This study evaluates rail transit benefits based on a comprehensive analysis of transportation system performance in major U.S. cities. It finds that cities with large, wellestablished rail systems have significantly higher per capita transit ridership, lower average per capita vehicle ownership and annual mileage, less traffic congestion, lower traffic death rates, lower consumer expenditures ...

We apply real time physics techniques from video game development to the simulation of rail vehicles for rapid analysis of the stability of the wheel rail interface. We introduce a fast simulation algorithm for the wheel rail interface, using a splinebased approach to approximate the gravitational stiffness force. We compare our simulation to results achieved from solving the Nadal equation for...

This paper focuses on the optimization of initiating dimensions of groove bearing in association with de- sired design of vehicle’s front structure which is made up of low carbon steels in the case of frontal collision. Axial bearing analysis is done numerically using nonlinear finite element code LS-DYNA. In this analysis, changes of two main parameters including measure of energy absorp...

In this paper, analysis for reducing lateral forces is implemented by using a railway vehicle model on a sharp curved track. Also, in order to minimize some problems when a railway vehicle runs on a sharp curved track, an active-steering bogie system is investigated. An active steering bogie system of a railway vehicle is designed to alleviate contact forces and to decrease wear of wheel/rail i...

Wheel profile is a very important factor that helps the steering performance of railway vehicle. However, during operation, wheel tends to vary inconsistently due frictional contact at wheel-rail interface. This paper focuses on problem wheelset and its alteration affects Signal-based indirect estimation technique using Fast Fourier Transform (FFT) proposed establish relationship between dynami...

Ground vibrations near railway lines are generated by the forces that acting between wheel and rail. It seems to be a straight forward assumption vehicle dynamics important for level frequencies of excitation forces. Different phenomena analysed their role in ground vibrations: rigid body modes bogies, elastic (bending) car body, wheelset. The theoretical analyses use models, simplified detaile...

Implementation of highway-rail level crossing warning systems, educational programs and research on crossings have all contributed to a steady reduction in the risk of level crossings to North American highway users over the past several decades. Much less attention has been given to understanding the effect of level crossings on train safety and risk. Incidents at highway-rail level crossings ...

The main topic of this article is the strength analysis selected bogie components – wheelset axle and frame. Axle calculations were based on analytical method conducted with different types materials. finite element was used for verification frame construction loads applied calculated according to PN-EN 13749 norm. a part suspended electric multiple unit which matter authors’ master thesis: „Th...

Curve squeal in railway vehicles is an instability mechanism that arises in tight curves under certain running and environmental conditions. In developing a model the most important elements are the characterisation of friction coupled with an accurate representation of the structural dynamics of the wheel. However, the role played by the dynamics of the rail is not fully understood and it is u...