Optical monitoring of highly stressed infrastructure and rolling stock modules for railway system operation

2004 ◽  
Author(s):  
Nils M. Theune ◽  
Thomas Bosselmann ◽  
Michael Willsch ◽  
J. Kaiser ◽  
H. Hertsch ◽  
...  
Keyword(s):  
Rolling Stock ◽  
Optical Monitoring ◽  
System Operation ◽  
Railway System

scholarly journals Influence of Embankments With Parapets on the Cross-Wind Turbulence Intensity at the Contact Wire of Railway Overheads

2010 ◽  
Author(s):  
Sergio Avila-Sanchez ◽  
Oscar Lopez-Garcia ◽  
Jose Meseguer
Keyword(s):  
Wind Tunnel ◽  
Environmental Factor ◽  
Turbulence Intensity ◽  
Experimental Analysis ◽  
System Operation ◽  
Contact Wire ◽  
Aerodynamic Loads ◽  
Essential Parameter ◽  
Railway System ◽  
Undamped Oscillations

Winds as an environmental factor can cause significant difficulties for the railway system operation. The railway overhead has been particularly vulnerable to cross-winds related problems, such as development of undamped oscillations due to galloping phenomenon. The installation of windbreaks to decrease the aerodynamic loads on the train can affect the loads on railway overheads triggering cable galloping. One essential parameter to indicate the influence of the parapet wake on the catenary contact wire is the turbulence intensity. In this paper the results of an experimental analysis of the turbulence intensity due to the presence of parapets carried out in a wind tunnel are reported. Embankments equipped with different parapets have been tested and turbulence intensity has been measured at both contact wire locations, windward and leeward. The relative influence of the parapets is measured through a reduced turbulence intensity, defined as the ratio between the turbulence intensity measured with parapet and the turbulence intensity in the case without any parapet on the embankment. In general the reduced turbulence intensity increases as the height of the parapet increases.

TOTAL PRODUCTIVE MAINTENANCE IN THE RAILWAY SYSTEM

2015 ◽  
Vol 76 (6) ◽  
Author(s):  
Eliane da Silva Christo ◽  
Leandro Paixão Petruccelli ◽  
Kelly Alonso Costa
Keyword(s):  
Metropolitan Region ◽  
Rolling Stock ◽  
Total Productive Maintenance ◽  
Railway Systems ◽  
Production Improvement ◽  
History Of ◽  
Railway System

This study aims to evaluate the need for a change in the maintenance philosophy used for the permanent route of the railway concession that provides the service for rail passengers in a metropolitan region. It also examines the need for production improvement, due to the requirement for a change in the rolling stock. The technique of total productive maintenance and its indicators are applied to evaluate the procedure for replacement of sleepers in narrow gauge lines. The history of the railway in Brazil is also presented, together with citations on the components of railway systems, the permanent way and a case study showing the strategy chosen in order to reduce the time for improvements by more than 10%.

scholarly journals Pedestrian Patterns at Railway Platforms during Boarding: Evidence from a Case Study in Switzerland

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Giulia Dell’Asin ◽  
Johannes Hool
Keyword(s):  
Hot Spots ◽  
System Performance ◽  
Important Determinant ◽  
Methodological Approach ◽  
Growth Curves ◽  
Longitudinal Direction ◽  
Rolling Stock ◽  
Passenger Flow ◽  
Railway System

The boarding/alighting process at railway platforms is an important determinant of the railway system performance and depends on the characteristics of passengers, the layout of the platform, and the rolling stock. This research aims to increase the understanding of the process, providing a methodological approach to model the passengers’ behaviour when boarding at railway platforms. Adequate criteria were selected to define the so called “boarding cluster” and an easy mechanism was developed to select the boarding clusters. Passenger flow data collected at Bern railway station in Switzerland was used to test the proposed approach. The results show that (a) the clusters near the doors grow in the longitudinal direction with a rate of 6:1 between the length and width of clusters, and that (b) the growth curves rise quickly when clusters are still small, i.e., at the beginning of the boarding/alighting activity. Further research is needed to extend the validation of the model, considering other variables, such as critical pedestrian densities which occur at specific hot spots near obstacles at platforms.

RDSP: A Railway Decision Support Platform for Integrating and Bridging Existed Legacy Systems

2013 ◽  
Author(s):  
I-Chang Chen ◽  
Shu-Keng Hsu ◽  
Teh-Juan Wu ◽  
Li-Hsien Yen ◽  
Yusin Lee ◽  
...  
Keyword(s):  
Information System ◽  
Decision Support ◽  
Traffic Control ◽  
Legacy Systems ◽  
System Operation ◽  
Enterprise Information System ◽  
Enterprise Information ◽  
External Data ◽  
Historical Factors ◽  
Railway System

Railway system operation is a very complicated task and must be supported by the coordination of several systems including engineering, transportation, locomotive maintenance and management, ticket system and passengers service, etc. Ideally, a modern railway enterprise information system should be an integrated, consisted, and site-opened database to support railway system operation. However, multiple isolated applications instead of one integrated enterprise information system are often formed due to historical factors such as independent departments, budgetary constraint and application requirements diversification. Take Taiwan Railways Administration (TRA) as an example, four major departments have their own support systems and databases that store critical planning and operational data. Those systems are isolated and can hardly communicate with each other. As a result, most cross-systems information analyses or data reference for decision making are done manually, which significantly affect the organizational efficiency of TRA. To address the aforementioned issues, a railway decision support platform (RDSP) for integrating the legacy systems (databases) is proposed in this paper. RDSP is designed to be a railway enterprise information system that supports the critical functions of data warehouse and decision support. Furthermore, RDSP is built by integrating the existing legacy systems rather than by building it from scratch. A data bridging system (HDBS) including four modules are design and implemented, input module for connecting the external data sources, output module for exporting integrated report or dumping data by predefined criteria for other systems, configuration module with a web-based user interface for setting up the periodic operations of data input or output tasks, and DB connection module for connecting external databases. Various types of railway system data are designed in RDSP schema and collected, including facilities, timetable, train services records, tickets, centralized traffic control (CTC) system records, and automatic train protection (ATP) system records. RDSP provides a system framework to integrate many isolated island-style databases that currently exist in TRA, and can form a cross-enterprise database that serves as the primary and only data platform. To demonstrate the efficacy of the RDSP, a spatiotemporal ticket-selling analysis report, a train delay cause analysis report, and a timetable planning software (TrainWorld) are designed on top of it. In the future, RDSP will play a major supportive role in infrastructure maintenance, operations, decision support, and planning.

Paper 10: Design of Railway Rolling Stock for Heavy Urban Service

1969 ◽  
Vol 184 (19) ◽  
pp. 99-121
Author(s):  
S. A. Driver
Keyword(s):  
Urban Areas ◽  
Reverse Flow ◽  
Rolling Stock ◽  
Rail Network ◽  
Number Of Factors ◽  
Large Numbers ◽  
Urban Service ◽  
Subway System ◽  
Railway System ◽  
Working Day

With a total fleet of 4250 railway cars, London Transport convey over 2 220 000 passengers each working day on a rail network of 236 route miles. More than half a million passengers alight at central London stations between 7 a.m. and 10 a.m., and the reverse flow takes place between 4.30 p.m. and 7 p.m. This concentrated demand presents a major problem. It can be shown than an electrified railway system can provide the most efficient and reliable means of rapidly conveying large numbers of people in dense urban areas. Various figures have been published and from these it can be demonstrated that a modern subway system can give a passenger-carrying capacity, under tolerable loading conditions, of between 25 000 and 30 000 per hour in each direction, or equivalent to 10 or 12 lanes of motorway in each direction. The actual capacity, however, will depend on a number of factors, many of which are dictated by the amount of foresight displayed by the original planners and contruction engineers of the line.

scholarly journals The Problem of Train Scheduling in the Context of the Load on the Power Supply Infrastructure. A Case Study

Energies ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4781
Author(s):  
Szymon Haładyn
Keyword(s):  
Power Supply ◽  
Power Supply System ◽  
Load Capacity ◽  
Supply System ◽  
Rolling Stock ◽  
Supply Network ◽  
Railway Line ◽  
System Use ◽  
Railway System

This article deals with the new challenges facing modernising railways in Poland. We look at the problem of the efficiency of the power supply system (3 kV DC) used in the context of the increasing use of electric vehicles, which have a higher demand for electricity than the old type. We present and characterise the power supply system in use, pointing out its weaknesses. We consider a case study. The load of the power supply network generated by the rolling stock used in Poland was examined using a microsimulation. A real train timetable was taken into account on a fragment of one of the most important railway line sections in one of the urban agglomerations. Then the results were compared with the results of a microsimulation in which old units were replaced by new trains. These tests were carried out in several variants. We found critical points in the scheduling of railway system use. Our results indicate that it is becoming increasingly necessary to take into account the permissible load capacity of the supply network in certain traffic situations in the process of timetable construction.

scholarly journals INFLUENCE OF GAUGE WIDTH ON RAIL SIDE WEAR ON TRACK CURVES

2006 ◽  
Vol 12 (3) ◽  
pp. 255-260 ◽  
Author(s):  
Inesa Povilaitienė ◽  
Ipolitas Zenonas Kamaitis ◽  
Igoris Podagėlis
Keyword(s):  
Mathematical Model ◽  
Experimental Research ◽  
Main Property ◽  
Rolling Stock ◽  
Railway Line ◽  
Railway System

The main property of the railway system is infrastructure objects and rolling‐stock. Holding any kind of a property requires huge expenses and renovation investments. Intensive wearing of the rails on the track curves is observed. This problem is always topical in railways. In this article a possibility to decrease wear of rails on curves is analysed. The purpose of the authors’ research was to estimate the influence of rail wearing on the track widening and permissible deviations on curves when radius is less than 650 m. Also, to estimate the possibility to reduce railroad maintenance expenses associated with the change of the worn rails, when gauge on curves with radius less than 650 m is widened. For this reason in this article a mathematical model is presented. This model evaluates the influence of the gauge width on rail wearing on curves. An experiment was carried out on Lithuanian railway line curves. Results and analysis of the experimental research are presented in the article.

scholarly journals Capital investments in the context of sustainable development of railways

2019 ◽  
Vol 294 ◽  
pp. 04003
Author(s):  
Olesia Kharchenko ◽  
Andrii Okorokov ◽  
Roman Vernigora ◽  
Pavlo Tsuprov ◽  
Oleksandr Papakhov ◽  
...  
Keyword(s):  
Transport Infrastructure ◽  
Rolling Stock ◽  
Capital Investments ◽  
Transit Country ◽  
Transit Traffic ◽  
Railway System ◽  
Geographical Position ◽  
High Level ◽  
In Transit ◽  
Negative Factors

Ukraine, due to its geographical position and developed transport infrastructure, has significant potential as a transit country, primarily in the supply chain of trade between Asia and Europe. According to the estimates of the British Institute for Transport Rendell Ukraine, the transit coefficient of Ukraine is 3,75 (with a maximum of 5); This is the best indicator among the countries of Europe (for comparison, in Poland, which occupies the second place, this indicator is 2,92).Nowadays, Ukraine uses its transit potential extremely insufficiently and inefficiently; over the past 10 years, the volume of transit traffic through the territory of Ukraine has declined by more than 2,5 times, primarily due to the fall in transit traffic by rail. One of the reasons for this situation is, of course, the general political and economic situation in the country. However, there are a number of other negative factors that prevent Ukraine from fully and effectively using its transit potential. These problems lie both in the purely technical plane (deterioration of transport infrastructure and rolling stock, lack of capacity of the main transport routes, underdevelopment of logistics terminals in the country and at land borders, difference in width with the European railway system) and the legislato-thick (high level of port dues, bureaucratization and regulation of customs procedures, lack of flexible tariff policy for carriers, etc.).

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