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The method of determining design assumptions for bogie platform 确定转向架平台设计假设的方法
Rail Vehicles/Pojazdy Szynowe Pub Date : 2024-07-09 DOI: 10.53502/rail-190356
Witold Jerzy Kapelański, Laura Mielcarek
{"title":"The method of determining design assumptions for bogie platform","authors":"Witold Jerzy Kapelański, Laura Mielcarek","doi":"10.53502/rail-190356","DOIUrl":"https://doi.org/10.53502/rail-190356","url":null,"abstract":"This article is devoted to the methods of designing running gear in compliance with recently changed requirements, regulations of rail authorities, technical specification for interoperability, and safety certification. Changes are focused on the certification process. According to ERA these changes are recommended for bogies holding IC certificate issued according to the former TSI WAG, without assessment of the strength of the bogie frame. \u0000The presented methods allow designing a bogie platform with a wide range of applications in regional, and long-distance trains. Issues related to calculations, and studies of bogie frames are described. Particular attention is paid to methods for determining loads applied to the bogie frame based on assumed axle loads, determining reference forces for the projected shock absorbers, and compiling computational cases for strength analysis of traction units.","PeriodicalId":147282,"journal":{"name":"Rail Vehicles/Pojazdy Szynowe","volume":"105 42","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141666242","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
Concept for an innovative screw coupling system production process 螺纹联接系统创新生产工艺概念
Rail Vehicles/Pojazdy Szynowe Pub Date : 2024-05-04 DOI: 10.53502/rail-188072
Samuel Szulc, T. Nowakowski, F. Tomaszewski, Mateusz Motyl, P. Komorski, S. Finke
{"title":"Concept for an innovative screw coupling system production process","authors":"Samuel Szulc, T. Nowakowski, F. Tomaszewski, Mateusz Motyl, P. Komorski, S. Finke","doi":"10.53502/rail-188072","DOIUrl":"https://doi.org/10.53502/rail-188072","url":null,"abstract":"The article presents the concept of an innovative approach to the production of a screw coupling system, a key element in rail vehicles. The use of ready-made components from various subsuppliers, combined with new quality control methods, offers an opportunity for a significant reduction in cost and production time while increasing the efficiency and flexibility of the process. Key stages of the production process are highlighted, from the selection of semifinished products, through quality control, to the final assembly and validation. The applied strategies can minimise waste, increase material efficiency, and have a positive impact on the environment. This study constitutes a significant contribution to the development of sustainable production in the railway industry, with an emphasis on organisational, process, and product innovations.","PeriodicalId":147282,"journal":{"name":"Rail Vehicles/Pojazdy Szynowe","volume":"70 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141013778","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
Model of energy consumption by brake discs of rail vehicles 轨道车辆制动盘能耗模型
Rail Vehicles/Pojazdy Szynowe Pub Date : 2024-04-15 DOI: 10.53502/rail-186984
W. Sawczuk, M. Jüngst, Daniel Kaczmarek
{"title":"Model of energy consumption by brake discs of rail vehicles","authors":"W. Sawczuk, M. Jüngst, Daniel Kaczmarek","doi":"10.53502/rail-186984","DOIUrl":"https://doi.org/10.53502/rail-186984","url":null,"abstract":"The aim of the article is to present a computational model to determine the losses generated by the brake discs of rail vehicles. The energy consumption of the disc (energy losses) is divided into inertia losses and fan losses. The article is preceded by a review of the design solutions of brake discs of rail vehicles in terms of their ventilation and cooling after braking. Particular attention was paid to three types of brake disc designs with ventilation blades, bars and other shapes of ventilation bridges, and how the ventilation of these discs affects energy losses. On the one hand, forced ventilation of brake discs shortens the cooling time after intensive braking, on the other hand, it causes energy losses due to forced ventilation when the brakes are not used. The article presents the state of knowledge regarding the cooling efficiency of brake discs as a result of forced ventilation and presents a method for calculating the energy consumption generated by the brake disc in relation to the rotational speed. The energy losses were divided in the article into inertia losses due to the rotating mass and losses on the fan, in which the energy necessary for the rotation of the brake disc was determined from the method of calculating centrifugal fans with known geometric dimensions.","PeriodicalId":147282,"journal":{"name":"Rail Vehicles/Pojazdy Szynowe","volume":"7 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140702578","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: 1
Simulation analysis of a gas engine with various prechamber neck diameters in lean burning condition 贫燃状态下不同前腔颈直径燃气发动机的模拟分析
Rail Vehicles/Pojazdy Szynowe Pub Date : 2024-03-21 DOI: 10.53502/rail-183642
F. Szwajca, K. Skobiej, Kamil Wittek
{"title":"Simulation analysis of a gas engine with various prechamber neck diameters in lean burning condition","authors":"F. Szwajca, K. Skobiej, Kamil Wittek","doi":"10.53502/rail-183642","DOIUrl":"https://doi.org/10.53502/rail-183642","url":null,"abstract":"The research presented in this paper focused on the simulation analysis of the pre-chamber neck diameter on in-cylinder processes in a large gas engine. The investigation was conducted using AVL Boost software and the implemented PCSI combustion model. The scope of the analysis included different neck diameters from 17 to 26 mm and variations of the ignition timing in the range of 0 to 40 degrees. Using the narrowest ignition chamber neck resulted in the largest inter-chamber throttling effect. This translated into an increase in the maximum pressure in the cylinder, obtaining more heat release and the heat release rate. Further reduction of the constriction below 17 mm led to a rapid pressure increase in the ignition chamber at the start of combustion above the maximum pressure in the cylinder, for which the indicated constriction value was considered limiting.","PeriodicalId":147282,"journal":{"name":"Rail Vehicles/Pojazdy Szynowe","volume":"158 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140222649","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
Energy efficiency in rail vehicles: analysis of contemporary technologies in reducing energy consumption 铁路车辆的能源效率：降低能耗的现代技术分析
Rail Vehicles/Pojazdy Szynowe Pub Date : 2023-12-28 DOI: 10.53502/rail-177660
K. Skobiej
{"title":"Energy efficiency in rail vehicles: analysis of contemporary technologies in reducing energy consumption","authors":"K. Skobiej","doi":"10.53502/rail-177660","DOIUrl":"https://doi.org/10.53502/rail-177660","url":null,"abstract":"The article focuses on the problem of energy intensity in rail vehicles and analyzes current technologies aimed at reducing it. The author discusses innovations and strategies aimed at increasing energy efficiency in rail transportation. He also outlines the challenges of reducing energy consumption in this sector and future development prospects. The main focus of the article is on the problem of energy demand in rail vehicles, with a special emphasis on railroads. The author analyzes the current challenges of high energy consumption in rail transportation and presents various technologies that have been introduced to minimize this consumption. The article includes descriptions of technological innovations such as advanced energy management systems, efficient braking systems that recover energy, and the use of low aerodynamic drag materials. The author also discusses strategies to improve the energy efficiency of rail vehicles, including both existing ones and those planned for market introduction. One of the key points of the article is also a presentation of the challenges of reducing energy consumption in the rail sector. These include the need to adapt existing infrastructure, the financial aspects of introducing new technologies, and acceptance by consumers and operators, among others.","PeriodicalId":147282,"journal":{"name":"Rail Vehicles/Pojazdy Szynowe","volume":"30 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139151581","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
Concept of hazard identification for RAMS specification RAMS 规范的危险识别概念
Rail Vehicles/Pojazdy Szynowe Pub Date : 2023-12-28 DOI: 10.53502/rail-177619
Maciej Krzysztof Nowicki, Adrian Gill
{"title":"Concept of hazard identification for RAMS specification","authors":"Maciej Krzysztof Nowicki, Adrian Gill","doi":"10.53502/rail-177619","DOIUrl":"https://doi.org/10.53502/rail-177619","url":null,"abstract":"In parallel with the dynamic development of rail transport in terms of vehicle design, control systems, infrastructure issues, the development of processes and procedures in the area of safety management must also progress. This growing awareness was confirmed, among other things, by harmonising the content of the regulations on railway safety and interoperability, the safety certification of railway undertakings and the definition of the tasks and roles of national safety authorities. In effect, this was to enable the development of a single European railway area. An implementation tool that allows for a systematic approach to safety management processes and that enables the above requirements to be met is, among other things, RAMS analyses. A key step in the safety management process for specifying RAMS is hazard identification, which is particularly highlighted in PN EN 50126-2:2018 through the holistic model for risk assessment and control of railway system hazards (hourglass model). It places the hazard identification process in two stages, i.e. in the early development stage of the analysis (similar to other known risk management models) and in the hazard control stage. This positioning alone indicates the importance of the hazard identification process. On the comprehensiveness and detail of its implementation depends the validity of the final outcome of the RAMS analysis. The development of such a process for real technical facilities in a way that is consistent with the needs of RAMS analyses and, at the same time, ensures that satisfactory results of these analyses are achieved, has become the subject of this article.","PeriodicalId":147282,"journal":{"name":"Rail Vehicles/Pojazdy Szynowe","volume":"348 16‐17","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139148902","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
Modeling the accessibility of public transport to people with disabilities in the GTFS standard 在 GTFS 标准中模拟公共交通对残疾人的无障碍性
Rail Vehicles/Pojazdy Szynowe Pub Date : 2023-12-06 DOI: 10.53502/rail-176332
P. Zmuda-Trzebiatowski, Karolina Bar, Maciej Bieńczak, Waldemar Walerjańczyk
{"title":"Modeling the accessibility of public transport to people with disabilities in the GTFS standard","authors":"P. Zmuda-Trzebiatowski, Karolina Bar, Maciej Bieńczak, Waldemar Walerjańczyk","doi":"10.53502/rail-176332","DOIUrl":"https://doi.org/10.53502/rail-176332","url":null,"abstract":"In this paper, the possibility of using the GTFS standard to describe the public transport (PT) stop infrastructure in Poland, was evaluated. It was also proposed to expand the existing GTFS file of the ZTM (PT authority) in Poznań to include a detailed description of a selected two-level tram stop. A testbed equipped with open source software was built and used for this purpose. The study showed that despite the fact that in Poland, PT organizers and operators do not provide detailed information on its accessibility to people with disabilities, the preparation of such information is possible, while modifications to the data generated so far may be required, especially regarding the stops. However, the preparation and updating of this data on a nationwide scale may pose a problem.","PeriodicalId":147282,"journal":{"name":"Rail Vehicles/Pojazdy Szynowe","volume":"41 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138597006","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: 1
Integration of capacitors with carbon - lignin based electrodes in rail vehicles for enhanced energy efficiency 在铁路车辆中集成基于碳-木质素电极的电容器，以提高能源效率
Rail Vehicles/Pojazdy Szynowe Pub Date : 2023-12-02 DOI: 10.53502/rail-176155
Beata Kurc, Krystian Woźniak, Łukasz Rymaniak, Natalia Szymlet
{"title":"Integration of capacitors with carbon - lignin based electrodes in rail vehicles for enhanced energy efficiency","authors":"Beata Kurc, Krystian Woźniak, Łukasz Rymaniak, Natalia Szymlet","doi":"10.53502/rail-176155","DOIUrl":"https://doi.org/10.53502/rail-176155","url":null,"abstract":"The article presents considerations regarding the possibility of recovering braking energy of a rail vehicle. The energy parameters obtained during acceleration and braking of the loaded bus were taken as input data. It was found that over 13 kWh of energy was lost irretrievably in the braking resistors. Due to the speed of the discussed process, capacitors with an original design were proposed for energy recovery. For the purposes of this study, electrodes were fabricated using carbon derived from lignin carbonization at two distinct temperatures: 900°C and 1000°C. Based on the electrochemical tests carried out, it was found that the second proposed solution achieves a significantly better power-to-weight ratio – 13 kW/kg.","PeriodicalId":147282,"journal":{"name":"Rail Vehicles/Pojazdy Szynowe","volume":"125 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138606837","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
Numerical investigation on the effects of fueling the Turbulent Jet Ignition gas engine with methane and hydrogen 关于用甲烷和氢气为湍流喷射点火燃气发动机提供燃料的影响的数值研究
Rail Vehicles/Pojazdy Szynowe Pub Date : 2023-11-30 DOI: 10.53502/rail-176126
I. Pielecha, F. Szwajca, K. Skobiej
{"title":"Numerical investigation on the effects of fueling the Turbulent Jet Ignition gas engine with methane and hydrogen","authors":"I. Pielecha, F. Szwajca, K. Skobiej","doi":"10.53502/rail-176126","DOIUrl":"https://doi.org/10.53502/rail-176126","url":null,"abstract":"The modern solution of two-stage combustion, namely the Turbulent Jet Ignition (TJI), enables the combustion of ultra-lean mixtures. Thanks to this solution, it became possible to reduce fuel consumption and, at the same time, to increase the combustion process indicators (including the overall combustion system efficiency). The article presents the results of numerical tests of a heavy-duty engine equipped with the TJI system running on gas fuels. The AVL BOOST software was used to analyze the effects of different fuel injection rates into the pre-chamber and various ignition timing angles, while maintaining a constant global excess air ratio. Increasing the proportion of hydrogen in the pre-chamber resulted in its reduction in the main chamber (the fuel dose was kept constant with different excess air coefficients in each of the chambers). The maximum combustion pressure values in both chambers were investigated. Changes in the amount of heat released and its release rate were determined. As a result of the simulations, different ignition and combustion conditions were presented for the tested fuels. Based on this, maps of fuel dose to prechamber vs. ignition advance angle were drawn up, showing selected thermodynamic indicators of the combustion process.","PeriodicalId":147282,"journal":{"name":"Rail Vehicles/Pojazdy Szynowe","volume":"127 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139197235","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
Reducing wheel wear of a motorised metro car on a curved track with a small curve radius 减少电动地铁车辆在小半径曲线轨道上的车轮磨损
Rail Vehicles/Pojazdy Szynowe Pub Date : 2023-11-30 DOI: 10.53502/rail-175921
J. Matej, P. Orliński
{"title":"Reducing wheel wear of a motorised metro car on a curved track with a small curve radius","authors":"J. Matej, P. Orliński","doi":"10.53502/rail-175921","DOIUrl":"https://doi.org/10.53502/rail-175921","url":null,"abstract":"A structural solution was proposed to enable passive control of the wheelsets of a motorised metro car on curved track with a small curve radius. This effect was achieved by varying the stiffness of the guidance of the wheelsets in the horizontal plane of the frame of each bogie on which the wagon body rests. This ensured the required critical speed of the metro wagon when moving on straight track, and allowed for reduced mechanical wheel wear and better steering of the bogies when moving on curved track with a small radius of curvature. Parameters specific to the design of modern metro cars were taken into account. Current knowledge of non-linear lateral dynamics of rail vehicles and the specialist computer programme Vi-Rail were used to perform the calculations involving simulation models.","PeriodicalId":147282,"journal":{"name":"Rail Vehicles/Pojazdy Szynowe","volume":"465 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139203159","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
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