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. Safety and economy of railway traffic is enormously influenced by the contact stress variation caused by wheel rail contact profile changes. Complete portfolio from one global source skf and lincoln lubrication systems target the friction and noise occurring at the wheelrail interface of rail vehicles. To study the influence of interacting wheel and rail profile topology of standard rail uic60, the standard wheel profile as per. Chemistry of black leaf films synthesised using rail steels and their influence on the low friction mechanism. This chapter begins with an introduction to the us railroad industry. The detection of critical inherent cracks in the railhead is a major challenge for the railway industry. Wheelrail interface handbook woodhead publishing in. Pdf vehicle dynamics and the wheelrail interface researchgate. Part one provides the fundamentals of contact mechanics, wear, fatigue and lubrication as well as stateoftheart research and emerging technologies related to.
Wheel rail interface handbook top results of your surfing wheel rail interface handbook start download portable document format pdf and ebooks electronic books free online rating news 20162017 is books that can provide inspiration, insight, knowledge to the reader. Pdf wheel rail interface handbook download full pdf book. Sliding wear behavior of selfmated carbidefree bainitic steels. Wear at the wheelrail interface when sanding is used to. Understanding the wheelrail interface part two the. 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.
The outer circumferential surface of the rim, which con. Fundamentals of wheelrail interaction international heavy haul. The wheelrail interface is the contact area where wheelrail interaction between wheels and rails in railways takes place. When things go wrong, the culprit is often somewhere. Flange climb derailment criteria and wheelrail profile. A solid wheel of a railway vehicle hereinafter wheel consists of three parts, as shown in fig. The rail transit seminar is devoted to examining wheel rail and vehicletrack interaction on light rail and subway operations. Everyday low prices and free delivery on eligible orders. 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. Rail transit seminar wheel rail interaction conference. Wheels on rails an update, understanding and managing the wheelrail interface. Olofssoncrc press boca raton boston new york washington, dc.
The outer circumferential surface of the rim, which contacts the rail, is tread, and the projected part is flange. Problem of wheel rail profiles design exists for many years and different approaches have been developed to obtain satisfactory wheel rail profile combinations. Jul 28, 2010 a trip around the 712 gauge miniature railway at roundhouse park toronto looking at the left trailing wheel of a bench type passenger car. Appropriate design of the wheelrail interface, with attention to these factors, can greatly reduce maintenance requirements. Kevin oldknow chief engineer, wheel rail interface l.
A rolling component is typically pressed onto an axle and mounted directly on a rail car or locomotive or indirectly on a bogie uk, also called a truck north america. A good practice guide for managing the wheelrail 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. Wheel rail interface handbook details 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. Wheel rail interface handbook pdf free download epdf. The importance of wheelrail interface on energy savings. The material used for the railwheel contact is structural steel which isotropic behavior. Understanding the wheelrail interface part one the. Fundamentals of wheelrail interaction michael roney consultant and retired chief engineer, canadian pacific dr.
Dembosky, a investigation of vehicle dynamic influence on rolling contact fatigue on uk railways,a the dynamics of vehicles on roads and on tracks, volume. The greater the variation in horizontal movement, the greater the risk of corrugation. The approach is to scan a pulseecho probe along the rail which covers maximum part of rail head. The importance of wheelrail interface management on energy savings and sustainability railroad wheels and rails are made of high strength steel. Pdf presented at wheels on rails an update, seminar of the institution of mechanical engineers, london, april 2002. Conventional inspection methods have proven not to be reliable enough in this context. Vehicle dynamics and the wheelrail interface by jerry evans, aea technology rail simon iwnicki, manchester metropolitan university mmu from. Wheelrail interface handbook is a onestop reference for railway engineering practitioners and academic researchers. Materials used for wheels on rolling stock katrin madler, manfred bannasch deutsche bahn ag, technical centre, brandenburgkirchmoser, germany 1 introduction in the contact area between the wheel and the rail, the materials are used in those components encounter the greatest demands. Fundamentals of wheel rail interaction michael roney consultant and retired chief engineer, canadian pacific dr. Request pdf wheelrail interface handbook many of the engineering problems of. The key organisations involved in the wheelrail interface are described.
Kevin oldknow chief engineer, wheelrail interface l. 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. The impact on traction and braking performance is small and comparable to rainy weather conditions. Sanding is used in train operation to improve adhesion at the wheel rail interface during both braking and traction. Wheel and rail interface issues, virginia beach, va. Apr 09, 2015 while an important part of wheelrail interface management, tor friction management is only one piece of the puzzle. 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.
Rail wheel interface analysis is also of importance at switch and crossing areas where the following measurements can be correlated with the quality. New wheels are trued, using a lathe, to a specific profile. Railway and rail transit track infrastructure and components. Causes of rail cant and controlling cant through wheelrail. An adhesion railway relies on adhesion traction to move the train. Causes of rail cant and controlling cant through wheel. Cut spikes do not provide sufficient vertical rail restraint when subjected to high lateral forces. They include a hub, wherein an axle is inserted, a rim that contacts the rail, and a web that unites the two parts.
Wheel rail interface handbook is a onestop reference for railway engineering practitioners and academic researchers. Adhesion traction is the friction between the drive wheels and the steel rail. 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. Wheelrail noise 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. If you need to print pages from this book, we recommend downloading it as a pdf. A rolling stock perspective r d frohling and g hettasch proceedings of the institution of mechanical engineers, part f. P x z v f n f n r s w l s kp cp m sl kb b ks cs m w m w kw cw ei, kga, m figure 3. The following sections describe the evolution of wheel and rail materials and profiles, experience of wheel and rail surface damage, lubrication and friction control, and vehicle condition monitoring. Wheels are cast or forged and are heattreated to have a specific hardness. 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.
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. Electromechanical design and development of the virginia. A change in designed surface topology may result from wear that brings in a wide change in contact geometry and stresses. It provides the fundamentals of contact mechanics, wear, fatigue, and lubrication as well as stateoftheart research and emerging technologies. It is possible to find an optimal combination of wheel and rail profile when dealing with closed railway system, i. Redesign and optimisation of the wheelrail interface is a bold step for a railway system to take. The term adhesion railway is only used when there is need to distinguish adhesion railways from railways moved by other means, e. Electromechanical design and development of the virginia tech. References flange climb derailment criteria and wheelrail.
A single source for authoritative and uptodate information, this book discusses the safety critical role of the wheelrail interface and the challenges it poses. A trip around the 712 gauge miniature railway at roundhouse park toronto looking at the left trailing wheel of a bench type passenger car. Third, the wheel rail contact system is an open system, which is affected by various contaminants foreign substances applied both intentionally and unintentionally to the wheel rail interface 2. Cad model of railwheel contact the cad model of railwheel contact was saved in.
Pdf wheel rail interface handbook download full pdf. Read chapter appendix a effect of wheelrail profiles and wheelrail interaction on system performance and maintenance in transit operations. This book is a onestop reference for railway engineering practitioners and academic researchers. Buy wheelrail interface handbook woodhead publishing in mechanical engineering by r. This crossdisciplinary seminar will include presentations from experts in vehicletrack dynamics, noise and vibration, wheel rail profile design and maintenance, and friction management. A single source for authoritative and uptodate information, this book discusses the safety critical role of the wheel rail interface and the challenges it poses.
The focus is on safety improvement, maintenance and. Foster rail technologies with the assistance of and permission from sahha 2015 technical workshop, birchwood hotel 8. A steel wheel requires very little energy to roll on a steel rail. Abnormal wheel motion patterns can be caused because of poor rail profile or poor track geometry leading. International heavy haul association, guidelines to best practices for heavy haul railway operations. Wheel rail noise considerable benefits can be gained through appropriate wheel rail interface management, including reduced defect rates, improved safety, extended wheel and rail life, improved vehicletrack interaction, reduced wheel rail noise and the development of suitable standards and maintenance procedures. 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. Wheel rail interface monash institute of railway technology. This work should be read in conjunction with rtu report 903a, determination of tramway. Wheel rail interface rail adhesion from wikipedia, the free encyclopedia.
Wheels on rails an update, understanding and managing the wheelrail interface imeche seminar, london, april 2002 2002 the institution of mechanical engineers 1. Managing the wheel rail interface by modifying track gage, rail profiles, elevation, fastening systems and tor friction control can lower lateral forces. Elastic fasteners appear capable of handling high lateral forces. Appendix a effect of wheelrail profiles and wheelrail interaction. Engineering consultancy frazernash is providing safety validation, verifying whether the system can o. Such measurements require excellent powering and driving architecture, highperformance motion control, accurate measurements, and relatively noise free data acquisition systems. Static tests were performed using actual wheel and rail sections. A train wheel or rail wheel is a type of wheel specially designed for use on rail tracks. The vt roller rig is intended for studying the complex dynamics and mechanics at the wheelrail interface of railway vehicles in a controlled laboratory environment. Problem of wheelrail profiles design exists for many years and different approaches have been developed to obtain satisfactory wheelrail profile combinations. The low adhesion problem due to leaf contamination in the wheelrail contact. Wheelrail interface handbook free download as pdf file.
Aug 24, 2015 the probable encouragement for adopting 62ri1 is that wheel rail interface of lowfloor, multisection trams on rigid trucks or at best, almost rigid bogies is more complex than the longproven pcc and its derivatives. Ebook wheel rail interface handbook as pdf download. Sanding is used in train operation to improve adhesion at the wheelrail interface during both braking and traction. The rail steel can be assumed to have a shear yield strength of k70 ksi.
The two fundamental components in maintenance of the wheelrail interface are control of friction and control of the wheel and rail profiles. 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. Wheelrail interface handbook request pdf researchgate. An experimental study has been carried out to determine the effect of sanding on the wear of wheel and rail materials. Materials used for wheels on rolling stock railway research. 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. Aug 24, 2015 to compensate, the outer wheel endeavours to make the inner wheel revolve more rapidly than the ideal and if successful, the consequence is positive scuff on the low rail. Maintenance of the wheelrail interface sciencedirect. Interface journal the journal of wheelrail interaction.
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