2 edition of Stability of rapid transit train against overturning in a crosswind. found in the catalog.
Stability of rapid transit train against overturning in a crosswind.
Ernest G. Chilton
|Statement||Prepared for Bay Area Rapid Transit District, San Francisco, California by E. G. Chilton [and] T. D. Witherly. SRI project no. P-4578.|
|Contributions||Witherly, T. D.|
|The Physical Object|
|Pagination||xiv, 69 p.|
|Number of Pages||69|
mode split for journeys to work in downtown San Francisco was 54 percent transit, 30 percent drive alone, and 16 percent ride share.2 San Francisco-originating work trips had the highest transit mode share (61 percent transit) of all Bay Area residence regions. Commuters from the East Bay were next with a 55 percent transit mode share. Train model on viaduct. Figure 7: EMUV on flat ground. Figure 8: Dynamic test (ETR): tunnel exit. As an example, the influence of the scenario (flat ground and embankment) is analysed in Figure 9 for the ETR train. The overturning moment coefficient is shown as a function of the yaw angle α.
Further Improvement of Railway Safety Against Cross Wind Dr. Katsuhiro Kikuchi Laboratory Head Vehicle Aerodynamics A mock-up of train consisted of three vehicles is installed on an eight-meter viaduct of single track to measure acting force due to natural wind. This site, Shimamaki village, Hokkaido, is known as an area of strong wind. Mass transit rail agencies use TransCore systems for automatic train positioning, condition-based monitoring, and fault detection. Reliable, accurate data reduces operating costs and improves passenger safety. Teito Rapid Transit Authority - Tokyo, Hiroshima, Nagasaki - Japan Singapore Mass Rapid Transit (North, South, East, West Lines.
Ballast Railroad Design: SMART-UOW Approach - CRC Press Book The rail network plays an essential role in transport infrastructure worldwide. A ballasted track is commonly used for several reasons, including economic considerations, load bearing capacity, rapid drainage and ease of . Train Aerodynamics: Fundamentals and Applications is the first reference to provide a comprehensive overview of train aerodynamics with full scale data results. With the most up-to-date information on recent advances and the possibilities of improvement in railway facilities, this book will benefit railway engineers, train operators, train.
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Get this from a library. Stability of rapid transit train against overturning in a crosswind. [Ernest G Chilton; T D Witherly]. Lateral Stability of High-Speed Trains at Unsteady Crosswind 2 Lateral rail vehicle dynamics Fundamentals A rail vehicle often consists of a carbody supported by two running gears, and high-speed rail vehicles are designed as bogie vehicles.
Figure shows schematically. The crosswind stability against overturning is a major national design criterium for high-speed railway vehicles. Due to the increasing interoperability in Europe it.
Crosswind stability of a high-speed train on a high embankment Article in Proceedings of the Institution of Mechanical Engineers Part F Journal of Rail.
The crosswind stability against overturning is a major design criterium for high speed railway vehicles. Due to the increasing interoperability in Europe it has also become an important international task.
In recent years efforts have been made to derive an uniform rule in certifying railway by: 1. Abstract. This paper describes the methodology for safety assessment related to the risk of a train overturning in strong cross-winds. As an example, this methodology is applied on the high-speed line Botniabanan being built for a maximum speed of km/h in the northeast coastal region of by: Keywords: Train aerodynamics, crosswind stability, train overturning, CFD, wind tunnel testing, ICE 2, Aerodynamic train model 1 INTRODUCTION The understanding of crosswind stability for rail cars has matured considerably in the rail-way community during the last decade.
This is partly thanks to the work with the EuropeanFile Size: KB. Assessment of train-overturning risk due to strong cross-winds E Andersson, J Häggström, M Sima, and S Stichel Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 3, Cited by: E.
Andersson, J. Häggström, M. Sima and S. Stichel, Assessment of train-overturning risk due to strong cross winds, Journal of Rail and Rapid Transit, (3) () – CrossRef Google ScholarCited by: 3. Introduction.
The crosswind stability copes with the safety of vehicles driving in strong crosswinds. The term stability refers to the fact that the most common accident which is induced by wind is overturning, the risk of derailment or other failures being almost negligible.
In the last years this topic has gained large attention by research and by: In the design of a rapid transit system, it is necessary to balance the average speed of a train against the distance between stops.
The more stops there are, the slower the train's average speed. To get an idea of this problem, calculate the time it takes a train to make a km trip in two situations.
(Assume that at each station the train accelerates at a rate of. IMPROVED METHODOLOGIES FOR THE ANALYSIS OF THE Over the last years, the analysis of the crosswind stability of railway vehicles has established its position in the research community. However, the topic is still conﬂicting because of the the probability of failure (i.e.
of overturning) for the time interval (0,T).File Size: KB. Keywords: crosswind stability, railway vehicles, driving dynamics, reliability analysis Nowadays, crosswind stability is a key topic for the homologation of railway vehicles and thus a pivotal boundary condition in their design process.
In many countries, including Germany, the safety proof is based on the numerical simulation of the driving Cited by: The DLR research project Next Generation Train deals with concepts, methods and technologies for a very high-speed train in double deck configuration and light-weight design.
Due to these three key features crosswind stability is a particular subject of study. It is shown that conventional approaches here fall short of guaranteeing. Considering high speed train applications (train speed higher than km/h), the interesting wind-train yaw angles are confined in a range between 0 and 30 deg (if cross wind speed higher than 25 m/s is taken into account).
For still model tests the File Size: KB. 0 (0) Lee & McGill recently published “Effect of Long-Term Isometric Training on Core/Torso Stiffness” in the Journal of Strength and Conditioning Research. (1) These findings should influence our decision making process when treating patients for “core weakness”.
Although core weakness is often sub-clinical, it is a precursor to many orthopedic conditions. The driving stability of a passenger car at high-speed and under crosswind conditions is affected by aerodynamic characteristics as well as their dynamic characteristics, suspension, and weight distribution.
In this study, the total measuring system was thought up to understand the transient vehicle dynamics and aerodynamics with driver’s control inputs all Cited by: The project will help to allevi- ate the severe highway and rapid transit congestion in this area, as well as address the currently inequitable distribution of commuter rail service.
The project involves the reconstruction of existing, largely out-of-service railroad right-of-way as a single-track railroad with four controlled passing sidings.
for Bus Rapid Transit systems: The case of Metrobus, Mexico city Erin Francke, Jorge Macías and Georg Schmid Abstract Based on the case study of Metrobus, a Bus Rapid Transportation system in Mexico City, the current paper analyses how private investment can be mobilised towards low-carbon, climate-resilient File Size: 1MB.
PETERSBURG — Proponents of a bus rapid transit system that would connect St. Petersburg, Tampa and Wesley Chapel pushed back Friday against recent criticism of. 1. Introduction. When high speed trains are exposed to extreme weather conditions such as intense lateral winds, storms and tornadoes, lateral loads acting on the train can cause overturning of the train (Sanquer et al., ).Any increase in the speed of the train and any reduction in its weight also increases the possibility for the occurrence of such events (Rezvani Cited by: 2.to ensure track stability under dynamic loads, the magnitude to which longitudinal thermal stresses develop is controlled by the choice of an appropriate Design Neutral Temperature (DNT).
The longitudinal movement of rail, referred to as creep, causes a deviation of the rails’ neutral temperature (RNT) from that of the DNT.With the continuously increased running speed of high-speed trains, aerodynamic problems become more and more obvious. Running safety of trains under crosswinds is a serious problem among numerous aerodynamic problems.
Aiming at this problem, this paper combines computational fluid dynamics with multi-body dynamics to study aerodynamic characteristics Author: Hong Wu, Zhi-jian Zhou.