At typical wheelrail interface in new or newly maintained condition and a wheel profile in worn condition are shown in fig. This article describes the wheelrail interface management wrim model being developed by the transportation technology center, incorporated to evaluate wheelrail interface conditions, plan wheelrail maintenance, and develop strategies to improve railway system performance. The cracking initiation and crack propagation processes that occur in rails as a result of contact between wheels and rails are described. The wheel rail interface was always a troublesome issue for the railway industry, and one that has occupied many learned minds over the years. Third, the wheelrail contact system is an open system, which is affected by various contaminants foreign substances applied both intentionally and unintentionally to the wheelrail interface 2. The probable encouragement for adopting 62ri1 is that wheelrail interface of lowfloor, multisection trams on rigid trucks or at best, almost rigid bogies is more complex than the longproven pcc and its derivatives. Introduction to wheelrail interface research sciencedirect.
Engineering consultancy frazernash is providing safety validation, verifying whether the system can o. Railwheel systems cm2003 in gothenburg, sweden june 10, 2003 submitted to wear journal june 2003 optimal design of wheel profile for railway vehicles i. The application of slab tracn and embedded tracn technology in a railway. Technical specifications for interoperability european railway. Network rail a guide to overhead electrification bath and north. The original profiles often follow some standard or practice, see section 1. On may 8, 2009, the nato army armaments group naag, land capability group 1 dismounted soldier lcg1ds approved the stanag 4694. Rail project management and rail engineering is all we do, thats why we do it well. Pdf creep force estimation at the wheelrail interface. Therefore, the subject of the present article is a geometrical parameter of dual gauge track, i. The understanding of railwheel dynamics is fairly challenging depending on type of rail traffic, infrastructure condition, track type e.
A trip around the 712 gauge miniature railway at roundhouse park toronto looking at the trailing wheels of a bench type passenger car. Therefore, wheelsets move to the direction of smaller diameter wheels in search of a new stable state and to change the condition before entering the turnout. Scribd is the worlds largest social reading and publishing site. However, shortwave irregularities can easily initiate and develop in rail weld due to the limitation of welding technology and thus rail weld has been a main highfrequency excitation and is responsible for deterioration of track components. The focus is on safety improvement, maintenance and.
Wheels on rails an update, understanding and managing the wheel rail interface imeche seminar, london, april 2002 2002 the institution of mechanical engineers 1. A typical contact patch, for standard wheel and rail profiles in new condition and a vertical contact force of 11 tonnes. Prpm05998 199905 aise steel technology may crane wheel and rail interface. Pdf wheel rail interface handbook download full pdf. The modelling code is interfaced with adamsrail, which produces multibody dynamics simulations of a railway wheelset and contact conditions at the wheelrail interface. Lubrication of the wheel flange rail gauge corner interface, commonly referred to as flange or rail. Flange climb derailment criteria and wheelrail profile. Test setup for a prestressed insulated rail joint foreground and a conventional insulated rail joint background. Wheel rail interface handbook free download as pdf file.
Integrating dynamics and wear modelling to predict railway. Better understanding of wheel rail interfaces is therefore. Wheel rail interface rail adhesion from wikipedia, the free encyclopedia. Wheelrail interface handbook woodhead publishing in. Dynamic response of wheelrail interaction at rail weld in. This interaction is a specialist subject covering the design and management of the very high stresses in the small contact area between a steel wheel and steel rail. Ire is a closely knit team of rail specialists and engineers. These turn around times already indicate the interaction between timetable planning. Many of the engineering problems of particular importance to railways arise at interfaces and the safetycritical role of the wheel rail interface is widely acknowledged. Friction management using solid or fluid oil, grease, etc substances at the wheelrail interface is a complex subject and includes. The wheelrail interface is the contact area where wheelrail interaction between wheels and rails in railways takes place. Alejos cutuli pictures courtesy of nato unlesss otherwise stated. Development of the wheelrail interface management model and its application in heavy haul operations.
Ire rail engineering and project management specialists. Rail vision systems visually monitor railwheel interface to make measurements for understanding rail and wheel wear, rcf cracks and corrugation. Derby research was set up very much as a means of getting to understand it and in the 1960s there was a great deal of experimentation to improve this aspect of comfort and safety. Wheel rail interface handbook download ebook pdf, epub. This work should be read in conjunction with rtu report 903a, determination of tramway. Profile wear and machining errors of the wheelset cause deviations of the rolling radius on different wheels.
An optimal interaction between wheels and rails has a very positive effect on maintenance, reliability, energy savings and sustainability. Overhead line equipment or ole is the name railway engineers give to the assembly of masts, gantries and wires found along electrified. Interface problems constitute a serious threat to the management and quality. Maintenance of the wheelrail interface sciencedirect. Ts2015 raildriver interface program this is the main program for the raildriver to communicate with ts2015. Rail wheel interface analysis rail vision europe ltd.
Part 2 see part 1 by jeff tuzik wheelrail interaction impacts virtually every aspect of railroading, including operational safety and efficiency, the effectiveness of vehicle and track maintenance and maintenance planning. Read chapter appendix a effect of wheelrail profiles and wheelrail interaction on system performance and maintenance in transit operations. Wheels on rails an update, understanding and managing the wheelrail interface imeche seminar, london, april 2002 2002 the institution of mechanical engineers 1. When things go wrong, the culprit is often somewhere.
Part one provides the fundamentals of contact mechanics, wear, fatigue and lubrication as well as stateoftheart research and emerging technologies related to the wheel rail interface and its management. Development of the wheelrail interface management model. Interface journal the journal of wheelrail interaction. Abnormal wheel motion patterns can be caused because of poor rail profile or poor track geometry leading. The importance of wheelrail interface management on energy savings and sustainability railroad wheels and rails are made of high strength steel. Considerable benefits can be gained through appropriate wheelrail interface management, including reduced defect rates, improved safety, extended wheel and rail life, improved vehicletrack interaction, reduced wheelrail noise and the development of suitable standards and maintenance procedures. Efficient rail transport can stimulate trade, link production sites to regional and international markets, promote national and crossborder integration and facilitate access to the labor market, education and health services. Part one provides the fundamentals of contact mechanics, wear, fatigue and lubrication as well as stateoftheart research and emerging technologies related to the wheelrail interface and its management. Rail wheel interface rail wheel interface systems focus on understanding the dynamic interaction between the rail wheel and the rail while the vehicle is in motion. With growing commitment to environmentally sustainable transportion solutions, rail is an important element of a low carbon transport strategy, releasing between three. This contact is the critical point at high speeds and in cases of heavy freight trains with high axle load, due to the high contact forces and the dynamics, but it is also responsible for noise emissions and wear figure 44. Interface management on rail infrastructure projects. Friction in wheel rail contacts universiteit twente. Wheel rail profiles and vehicle steering behavior are such that the curve can be considered mild the contact area at each wheel tread low rail interface is approximately circular, with a typical radius of 7mm.
Numerical investigation on wheelturnout rail dynamic. Part one provides the fundamentals of contact mechanics, wear, fatigue and lubrication as well as stateoftheart research and emerging technologies related to. By bob tuzik for three years running, new york city transit and the federal transit administration have kicked off the annual wheelrail interaction rail transit conference with discussion of the nyctfta research project to explore integrated wheelrail analytics on mtanycts no. If you need to print pages from this book, we recommend downloading it as a pdf. Fundamentals of wheelrail interaction international heavy haul. Everyday low prices and free delivery on eligible orders. Cyclic railway timetable optimization repub, erasmus university.
Appendix a effect of wheelrail profiles and wheelrail interaction on system performance and maintenance in transit operations unfortunately, this book cant be printed from the openbook. Wheel rail interface monash institute of railway technology. This work reports a 3d finite element model of wheel. Wheelrail interface handbook is a onestop reference for railway engineering practitioners and academic researchers. Buy wheelrail interface handbook woodhead publishing in mechanical engineering by r. Wheel rail profiles and vehicle steering behavior are such that the curve can be considered mild the contact area at each wheel tread low rail interface is approximately circular. A steel wheel requires very little energy to roll on a steel rail. Vehicle dynamics and the wheelrail interface by jerry evans, aea technology rail simon iwnicki, manchester metropolitan university mmu from. The wheelrail contact determines the capabilities of the railway system. Horizontal and vertical forces generated at the wheelrail interface combine into a resultant force typically, the high rail experiences flange contact but not the low rail figure 7. Wheel rail interface handbook is a onestop reference for railway engineering practitioners and academic researchers.
Understanding the wheelrail interface part two the. Stephen barber professional head of track london underground papers for the seminar will cover. The rail steel can be assumed to have a shear yield strength of k70 ksi. It was proposed that the motions of a railway vehicle in both lateral and yaw directions vary as the adhesion conditions at the wheel rail interface change 1. Hyperconnectivity facilitates the growth of multilateral interaction patterns. Causes of rail cant and controlling cant through wheel. The wheelrail relationship in turnout is more complicated than that in ordinary track. After that standard code is the nato version of what we already know as a rail interface. A good practice guide for managing the wheel rail interface of light rail and tramway systems this guide contains recommendations for best practice in wheel rail interface management to reduce derailment risk over the whole life of the system. Esveld section of road and railway engineering faculty of civil engineering and geosciences, delft university of technology stevinweg 1, nl2628, cn delft. As a main part of continuously welded rail track, rail weld widely exists in highspeed railway. Twin disc testing of rail and wheel materials was carried out to generate wear coefficients for use in the model. These insulated joints provide electrical separation between rails in adjacent block sections. The possible future rail and road status shall be taken into consideration in the barrier selection process to accommodate future requirements.
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