نتایج جستجو برای: railway track
تعداد نتایج: 76624 فیلتر نتایج به سال:
The study of railway dynamics is still a productive area research given the rapid technological evolution this transport system regarding load and speed. Morocco no exception to rule, especially after commissioning first high-speed line in Africa. This describes herein an experiment measure vertical transverse accelerations locomotive on railroad connecting two cities Mchraa Ben Abbou Marrakech...
BACKGROUND Little is known about train suicide and factors influencing its prevalence. This study tests the hypotheses that railway density, railway transportation volume, familiarity with railway transportation and population density contribute to train suicide. It also tests the relationship between train suicide and general population suicide and examines the prevalence and the characteristi...
This paper outlines the historical development of the wheel and rail profiles currently used on railway vehicles. It also presents the key damage mechanisms involved in wheel-rail contact and summarises the methods that have recently been developed by railway engineers to predict the level of wheel and rail damage from these mechanisms. Tools for predicting the key damage modes of wear and roll...
The most common types of rail defects on modern railway lines occur due to the rolling contact fatigue steel. One methods slow down development these is application new steel grades with increased hardness in curves larger radii and other characteristic track sections. Serbian standard SRPS EN 13674-1:2017 - Railway applications Track Rails Part 1: Vignole rails 46 kg/m above comprises nine per...
This paper presents a methodology to build representative railway track geometries thanks to a stochastic modelling. This modelling, which has to integrate the statistical and spatial variabilities and dependencies, is a key issue when using simulation for conception, maintenance or certification purposes, as the dynamic behaviour of the trains is mainly induced by the track geometry. The stoch...
Analysing track geometry defects is critical for safe and effective railway transportation. Rectifying the appropriate number, types and combinations of geo-defects can effectively reduce the probability of derailments. In this paper, we propose an analytical framework to assist geo-defect rectification decision making. Our major contributions lie in formulating and integrating the following th...
Checking railway sratus is critical to guarantee high operating safety, proper maintenance schedule, IOW maintenance and oprsrating costs. This (operation consists of the analysis of the rail profile and level as well as overall geometry and ondulation. Traditional detection systems are based on mechanical devices in contact with the track. Innovative approaches are based on laser scanning and ...
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