Railroad vehicle dynamics indian institute of technology. Request pdf wheelrail interface handbook many of the engineering problems of particular importance to railways arise at interfaces and the safetycritical role of the wheelrail interface. There is clearly a need for information about the wheel rail contact interface in term of position, area, and contact stresses. The wheel profile of a rail vehicle is one of the key elements on which its ride dynamics depend. The rail transit seminar is devoted to examining wheel rail and vehicletrack interaction on light rail and subway operations. At the interface there must be low friction to permit moving heavy loads with little resistance. Guard rails are usually placed parallel to regular running rails along areas of restrictive. 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. Preengineering the wheelrail interface interface journal. Thermal or thermomechanical loading is one of the major causes of wheel surface damage in australian heavy haul operations. The outer circumferential surface of the rim, which contacts the rail, is tread, and the projected part is flange. Buy wheelrail interface handbook woodhead publishing in mechanical engineering by r. Wheelrail interface handbook is a onestop reference for railway engineering practitioners and academic researchers. Handbook of railway vehicle dynamics, second edition, provides expanded, fully updated coverage of railway vehicle dynamics.
Analysis of design and performance of tramtrain profiles for. Feasibility study for an ultrasonic sensor for monitoring. Knowledge of wheelrail interaction is essential for anyone involved in the operations of railways over the full spectrum of heavy. Flange climb derailment criteria and wheelrail profile. Such damage can incur heavy machining penalties or even premature scrapping of wheels. Understanding the wheelrail interface part one the. Cut spikes do not provide sufficient vertical rail restraint when subjected to high lateral forces. 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.
Wheels on rails an update, understanding and managing the wheelrail interface imeche seminar, london, april 2002 2002 the institution of mechanical engineers 1. The highly stressed wheel rail interface is a key cost driver for rail operators. The handbook includes chapters on vehicles, alignment, track structures, track components, special. Wheelrail interface handbook free download as pdf file. Causes of rail cant and controlling cant through wheelrail.
Light rail track design handbook list of figures figure 4. The main advantage of the presented method is the total elimination of frequency analysis, which in effect introduces important simplifications in the identification of the effects in the contact. Interface journal the journal of wheelrail interaction. 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. 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. Tribology at the wheel rail interface download behaviour depends on browsers and you can experience any of the below behaviour. Railwheel systems cm2003 in gothenburg, sweden june 10, 2003 submitted to wear journal june 2003 optimal design of wheel profile for railway vehicles i. No such compromise can be reached without sustaining a sensible dialogue across the wheelrail interface. Thus better understanding of wheel rail interfaces is critical to improving the capacity, reliability and safety of the railway system. The outer circumferential surface of the rim, which contacts the rail. Causes of rail cant and controlling cant through wheel. The focus is on safety improvement, maintenance and. Buy wheel rail interface handbook woodhead publishing in mechanical engineering by r. Oct, 20 by rob caldwell october 2010 the wheelrail interface is a complex system one that benefits greatly from careful preengineering.
The importance of wheelrail interface management on energy savings and sustainability railroad wheels and rails are made of high strength steel. The wheel rail interface issues focuses on the critical area of the wheel rail contact that is so important to successful railway operations. International heavy haul association, guidelines to best practices for heavy haul railway operations. Wheels on rails an update, understanding and managing the wheel rail interface imeche seminar, london, april 2002 2002 the institution of mechanical engineers 1. Numerical analysis of the effect of slip ratio on the. The wheelrail interfacesome recent accidents smith 2003. Lewis kostenlose pdf d0wnl0ad, horbucher, bucher zu lesen, gute bucher zu lesen, billige bucher, gute bucher. Request pdf wheelrail interface handbook many of the engineering problems of particular importance to railways arise at interfaces and the safetycritical role of the wheel rail interface. With chapters by international experts, this work surveys the main areas of rolling stock and locomotive dynamics.
Kevin oldknow chief engineer, wheel rail interface l. In this paper we present new numerical simulation approaches for determining the energy processes under periodic conditions caused by timediscontinuous forces in the wheel rail contacts. Pdf a study of railway wheel profile parameters used as. A steel wheel requires very little energy to roll on a steel rail. Handbook of railway vehicle dynamics, simon iwnicki, crc press railway noise and vibration, david thompson, elsvier wheel rail interface handbook, r. A solid wheel of a railway vehicle hereinafter wheel consists of three parts, as shown in fig. Less likely, the inner wheel tries to make the outer wheel turn slower, success resulting in negative scuff on the high rail.
The wheelrail interface is the contact area where wheelrail interaction between wheels and rails in railways takes place. Introductory handbook ontrain18 page 6 preface while india has one of the worlds largest rail networks, it is mostly creaky and outdated in terms of speed, technology, safety, and passenger comfort. Department of mechanical engineering the university of. The contact area at each wheel tread low rail interface is approximately circular, with a typical radius of 7mm. The distribution of tangential traction and contact stresses on the contact surface, when rolling contact occurs between two cylindrical test specimens, are obtained using threedimensional finite element analysis. By bob tuzik for three years running, new york city transit and the federal transit administration have kicked off the annual wheel rail interaction rail transit conference with discussion of the nyctfta research project to explore integrated wheel rail analytics on mtanycts no. Pdf mitigating train derailments due to sharp curve and. Even small changes in the wheel tread geometry resulting from its gradual wearing can significantly affect not only passenger comfort, but also result in a change in vehicle behavior when running on a straight track, and when running through a track curve, there is a significant change in the. Inadequacies in the wheel rail interface are apparent where stresses are high and become apparent most. The first section provides the fundamentals of contact mechanics, wear, fatigue and lubrication as well as stateoftheart research and emerging technologies related to the wheel rail interface. By delivering precise amounts of lubricant directly to the wheel rail interface, automatic lubrication systems provide significant benefits in terms of wear, energy and noise reduction.
The tool for wheel profile wear research from the track. 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. Friction occurs on all wheel flange contacts of a train and has impact on every journey, every day. 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. When damage is contained by a better design of the wheelrail interface, maintenance can be better planned and can become preventive, thereby extending the life of the components of both vehicle and track. Wheelrail interface handbook woodhead publishing in. In addition, multiwear wheels appear to be particularly sensitive to thermomechanical damage during their first service life. Wheelrail interface handbook and millions of other books are available for amazon kindle. Managing the wheel rail interface by modifying track gage, rail profiles, elevation, fastening systems and tor friction control can lower lateral forces. This book is a onestop reference for railway engineering practitioners and academic researchers. By 2006, there were about 600 of these and they had become the. Read track design handbook for light rail transit, second. Wheel rail interface monash institute of railway technology. There are significant benefits from properly addressing the wheelrail interface, and serious consequences from allowing the interface to govern itself.
Tcrp report 57 track design handbook for light rail transit transportation research board. With the ongoing increase on the speed, the possibility of train derailment increases, especially on the sharp curved tracks. Scribd is the worlds largest social reading and publishing site. Foster rail technologies with the assistance of and permission from sahha 2015 technical workshop, birchwood hotel 8. Maintenance of the wheelrail interface sciencedirect. The rail steel can be assumed to have a shear yield strength of k70 ksi. The wheelrail interaction short course will develop an appreciation of the multidisciplinary nature of the technology that substantially adds to the bottom line of any railway business. Accidents, caused by both human and technical factors, are frequent. This paper presents a numerical analysis of the effect of slip ratio on the fatigue crack initiation life, considering the tangential traction on the rolling contact surface. 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. Wheel and rail interface issues, virginia beach, va. While there are examples of both pre and postengineering scenarios, there. 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.
Through mathematical analysis and practical examples, it builds a deep and functional understanding of the wheel rail interface, suspension and suspension component design, simulation and testing of electrical and mechanical systems, interaction with surrounding infrastructure, and. In the mid2000s, a new rail defect that was initially classified as a squat became increasingly common on london undergrounds track. The wheelrail interface is the contact area where wheel rail interaction between wheels and rails in railways takes place. Rail transit seminar wheel rail interaction conference. The condition of rail tracks plays a significant role in the reliability of railway operations.
Rail and wheel geometry 6 hrs theory of curves, geometry of surfaces, rail geometry, definitions and. It provides the fundamentals of contact mechanics, wear, fatigue, and lubrication as well as stateoftheart research and emerging technologies. Everyday low prices and free delivery on eligible orders. Contains discussions on the vehicletrack interactions, wheel rail interfaces, cost benefit analysis, and more. Fundamentals of wheel rail interaction michael roney consultant and retired chief engineer, canadian pacific dr. The importance of wheelrail interface on energy savings. Lewis fur online ebookwheelrail interface handbook by.
Modeling of energy processes in wheelrail contacts. 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. Handbook of railway vehicle dynamics crc press book. The challenges of wheelrail interface have been highlighted and discussed, and the analysis and design process required to develop an optimised wheel profile for dualoperation running have. Each year around the world there are still several cases of train derailments on the curved tracks due to overspeed, leading to big casualties and costs to the rail industries.
The importance of the wheelrail interface to the safe operation of railways is discussed. Increase reliability on track with skf maintenance solutions. Effective management of the wheel rail contact is an important aspect of rail infrastructure operations. Several recent accidents involving the wheelrail interface are described. Through mathematical analysis and numerous practical example. They include a hub, wherein an axle is inserted, a rim that contacts the rail, and a web that unites the two parts. Some aspects of the history of rails and wheels are introduced. Rail wheel systems cm2003 in gothenburg, sweden june 10, 2003 submitted to wear journal june 2003 optimal design of wheel profile for railway vehicles i. Vehicle dynamics and the wheelrail interface by jerry evans, aea technology rail simon iwnicki, manchester metropolitan university mmu from. Esveld section of road and railway engineering faculty of civil engineering and geosciences, delft university of technology stevinweg 1, nl2628, cn delft. References flange climb derailment criteria and wheelrail. Fundamentals of wheelrail interaction michael roney consultant and retired chief engineer, canadian pacific dr. 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. Please note electronic pdf proofs andor laser proofs are for content and layout only.
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