Radiated emissions measurement of entire railway system including rolling stock for Mumbai Monorail project as per EN50121-2: A case study

2015 ◽  
Author(s):  
Milind Y. Joshi ◽  
G. Verma ◽  
R. G. Pawar ◽  
S. M. Dagde ◽  
S. H. Solanki ◽  
...  
Keyword(s):  
Rolling Stock ◽  
Radiated Emissions ◽  
Railway System

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.

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.

A TWO-PHASED FUZZY MULTICRITERIA SELECTION AMONG PUBLIC TRANSPORTATION INVESTMENTS FOR POLICY-MAKING AND RISK GOVERNANCE

2012 ◽  
Vol 20 (supp01) ◽  
pp. 31-48 ◽  
Author(s):  
İHSAN KAYA ◽  
BAŞAR ÖZTAYŞI ◽  
CENGIZ KAHRAMAN
Keyword(s):  
Public Transportation ◽  
Capital Investment ◽  
Transportation Policy ◽  
Rolling Stock ◽  
Risk Governance ◽  
Second Phase ◽  
Transportation Modes ◽  
The Social ◽  
Transportation Type

Public transportation can be viewed as a key determinant and consequence of the social and spatial formation and development of contemporary cities and regions. Transportation policy generally combines four categories of instruments, i.e., investment, pricing, regulation and subsidy, to generate viable alternatives. Capital investment in public transportation supports the purchase of equipment and facilities including rolling stock, tracks, control equipment, and the construction of terminals, stations, parking lots, maintenance facilities and power generating facilities. Risk governance for public transportation investments looks at how risk-related decision-making unfolds when a range of actors is involved, requiring co-ordination and possibly reconciliation between a profusion of roles, perspectives, goals and activities. In this paper, a two-phased multicriteria methodology is proposed to select the best investment alternative for public transportation with respect to the predetermined criteria. In the first phase, a selection among transportation types is made, and in the second phase, a selection among transportation modes of the selected transportation type is made. A case study for Istanbul is given in the application section.

Software-Based Self-Test for Reliable Applications in Railway Systems

2012 ◽  
pp. 198-220 ◽  
Author(s):  
Alfredo Benso ◽  
Stefano Di Carlo ◽  
Alessandro Savino
Keyword(s):  
Test Solution ◽  
Test Coverage ◽  
High Quality ◽  
Basic Principles ◽  
Safety Standards ◽  
Railway Systems ◽  
Railway System ◽  
On Line ◽  
Self Test

The very strict safety standards, which must be guaranteed in a railway system, make the testing of all electronic components a unique and challenging case study. Software-based self-test represents a very attractive test solution to cope with the problem of on-line and off-line testing of microprocessor-based systems. It makes it possible to deeply test hardware components without introducing extra hardware and stressing the system in its operational condition. This chapter overviews the basic principles of software-based self-test techniques, focusing on a set of best practices to be applied in writing, verifying and computing the final test coverage of high-quality test programs for railway systems.

scholarly journals Inductive influence of 25 kV, 50 Hz electrified single rail traction system

2018 ◽  
Vol 180 ◽  
pp. 06004
Author(s):  
Bosko Milesevic ◽  
Ivo Uglesic
Keyword(s):  
Short Circuit ◽  
Short Circuit Current ◽  
Induced Voltage ◽  
Metallic Structures ◽  
Railway System ◽  
Supply Current ◽  
Traction System ◽  
Current Calculation ◽  
Inductive Interference

The paper presents the methodology for calculation and measurement of induced voltage caused by railway system operation on the sensitive metallic structures. The arrangement and characteristics of railway system 25 kV, 50 Hz are provided. The procedures of short-circuit current calculation and supply current measurement in the railway system are described. The basic theoretic background of inductive interference is explained. The reduction factors of the communication cable, railway system and environment are mentioned and clarified. On a case study, the results of the induced voltage calculation and measurement is compared. It is proved that induced voltage directly depends of supply current or shortcircuit value.

PHM for railway system — A case study on the health assessment of the point machines

2012 ◽  
Author(s):  
Hossein Davari Ardakani ◽  
Christina Lucas ◽  
David Siegel ◽  
Shuo Chang ◽  
Pierre Dersin ◽  
...  
Keyword(s):  
Health Assessment ◽  
Railway System

Application of lifecycle assessment to Shinkansen vehicles and cross ties in Japan

2003 ◽  
Vol 217 (4) ◽  
pp. 271-278 ◽  
Author(s):  
H Ueda ◽  
T Miyauchi ◽  
T Tsujimura
Keyword(s):  
Energy Consumption ◽  
Environmental Impact ◽  
Energy Saving ◽  
Global Scale ◽  
Environmental Load ◽  
Lifecycle Assessment ◽  
Useful Knowledge ◽  
Railway System ◽  
Effective Instrument

Recently, environmental protection has become one of the most critical concerns on a global scale. Currently, it is widely recognized that lifecycle assessment (LCA) is a very effective instrument used to evaluate the environmental impact of various products quantitatively across their whole lifecycle. A basic LCA survey of Shinkansen vehicles and cross ties was conducted as a case study for the railway system. Through this study, the following results were confirmed. For any type of vehicle, more than 95 per cent of lifecycle energy consumption (LCE) and lifecycle CO2 emission LCCO2 is attributable to vehicle running. Lightweight vehicles, reduction of running resistance and the use of regenerative brakes contribute to energy saving in vehicle running. Regarding the CO2 emission from four types of ties (wood, concrete, synthetic and steel), wood ties emit the least amount of CO2 and synthetic ties the most. When the effect throughout the lifetime is considered, however, wood ties are by no means insignificant in terms of the environmental load. As a result of this survey, useful knowledge for applying LCA to railways was obtained.

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