Pub Date : 2019-04-05DOI: 10.17816/TRANSSYST20195154-73
Yuri F. Antonov
Aim: to describe scientific achievement providing the essence of the phenomenon; to confirm reliability of existence of DC electromagnetic induction using direct evidence. Methods: experimental research into magnetizing superconducting samples. Visualisation of intermediate and mixed state of superconductors and movement of quantised threads of magnetic flux, the beams of such threads. Development of mathematical theory on the basis of fractal geometry and functional analysis. Results: The essence of the scientific discovery consists in the proof that the direct consequence of the formation of an intermediate-mixed state of superconductors and the movement of quantum magnetic fluxes threads, beams of such filaments and macroscopic normal zones is the phenomenon of direct current electromagnetic induction. Conclusion: the discovery of DC electromagnetic induction has been made, superconducting topological electrical generators on the basis of DC electromagnetic induction have been built, that achieve high nominal parameters: 10-100 kA current, specific current load - 1 kA/kg.
{"title":"The nature of voltage in superconductors with dynamic intermediate-mixed state","authors":"Yuri F. Antonov","doi":"10.17816/TRANSSYST20195154-73","DOIUrl":"https://doi.org/10.17816/TRANSSYST20195154-73","url":null,"abstract":"Aim: to describe scientific achievement providing the essence of the phenomenon; to confirm reliability of existence of DC electromagnetic induction using direct evidence. \u0000Methods: experimental research into magnetizing superconducting samples. Visualisation of intermediate and mixed state of superconductors and movement of quantised threads of magnetic flux, the beams of such threads. Development of mathematical theory on the basis of fractal geometry and functional analysis. \u0000Results: The essence of the scientific discovery consists in the proof that the direct consequence of the formation of an intermediate-mixed state of superconductors and the movement of quantum magnetic fluxes threads, beams of such filaments and macroscopic normal zones is the phenomenon of direct current electromagnetic induction. \u0000Conclusion: the discovery of DC electromagnetic induction has been made, superconducting topological electrical generators on the basis of DC electromagnetic induction have been built, that achieve high nominal parameters: 10-100 kA current, specific current load - 1 kA/kg.","PeriodicalId":100849,"journal":{"name":"Journal of Transportation Systems Engineering and Information Technology","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75092351","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}
Pub Date : 2019-04-05DOI: 10.17816/TRANSSYST20195126-41
M. Fedorova, Федорова Мария Владимировна
Abstract. Assessment of public efficiency of rapid urban transport development strategy is the final stage in the formation of a strategy for the development of rapid transport. The rapid urban transport development strategy is distinguished by the following main characteristics: significant initial investment, which in some cases is considered as an objective obstacle to adoption and implementation of the strategy; long timeframes for implementation of the strategy; timing of the achievement of the goals; use of financial resources. These characteristics enhance the current cost of the project. The process of measuring the results a new transport project implementation is complicated, because a significant part of the results is of external character and is not subject to cost measuring. The peculiarities listed above prove the relevance of determination of public efficiency rapid urban transport development strategy. Considering the specifics of the object of the research, the comparison of costs and results of innovative transport product implementation should be carried out within assessment of its public efficiency. The aim of this work is to develop a system of indicators for assessment of public efficiency of rapid urban transport development strategy; study of existing public efficiency assessment methods, search for their advantages and disadvantages, and research into maglev technology advantages. The system of indicators proposed to assess public efficiency of rapid urban transport development strategy, considers all advantages of maglev technology and prioritises it in selecting rapid urban transport.
{"title":"Evaluation of public effectiveness of the strategy for development of speed urban transport","authors":"M. Fedorova, Федорова Мария Владимировна","doi":"10.17816/TRANSSYST20195126-41","DOIUrl":"https://doi.org/10.17816/TRANSSYST20195126-41","url":null,"abstract":"Abstract. Assessment of public efficiency of rapid urban transport development strategy is the final stage in the formation of a strategy for the development of rapid transport. \u0000The rapid urban transport development strategy is distinguished by the following main characteristics: \u0000 \u0000significant initial investment, which in some cases is considered as an objective obstacle to adoption and implementation of the strategy; \u0000long timeframes for implementation of the strategy; \u0000timing of the achievement of the goals; \u0000use of financial resources. \u0000 \u0000These characteristics enhance the current cost of the project. The process of measuring the results a new transport project implementation is complicated, because a significant part of the results is of external character and is not subject to cost measuring. \u0000The peculiarities listed above prove the relevance of determination of public efficiency rapid urban transport development strategy. Considering the specifics of the object of the research, the comparison of costs and results of innovative transport product implementation should be carried out within assessment of its public efficiency. \u0000The aim of this work is to develop a system of indicators for assessment of public efficiency of rapid urban transport development strategy; study of existing public efficiency assessment methods, search for their advantages and disadvantages, and research into maglev technology advantages. \u0000The system of indicators proposed to assess public efficiency of rapid urban transport development strategy, considers all advantages of maglev technology and prioritises it in selecting rapid urban transport.","PeriodicalId":100849,"journal":{"name":"Journal of Transportation Systems Engineering and Information Technology","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75103382","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}
Pub Date : 2019-04-05DOI: 10.17816/TRANSSYST20195174-88
V. Tretyak, Maria A. Lyakina, E. Volkova
Background: Industry 4.0 involves transition from industrial organisation of production to the dominance of post-industrial technological paradigms. Magnetic levitation is one of the promising technologies of transport. Aim: to justify the choice of institutional forms, which encourage promotion of innovative technologies (including magnetic levitation technologies) in the real economy of Russia. Methods: to achieve the goal, such general research methods as analogy, comparative analysis, generalisation, hypothetical method, historical method, and system’s theory have been used. Results: the relevance of carrying out fundamental foresight to determine perspectives of using maglev systems in the national economy has been substantiated. It has also been suggested that, in order to intensively promote maglev systems innovative projects, a special fund for their introduction into the real sectors of the national economy through civil institutions should be established. Finally, options, and developments in certain cases, of elaboration of target programmes initiated by the authorities are considered. Conclusion: the realisation of the proposed measures through civil institutions and the authorities will result in determining the longer-term prospects for maglev technologies market development. The foresight project will provide opportunity to actuate the society on the issue of maglev systems development, considering differences between own interests of the groups involved, and to outline pixelated scenarios of the forthcoming future in terms of maglev transport as the product of the Industry 4.0 and transition to post-industrial technological paradigm predominance.
{"title":"Institutional forms of promotion of magnetic levitation technologies and their implementation in the economy of the Russian Federation","authors":"V. Tretyak, Maria A. Lyakina, E. Volkova","doi":"10.17816/TRANSSYST20195174-88","DOIUrl":"https://doi.org/10.17816/TRANSSYST20195174-88","url":null,"abstract":"Background: Industry 4.0 involves transition from industrial organisation of production to the dominance of post-industrial technological paradigms. Magnetic levitation is one of the promising technologies of transport. \u0000Aim: to justify the choice of institutional forms, which encourage promotion of innovative technologies (including magnetic levitation technologies) in the real economy of Russia. \u0000Methods: to achieve the goal, such general research methods as analogy, comparative analysis, generalisation, hypothetical method, historical method, and system’s theory have been used. \u0000Results: the relevance of carrying out fundamental foresight to determine perspectives of using maglev systems in the national economy has been substantiated. It has also been suggested that, in order to intensively promote maglev systems innovative projects, a special fund for their introduction into the real sectors of the national economy through civil institutions should be established. Finally, options, and developments in certain cases, of elaboration of target programmes initiated by the authorities are considered. \u0000Conclusion: the realisation of the proposed measures through civil institutions and the authorities will result in determining the longer-term prospects for maglev technologies market development. The foresight project will provide opportunity to actuate the society on the issue of maglev systems development, considering differences between own interests of the groups involved, and to outline pixelated scenarios of the forthcoming future in terms of maglev transport as the product of the Industry 4.0 and transition to post-industrial technological paradigm predominance.","PeriodicalId":100849,"journal":{"name":"Journal of Transportation Systems Engineering and Information Technology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89683883","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}
Pub Date : 2019-04-05DOI: 10.17816/TRANSSYST20195189-102
N. Zhuravleva
New economy forms a new value of transport service, in which the cost of time is becoming the most important factor in substantiation of investment decisions. Aim: the aim of the work is to form the methodological basis and procedures of economic substantiation of magnetic levitation based transport. Methods: the research builds on economic laws (keeping integration and high revenues) describing a new economic paradigm, methods of analysis of reason-and-consequence relation between speed and maximum revenue. The conclusions are based on representative summary of data about investment, operational and organisational costs of existing and designed high-speed lines. Results: design of a two-dimensional matrix of combination of maglev technologies with modular intermodal configuration, which enables building a scheme of economic assessment using rules of modular and architectural innovations’ combination. Consequently, the assessment process for transportation pricing from the point of view of maximum revenues for manufacturers and due mobility for population.
{"title":"Conceptual basis for assessment of effects of magnetic levitation-based high-speed transport systems projects development","authors":"N. Zhuravleva","doi":"10.17816/TRANSSYST20195189-102","DOIUrl":"https://doi.org/10.17816/TRANSSYST20195189-102","url":null,"abstract":"New economy forms a new value of transport service, in which the cost of time is becoming the most important factor in substantiation of investment decisions. \u0000Aim: the aim of the work is to form the methodological basis and procedures of economic substantiation of magnetic levitation based transport. \u0000Methods: the research builds on economic laws (keeping integration and high revenues) describing a new economic paradigm, methods of analysis of reason-and-consequence relation between speed and maximum revenue. The conclusions are based on representative summary of data about investment, operational and organisational costs of existing and designed high-speed lines. \u0000Results: design of a two-dimensional matrix of combination of maglev technologies with modular intermodal configuration, which enables building a scheme of economic assessment using rules of modular and architectural innovations’ combination. Consequently, the assessment process for transportation pricing from the point of view of maximum revenues for manufacturers and due mobility for population.","PeriodicalId":100849,"journal":{"name":"Journal of Transportation Systems Engineering and Information Technology","volume":"53 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87802866","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}
Pub Date : 2019-04-05DOI: 10.17816/TRANSSYST2019515-25
H. P. Ferreira, R. Stephan
This paper will present the ACV working principle and a review of the past research developments of high-speed ACV trains and their efforts in countries like, Brazil, France, Germany, Italy, United Kingdom, and United States, and the low-speed ACV trains, revealing why the former did not match the expectations and failed, while the latter have been prospered and purchase a well-established market niche in short distance paths. Finally, this study will promote a direct comparison between the two technologies, ACV and MagLev, with advantages and disadvantages of each one. The ACV development will bring important insights to the research of MagLev trains from a technical and economic perspective, learning with errors of the ACV, that did not enable any high-speed projects to flourish, and, on other hand, the comparative success of the urban ACV, as a complete commercial solution, like the MagLev trains.
{"title":"Air Cushion Vehicle (ACV): History Development and Maglev Comparison","authors":"H. P. Ferreira, R. Stephan","doi":"10.17816/TRANSSYST2019515-25","DOIUrl":"https://doi.org/10.17816/TRANSSYST2019515-25","url":null,"abstract":"This paper will present the ACV working principle and a review of the past research developments of high-speed ACV trains and their efforts in countries like, Brazil, France, Germany, Italy, United Kingdom, and United States, and the low-speed ACV trains, revealing why the former did not match the expectations and failed, while the latter have been prospered and purchase a well-established market niche in short distance paths. \u0000Finally, this study will promote a direct comparison between the two technologies, ACV and MagLev, with advantages and disadvantages of each one. The ACV development will bring important insights to the research of MagLev trains from a technical and economic perspective, learning with errors of the ACV, that did not enable any high-speed projects to flourish, and, on other hand, the comparative success of the urban ACV, as a complete commercial solution, like the MagLev trains.","PeriodicalId":100849,"journal":{"name":"Journal of Transportation Systems Engineering and Information Technology","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85272303","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}
Pub Date : 2018-12-19DOI: 10.17816/TRANSSYST201844112-128
E. Chao, C. Eugene, J. Venturi, Venturi Jim
Background: Magnetic Levitation (Maglev) systems have a noticeable operating track record in about a dozen countries. Higher speed maglev technology has been built for many intercity and regional lines in China, Germany, Japan, South Korea, United States, Brazil, and other countries. Maglev developers claim that the transcontinental high speed system can outperform the existing HSR and air transport and can achieve higher speed, have lower energy consumption and life cycle costs, attract more passengers, and boost regional economy. The article presents a systematic breakdown of the proposed transcontinental high speed Maglev system and pinpoints critical operational components and implementation measures. The analyses reach the following discussions on the three most important system characteristics. Firstly, the transcontinental high speed Maglev had to make trade-offs among passenger access time to total travel time, station density to daily maximum operating speed, and operating strategy to daily skip-stop, express, as well as other accelerated services. Secondly, the correlation between systems capacity management and vehicle interior space design (e.g. seats) has a serious impact on operators’ long-term financial condition. The involvement of identifying the equilibrium between these two factors in a linear algebra method is substantial. Thirdly, the transcontinental high speed Maglev station must serve as the multimodal transportation hub. To attract passengers; accordingly, increase the ridership and farebox recovery, an unified transfer service on schedule coordination has to be incorporated into the system. Timed Transfer Systems (TTS) had the proven capability of increasing service reliability across different modes. Based on these discussions, the framework and direction of transcontinental high speed Maglev strategic planning is becoming sensible. Aim: The article addresses the major system design elements of transportation planning and pinpoints corresponding operational strategies, which are useful for the planning and design of maglev. The study will assist system designers, network planners, and operators to understand where the technical and operational boundaries are for this particular mode. Knowing the boundary is useful for the design, planning, and operations of the system. Methods: The efforts of literature reviews focus on two fields: composition of major system design elements and interrelation with other modes of transportation. The method examines the foundation of maglev planning. Results: First, the benefit of speed increase cannot be hasty generalized. The assessment of speed increase needs to break down to different beneficiaries (e.g. operator, passenger, and the community). Second, system capacity depends on its operating speed, service frequency, load factor, and vehicle size. These four factors further determine the operational feasibility of the maglev. Finally, in a dispersed travel pattern, TTS increas
{"title":"Operational breakdown and performance measure of the transcontinental High-speed magleva","authors":"E. Chao, C. Eugene, J. Venturi, Venturi Jim","doi":"10.17816/TRANSSYST201844112-128","DOIUrl":"https://doi.org/10.17816/TRANSSYST201844112-128","url":null,"abstract":"Background: Magnetic Levitation (Maglev) systems have a noticeable operating track record in about a dozen countries. Higher speed maglev technology has been built for many intercity and regional lines in China, Germany, Japan, South Korea, United States, Brazil, and other countries. Maglev developers claim that the transcontinental high speed system can outperform the existing HSR and air transport and can achieve higher speed, have lower energy consumption and life cycle costs, attract more passengers, and boost regional economy. The article presents a systematic breakdown of the proposed transcontinental high speed Maglev system and pinpoints critical operational components and implementation measures. The analyses reach the following discussions on the three most important system characteristics. \u0000Firstly, the transcontinental high speed Maglev had to make trade-offs among passenger access time to total travel time, station density to daily maximum operating speed, and operating strategy to daily skip-stop, express, as well as other accelerated services. \u0000Secondly, the correlation between systems capacity management and vehicle interior space design (e.g. seats) has a serious impact on operators’ long-term financial condition. The involvement of identifying the equilibrium between these two factors in a linear algebra method is substantial. \u0000Thirdly, the transcontinental high speed Maglev station must serve as the multimodal transportation hub. To attract passengers; accordingly, increase the ridership and farebox recovery, an unified transfer service on schedule coordination has to be incorporated into the system. Timed Transfer Systems (TTS) had the proven capability of increasing service reliability across different modes. Based on these discussions, the framework and direction of transcontinental high speed Maglev strategic planning is becoming sensible. \u0000Aim: The article addresses the major system design elements of transportation planning and pinpoints corresponding operational strategies, which are useful for the planning and design of maglev. The study will assist system designers, network planners, and operators to understand where the technical and operational boundaries are for this particular mode. Knowing the boundary is useful for the design, planning, and operations of the system. \u0000Methods: The efforts of literature reviews focus on two fields: composition of major system design elements and interrelation with other modes of transportation. The method examines the foundation of maglev planning. \u0000Results: First, the benefit of speed increase cannot be hasty generalized. The assessment of speed increase needs to break down to different beneficiaries (e.g. operator, passenger, and the community). Second, system capacity depends on its operating speed, service frequency, load factor, and vehicle size. These four factors further determine the operational feasibility of the maglev. Finally, in a dispersed travel pattern, TTS increas","PeriodicalId":100849,"journal":{"name":"Journal of Transportation Systems Engineering and Information Technology","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86036039","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}
Pub Date : 2018-12-19DOI: 10.17816/TRANSSYST201844138-145
A. Kornienko, A. Glukhov, S. Diasamidze, Alexander M. Shatov
Background: The article examines the issues of regulation and the development of methodological approaches to ensuring the security of the software system for the management of magnetic-leaving transport at all stages of the life cycle, as well as the development of a tool to detect high-level (logical) software vulnerabilities. Aim: Development of a methodology for the creation of an error-free and impact-resistant software for the management system of magnetic-levitational transport. Methods: In the development of the methodology, the existing practices of searching for errors and vulnerabilities in software and approaches to the algorithmization of program code were studied. Results: During the study, a methodology was developed for creating an error-free and impact-resistant software for the management system of magnetic-levitational transport, which makes it possible to exclude the possibility of errors in the software, which significantly increases the safety of the overall transportation process. Conclusion: The application of the developed technique will improve the security of software for magnetic levitation transport control system from destructive external influences
{"title":"Software protection of the maglev transport control system","authors":"A. Kornienko, A. Glukhov, S. Diasamidze, Alexander M. Shatov","doi":"10.17816/TRANSSYST201844138-145","DOIUrl":"https://doi.org/10.17816/TRANSSYST201844138-145","url":null,"abstract":"Background: The article examines the issues of regulation and the development of methodological approaches to ensuring the security of the software system for the management of magnetic-leaving transport at all stages of the life cycle, as well as the development of a tool to detect high-level (logical) software vulnerabilities. \u0000Aim: Development of a methodology for the creation of an error-free and impact-resistant software for the management system of magnetic-levitational transport. \u0000Methods: In the development of the methodology, the existing practices of searching for errors and vulnerabilities in software and approaches to the algorithmization of program code were studied. \u0000Results: During the study, a methodology was developed for creating an error-free and impact-resistant software for the management system of magnetic-levitational transport, which makes it possible to exclude the possibility of errors in the software, which significantly increases the safety of the overall transportation process. \u0000Conclusion: The application of the developed technique will improve the security of software for magnetic levitation transport control system from destructive external influences","PeriodicalId":100849,"journal":{"name":"Journal of Transportation Systems Engineering and Information Technology","volume":"65 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73905626","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}
Pub Date : 2018-12-19DOI: 10.17816/TRANSSYST20184444-63
A. Santangelo, Santangelo Andrea
Hyperloop is often described as the "fifth mode of transportation" but, as the race between competing companies around the world intensifies, investors, governments and scientists remain cold and cautious. An educated guess from one of the first civil engineers involved with the design of a real-world hyperloop infrastructure tries to give some direction between hype and pragmatic design
{"title":"Hyperloop as an evolution of maglev","authors":"A. Santangelo, Santangelo Andrea","doi":"10.17816/TRANSSYST20184444-63","DOIUrl":"https://doi.org/10.17816/TRANSSYST20184444-63","url":null,"abstract":"Hyperloop is often described as the \"fifth mode of transportation\" but, as the race between competing companies around the world intensifies, investors, governments and scientists remain cold and cautious. An educated guess from one of the first civil engineers involved with the design of a real-world hyperloop infrastructure tries to give some direction between hype and pragmatic design","PeriodicalId":100849,"journal":{"name":"Journal of Transportation Systems Engineering and Information Technology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86461499","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}
Pub Date : 2018-12-19DOI: 10.17816/TRANSSYST201844129-137
Ying Yang, Wenyue Zhang, Laisheng Tong, Qibiao Peng, Hua Luo, Ji Suo
Background: For medium and low speed maglev transportation system, the eddy current will be induced in rail, which is made of solid steel, while the train is running. The levitation force of electromagnets will be weakened by the magnetic field generated by eddy current in the rail, especially at the position of the forefront electromagnets. With the increase of train running speed, the eddy current effect will also increase, which will reach 30 % at 100 km/h, and which will directly affect the levitation stability of the train during high-speed running. Put it another way, it will limit the further improvement of the running speed of the medium and low speed maglev train. Aim: In order to solve the above problem, and compensate the levitation force reduced by the eddy current effect. Methods: The FEA method is used to obtain the magnetic field distribution and levitation force changing with the train speed. And taking the middle and low speed maglev trains and rails of Changsha Maglev Express as the research object, we have adopted two solutions, and the prototypes of airsprings and levitation magnets are manufactured and tested in the train. Results: The test result show that the currents of the windings at the front end of the two forefront electromagnets are reduced obviously. Conclusion: In this paper, the medium and low speed maglev train and rail used by Changsha Maglev Express are studied, the eddy current effect is analyzed, and two solutions are proposed. The results show that the solution methods can alleviate the eddy current effects to some extent.
{"title":"Analysis and solution of eddy current induced in rail for medium and low speed maglev transportation system","authors":"Ying Yang, Wenyue Zhang, Laisheng Tong, Qibiao Peng, Hua Luo, Ji Suo","doi":"10.17816/TRANSSYST201844129-137","DOIUrl":"https://doi.org/10.17816/TRANSSYST201844129-137","url":null,"abstract":"Background: For medium and low speed maglev transportation system, the eddy current will be induced in rail, which is made of solid steel, while the train is running. The levitation force of electromagnets will be weakened by the magnetic field generated by eddy current in the rail, especially at the position of the forefront electromagnets. With the increase of train running speed, the eddy current effect will also increase, which will reach 30 % at 100 km/h, and which will directly affect the levitation stability of the train during high-speed running. Put it another way, it will limit the further improvement of the running speed of the medium and low speed maglev train. \u0000Aim: In order to solve the above problem, and compensate the levitation force reduced by the eddy current effect. \u0000Methods: The FEA method is used to obtain the magnetic field distribution and levitation force changing with the train speed. And taking the middle and low speed maglev trains and rails of Changsha Maglev Express as the research object, we have adopted two solutions, and the prototypes of airsprings and levitation magnets are manufactured and tested in the train. \u0000Results: The test result show that the currents of the windings at the front end of the two forefront electromagnets are reduced obviously. \u0000Conclusion: In this paper, the medium and low speed maglev train and rail used by Changsha Maglev Express are studied, the eddy current effect is analyzed, and two solutions are proposed. The results show that the solution methods can alleviate the eddy current effects to some extent.","PeriodicalId":100849,"journal":{"name":"Journal of Transportation Systems Engineering and Information Technology","volume":"2021 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87229373","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}
Pub Date : 2018-12-19DOI: 10.17816/TRANSSYST201844146-156
Guo-Qiang Wang, Song-Tao Hu, Guofeng Zeng, F. Ye, Wenhong Zu
Background: Shanghai Maglev Demonstration Line is the only commercial high-speed maglev train line in the world, which has multiple functions such as transportation, exhibition, tourism and sightseeing. Besides, Shanghai Maglev Demonstration Line has been in operation for 15 years, and has been operating safely and punctually. Maglev protected area are located within 30 meters of the left and right sides of the Shanghai Maglev Demonstration Line and unrelated persons are not allowed to enter the area. When there were external construction invading the protected area, it is neccessary to do the comprehensive technical monitoring and protection. Without similar project to refer to, Metro Line 13 traversing Shanghai Maglev Line was a big challenge. Therefore, effective measures should be taken to do the comprehensive technical monitoring. Finding the relation between the maglev deformation and shield construction parameters was an important part of the monitoring. Aim: This thesis aimed at finding the relation between the maglev deformation and shield construction parameters and controlling the maglev deformation in the crossing of Metro Line 13, thus guiding the shield construction. Methods: This thesis calculated the gray relation between the maglev deformation and shield construction parameters from the cause of deformation of the maglev by the gray relation analysis. Results: The construction parameters optimization and the sensitivity control are carried out. Meanwhile, combined with the measured results of deformation monitoring, the multi means parallel monitoring data are analyzed synthetically and the data are checked, and the construction parameters are adjusted reasonably to make the pier column deformation in the controllable permissible range, having ensured the safe operation of the maglev. Conclusion: The calculation results has provided a reference for realizing active control on the influence of shield construction on the maglev and has remedied the defect that could only use deformation monitoring but could not control the deformation actively in the past work. The gray relational analysis has a certain effect on controlling the influence of shield construction on surrounding structures and has certain reference significance for subsequent similar projects.
{"title":"Gray relational analysis between the maglev-structural deformation and construction parameters of the shield tunnel crossing the shanghai maglev protected area","authors":"Guo-Qiang Wang, Song-Tao Hu, Guofeng Zeng, F. Ye, Wenhong Zu","doi":"10.17816/TRANSSYST201844146-156","DOIUrl":"https://doi.org/10.17816/TRANSSYST201844146-156","url":null,"abstract":"Background: Shanghai Maglev Demonstration Line is the only commercial high-speed maglev train line in the world, which has multiple functions such as transportation, exhibition, tourism and sightseeing. Besides, Shanghai Maglev Demonstration Line has been in operation for 15 years, and has been operating safely and punctually. Maglev protected area are located within 30 meters of the left and right sides of the Shanghai Maglev Demonstration Line and unrelated persons are not allowed to enter the area. When there were external construction invading the protected area, it is neccessary to do the comprehensive technical monitoring and protection. Without similar project to refer to, Metro Line 13 traversing Shanghai Maglev Line was a big challenge. Therefore, effective measures should be taken to do the comprehensive technical monitoring. Finding the relation between the maglev deformation and shield construction parameters was an important part of the monitoring. \u0000Aim: This thesis aimed at finding the relation between the maglev deformation and shield construction parameters and controlling the maglev deformation in the crossing of Metro Line 13, thus guiding the shield construction. \u0000Methods: This thesis calculated the gray relation between the maglev deformation and shield construction parameters from the cause of deformation of the maglev by the gray relation analysis. \u0000Results: The construction parameters optimization and the sensitivity control are carried out. Meanwhile, combined with the measured results of deformation monitoring, the multi means parallel monitoring data are analyzed synthetically and the data are checked, and the construction parameters are adjusted reasonably to make the pier column deformation in the controllable permissible range, having ensured the safe operation of the maglev. \u0000Conclusion: The calculation results has provided a reference for realizing active control on the influence of shield construction on the maglev and has remedied the defect that could only use deformation monitoring but could not control the deformation actively in the past work. The gray relational analysis has a certain effect on controlling the influence of shield construction on surrounding structures and has certain reference significance for subsequent similar projects.","PeriodicalId":100849,"journal":{"name":"Journal of Transportation Systems Engineering and Information Technology","volume":"82 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74956505","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}
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