sharp change in the state of a continuous welded rail in plan, which are currently not considered by the existing evaluation criteria. To increase detectability of such sections of a continuous welded rail, it is proposed to supplement the existing algorithm with additional evaluation criteria referring to changes in curvature of welded rails and in rail temperature, which allow timely identification of the places of a sharp change in the state in plan.Subsequent studies are suggested to establish the relationship between the rail temperature and the sites of a sharp change in the state of a continuous welded rail in plan.","PeriodicalId":121504,"journal":{"name":"World of Transport and Transportation","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124285146","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":"Modelling of Air Passenger Transportation in Russia","authors":"O. Sushko, O. Sushko","doi":"10.30932/1992-3252-2022-20-6-7","DOIUrl":"https://doi.org/10.30932/1992-3252-2022-20-6-7","url":null,"abstract":"The use of economic and mathematical methods of forecasting the results of activities of civil aviation organisations, and in particular assessment of the volume of air passenger traffic is quite relevant due to the importance of operational planning of air transport processes, development of strategic directions, technological and technical renewal of air enterprises.The objective of the study is to plan the traffic flow of air passengers using a regression model, considering the results of multifactorial selection of determinants, particularly distinguishing fundamental macro indicators are distinguished, as well as significant indicators of the aviation market.The study of passenger air transportation was carried out using methods of system analysis, methods of mathematical statistics and econometrics. Modelling of the process of passenger transportation has identified the main determinants that positively or negatively affect the dynamics of air passenger traffic. The multiple regression of the study of the processes of connectivity and synchronicity of changes in development of passenger traffic and selected macro indicators in a generalised form is the sum of vectors of influencing variables adjusted for the calculated coefficients.Six-, four- and three-factor regression models were developed. The three-factor model turned to be more reliable with values most close to actual data. Nevertheless, while applying regression model for forecasting air traffic it is necessary to consider not only theoretical aspects, data of official forecasts of macro indicators but expert opinions as well.","PeriodicalId":121504,"journal":{"name":"World of Transport and Transportation","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130626262","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":"Bibliography. The Most Significant Works of Professor N. P. Petrov","authors":"A. Editorial","doi":"10.30932/1992-3252-2022-20-6-13","DOIUrl":"https://doi.org/10.30932/1992-3252-2022-20-6-13","url":null,"abstract":"In this issue, instead of a review of new books or textbooks on transport and transportation, paying tribute to the oeuvres of our predecessors, the journal reproduces a bibliographic article first appeared more than a century ago in the journal «Zheleznodorozhnoe delo» [Rail Business]. The editors hope that it will help to get an idea of how concise, meaningful and, in modern terms, informative reviews of scientific literature were compiled at that time, as well as the range of scientific problems considered.By tradition, the publication retains the vocabulary, punctuation and abbreviations adopted at the beginning of the 20th century.","PeriodicalId":121504,"journal":{"name":"World of Transport and Transportation","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129136715","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":"The Fourth Industrial Revolution and its Impact on Railways","authors":"E. Sotnikov, K. Shenfeld","doi":"10.30932/1992-3252-2022-20-6-1","DOIUrl":"https://doi.org/10.30932/1992-3252-2022-20-6-1","url":null,"abstract":"The analysis of the stages of development of industrial production by human society based on the well-known concept of four industrial revolutions has resulted in retrospection of technical and technological development of railways during the periods between the industrial revolutions in terms of core rail engineering systems (infrastructure, rolling stock, control and management system), as well as contributed to outline prospects for foreseeable period. It has allowed to identify main directions of technical and technological development of productive forces characteristic of the fourth industrial revolution.The objective of the research was to identify those directions that are appropriate to be applied in relation to rail transport as well as to choose a few specific technical and technological solutions.In the field of digitalisation, it is proposed to focus on development and implementation of intelligent management systems for each workplace or of intelligent workplaces (IWP), which ensure development of optimal solutions for numerous operational tasks fulfilled by the dispatchers on duty at railway facilities. It has been determined that for a case of a large rail company like JSC Russian Railways creation of managers’ IWPs should be based on the scale and generality of the tasks solved at numerous similar managed objects since, for example, the number of dispatching sections reaches more than 400, the number of stations and simultaneously moving trains is of several thousand, and of train sheds and infrastructure sections is of several hundred, etc. This allows creating standard systems that are further replicated for specific workplaces while considering local specifics.Intelligent systems integrate as important elements fast-growing production of increasingly miniaturised, and to be underlined, constantly cheaper sensors, capable today of being built into almost any objects that in terms of railways comprise, for example, a wheel of a wagons or of a locomotive, engines, rails, any wagons or containers. This allows continuously monitoring the current state of any objects, as well as their nodes resulting in fundamentally new opportunities for reducing the cost of maintenance of rolling stock and infrastructure, as well as ensuring transport safety. Thus, for the first time ever, the task of achieving «absolute» rail traffic safety can be set.The article includes a forecast of the approximate time of the advent of the fifth industrial revolution and the trajectories of development of technical systems of railways for the period before its start. The use of the results of the study is supposed to facilitate to concretise directions of the promising technical and technological development of rail transport.","PeriodicalId":121504,"journal":{"name":"World of Transport and Transportation","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115224426","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":"Obtaining Arctic Diesel Fuel for Reliable Operation of Vehicles in the Areas of the Far North and the Arctic","authors":"E. L. Iovleva, M. P. Lebedev, N. A. Filippova","doi":"10.30932/1992-3252-2022-20-6-2","DOIUrl":"https://doi.org/10.30932/1992-3252-2022-20-6-2","url":null,"abstract":"In the Republic of Sakha (Yakutia) there are many winter roads for transportation of food and essential goods. As a rule, vehicles are running on a diesel fuel on such roads. Despite the difficulties in operating diesel vehicles under extremely low temperatures, diesel vehicles are much more powerful and economical than gasoline ones. Problems with start and operation of a diesel engine are associated with low-temperature properties of diesel fuel. The process involved in refining oil to create a winter class diesel fuel is expensive and complex because paraffinic hydrocarbons must be removed.Therefore, today it is important to produce winter classes of diesel fuel by compounding a pour point depressant and a summer class of fuel. When using additives, problems arise with the choice of their concentration. Those limits that the manufacturer recommends in real life show a negative result.There is no wide range of those additives in Yakutia so the authors chose for experiments Dewaxol additives that diminish sedimentation during fuel transportation. So, during the study of the impact of Dewaxol additive, that contained amides and imides of mono- and dicarboxylic acids on the diesel fuel, it was considered how, at various concentrations of the additive and the heating temperature of fuel, the cloud point decreases, and sedimentation stability improves. The least squares method has allowed describing optimal concentration of pour point depressant. The study resulted in the conclusion that the fuel with a high content of depressant-dispersant additive has the best sedimentation stability.","PeriodicalId":121504,"journal":{"name":"World of Transport and Transportation","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130836807","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":"Road Safety in the Arctic Zone of the Russian Federation","authors":"","doi":"10.30932/1992-3252-2022-20-5-8","DOIUrl":"https://doi.org/10.30932/1992-3252-2022-20-5-8","url":null,"abstract":"The article deals with the issue of road safety in the Arctic zone of the Russian Federation.The analysis of road traffic accidents over the past 10 years that occurred in the Arctic zone of the Republic of Sakha (Yakutia) was carried out for the first time ever. The study refers to the total number of road traffic accidents, accidents due to the fault of pedestrians, accidents due to the unsatisfied condition of streets and roads, accidents involving children under 16 years of age, accidents involving drivers with signs of alcohol intoxication and accidents committed by drivers without the right to drive vehicles. Based on the data obtained, a coefficient K was proposed that characterises the state of road safety in the Arctic regions in comparison with traffic safety in general in the Republic of Sakha (Yakutia).The analysis of road traffic accident statistics has shown that many accidents are the fault of drivers without a driver’s license and revealed the districts with respectively the highest and lowest number of accidents as per their types listed above.Despite the huge territory and the small number of inhabitants, and consequently the low population density, the number of accidents in the Arctic zone of the Republic of Sakha (Yakutia) has been increasing every year necessitating efforts to improve road safety.","PeriodicalId":121504,"journal":{"name":"World of Transport and Transportation","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115057576","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":"Humanitarian Legal Regulation of Employment of Hospital Ships under Modern Conditions","authors":"I. Kholikov","doi":"10.30932/1992-3252-2022-20-5-9","DOIUrl":"https://doi.org/10.30932/1992-3252-2022-20-5-9","url":null,"abstract":"The article deals with some problematic issues of using hospital ships for transporting the wounded, sick and shipwrecked under the conditions of an armed conflict at sea.A retrospective analysis refers to emergence and development of legal norms governing the use of hospital ships during armed conflicts. Particular attention is paid to regulation by the standards of international humanitarian law of the issues of protection of hospital vessels from attacks and capture, transport of certain categories of persons and cargo followed by a review of the relevant international legal norms and of the practices of individual states in matters of transporting the wounded and sick, as well as of providing them with medical care at sea. A particular task was to get Journal’s audience acquainted with the review of the selected legal commentaries of ICRS on the Geneva Convention for the Amelioration of the Condition of Wounded, Sick and Shipwrecked Members of Armed Forces at Sea of August 12, 1949 (GC II) and some other provisions of the relevant international humanitarian treaties in the field of hospital ships. The commentaries first ever published in Russian were selected, structured, and additionally elaborated by the author according to the concept of the article, as well as supplemented by the references to the results of modern research.Based on a study of modern realities, the conclusion is substantiated about the sufficiency of the existing norms of international humanitarian law and the obvious need for adequate use of their potential in relation to the conditions of our times.","PeriodicalId":121504,"journal":{"name":"World of Transport and Transportation","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121744918","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":"The Influence of the Socionic Characteristics of a Pilot on the Features of Perception and Interpretation of Displayed Flight Instrument Information","authors":"O. A. Arinicheva, A. V. Malishevsky","doi":"10.30932/1992-3252-2022-20-5-11","DOIUrl":"https://doi.org/10.30932/1992-3252-2022-20-5-11","url":null,"abstract":"The article continues a series of papers by the authors of the results of the study on perception and interpretation by a pilot of visual information provided by flight instruments. The data presented refer to experiments conducted in 2021–2022 with a sample of 50 cadet pilots. According to V. A. Sychev, the wellknown aviation professor, in the piloting technique, perceptual errors are most common. Among many flight instruments important for piloting an aircraft, there is one whose influence on the «Loss of control in-flight» (LOC–I) problem is the greatest – this is the attitude indicator. Several catastrophes are associated with perceptual errors of the readings of attitude indicators. One of the most tragic accidents of this kind was the crash near Perm on September 14, 2008, of a Boeing‑737 aircraft.The paper presents the results of a comparative study carried out to identify individual differences in perception and interpretation by tested cadet pilots of the roll indications on the attitude indicator with the «inside-out» and «outside-in» display options. During task performance, the participants were presented with a sequential series of images in the form of slides with roll indications of the attitude indicator with different display options. The experiment was carried out using a stationary Eye Tracker Tobii REX device. The analysis and processing of the data obtained was carried out using a special computer software developed by A. P. Plyasovskikh at the All-Russian scientific Research Institute of Radio Equipment. The participants to the experiment underwent also psychodiagnostics using Keirsey and MM‑1 socionic tests. Results were subject to mathematical processing with correlation analysis and G-sign test.The arguments given by some authors in favour of the «outside-in» version of the indication were fully confirmed since the number of errors when determining the side of the roll on the «inside-out» display of the attitude indicator turned out to be seven times higher than on the «outside-in» display. The hypothesis that socionic characteristics are predictors of the pilot’s correct perception and interpretation of visual instrumental information has not been confirmed. It is possible that the absence of significant correlations was also influenced by the significant uniformity in the socionic characteristics of the surveyed persons.","PeriodicalId":121504,"journal":{"name":"World of Transport and Transportation","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126598132","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":"Reducing the Shortage of Railway Capacity through Introduction of Interval Regulation of Train Traffic","authors":"P. Kurenkov, I. Solop, E. Chebotareva, E. A. Gerasimova, N. V. Kurganova","doi":"10.30932/1992-3252-2022-20-5-6","DOIUrl":"https://doi.org/10.30932/1992-3252-2022-20-5-6","url":null,"abstract":"The article presents various options for technical and technological provisions to develop the capacity of railway lines, where there is a need to master the increasing volumes of traffic caused by various factors, for example, changes in national and world cargo flows, passenger flows.The paper considers provisions undertaken to adopt and effectively implement a new technology of virtual coupling in the interval regulation of train traffic in the conditions of limited railway capacity which makes it possible to reduce inter-train intervals, electricity costs of traction as well as of infrastructure maintenance. This type of interval control allows controlling the following locomotive considering the information that is transmitted over the radio from the locomotive of the pilot train in front. The problems that arise during the traffic process controlled through virtual coupling mode are also identified followed by the model calculations referring to a system being introduced of stimulation and bonuses awarding intended for assistant station masters and traffic dispatchers of traction divisions respective of the number of dispatched and transit trains controlled through virtual coupling mode.","PeriodicalId":121504,"journal":{"name":"World of Transport and Transportation","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123362585","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}