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2022
The vehicle–track interaction and the resulting dynamic response of the vehicle involve a number of complex wenonlinear problems. Large vertical loads act through a small contact patch leading to very high contact pressures. Transverse loads acting through this contact induce a relative velocity between wheel and rail expressed in non-dimensional form ...
Thompson, David, Squicciarini, Giacomo
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The vehicle–track interaction and the resulting dynamic response of the vehicle involve a number of complex wenonlinear problems. Large vertical loads act through a small contact patch leading to very high contact pressures. Transverse loads acting through this contact induce a relative velocity between wheel and rail expressed in non-dimensional form ...
Thompson, David, Squicciarini, Giacomo
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Hardening of Rail Vehicle Axles
Solid State Phenomena, 2022The development of the technology for laser hardening of the axle seats of rail vehicles aims to improve the high-cycle service life of these axles under wheel pressing and thus to increase safety in rail transport. Laser hardening can create high compressive stresses that increase the fatigue resistance of the material.
Stanislav Němeček +5 more
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Parametric Excitation of Rail Vehicles
Vehicle System Dynamics, 1988SUMMARY This paper explores the parametrically excited behavior of U.S. passenger and freight vehicles on tangent track due to harmonic variations in conicity. Floquet theory is used to find the stability boundaries of these vehicles. Results show that principal parametric resonance occurs at excitation wavelengths that are half the kinematic ...
I. Haque, J. Lieh
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Lateral Oscillations of Rail Vehicles
Journal of Fluids Engineering, 1935Abstract The authors point out in this paper that lateral oscillations, which either do not occur or are negligible at slow train speeds, are of vital importance at the high train speeds now demanded by the railroads in order for them to compete successfully with the swiftly moving automobile and the much swifter airplane.
B. F. Langer, J. P. Shamberger
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Light rail vehicles and running safety
ASME/IEEE Joint Railroad Conference, 2002The basic standard US LRV structural designs are virtually unchanged from those adopted 25 years ago based on a modified European subway car. With only one exception, these have not been significantly updated for or adapted to the high levels of in-street running found more and more on new light rail systems or for increased passenger safety in general.
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Rail Vehicle Dynamic Parameter Identification
Rail Transportation, 1997Abstract A cost-effective method of experimentally determining rail vehicle dynamic parameters for use in analytical dynamic models has been developed by the Association of American Railroads (AAR). In this method, the rail vehicle’s rigid body modes of vibration are manually excited and the corresponding resonant frequencies are ...
N. G. Wilson, C. L. Urban, M. S. Burnett
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Rail Vehicle Qualification Test Compendium
2015Qualification and acceptance testing and analysis for new passenger rail vehicles for transit systems has been specified by the transit/commuter agency for which the cars will be supplied to and/or by government agencies. Regulatory testing defined by the Federal Railroad Administration (FRA) is currently only for passenger vehicles operating at 90 mph
Jones, MaryClara +2 more
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Inductive power supply for heavy rail vehicles
2013 3rd International Electric Drives Production Conference (EDPC), 2013Electrical railway systems are characterized by the energy transfer from fixed installations of the railway energy supply source to the mobile consumers. Today's conventional versions are always characterized by contact-based energy transfer. In the following, the initial approach for a energy transfercontactless energy transfer for standard gauge ...
Winter, Joachim +5 more
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Application of Composites in Rail Vehicles
2016This paper reviews components of rail vehicles in which composite materials have been employed successfully to date and those in which they are most likely to be exploited in the near future. Specific references are made to some of today's rail vehicles in which composites are employed routinely for the fabrication of complex three-dimensional moulded ...
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Ultrasonic vehicle-based rail inspection
Insight - Non-Destructive Testing and Condition Monitoring, 2004Network Rail is working closely with Sperry and First Engineering in trials of a new road rail vehicle that inspects the rail using Sperry ultrasonic track inspection technology, checking for defects and future potential problems. This new machine - the UTU 5 - is said to be much faster, more efficient and more reliable than conventional manual ...
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