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. One of the key issues in developing a dualoperation wheel profile was managing the contact conditions within the wheel rail interface. Create 3d model of the existing model of rail wheel axle from the 2d drawings. Sand tends to increase the wear rate of the rail by a factor between two to ten due to the damage caused by asperities in the wheel rail interface 18. Modelling the contact between wheel and rail within multibody. The importance of wheelrail interface on energy savings. Determination of wheelrail contact points in the simulation. However, the calculation of the stress at the wheel rail interface is dependent on the static and dynamic loading. Instrumented study of the wheelrail interaction jve. Gauge widening should therefore be restricted to curves which are large enough for flange free curving to occur. The material model is linearelastic and there is no friction between the contacting surfaces. Determination of tramway wheel and rail profiles to minimise.
Wheelrail interface handbook by elsevier science ebook scribd. Design and dynamic analysis of locomotive wheel axle. Therefore, the condition of the wheelrail interface is important, since the state of the wheel. Wheels on rails an update, understanding and managing the wheel rail interface imeche seminar, london, april 2002 2002 the institution of mechanical engineers 1.
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. Wheelrail force analysis under rail transit loading. Improperly trued wheels increase rolling resistance, reduce energy efficiency and may create unsafe operation. Investigating the influence of angle of attack yaw on wheel rail interface wri dynamics. Wayside condition monitoring system for railway wheel. Now we can introduce some assumption for simplify the model. The uncontrolled wheelrail interface has highly variable friction. Accelerations of the body of the wagon are measured using motion sensors located at suitable points on the body. The rail technology unit vehicle dynamics and the wheel rail interface evans j, iwnicki s. Case study effect of wheel rail interface parameters on contact stability in explicit finite element analysis yuewei ma 1, valeri l markine1, abdul ahad mashal1 and mingfa ren2 abstract it is widely recognized that the accuracy of explicit finite element simulations is sensitive to the choice of interface.
Modelling the contact between wheel and rail within. Request pdf wheel rail interface handbook many of the engineering problems of particular importance to railways arise at interfaces and the safetycritical. Better understanding of wheel rail interfaces is therefore critical to improving the capacity, reliability and safety of the railway system. This is because sand could cause indents and scratches on the wheel. Vertical and lateral loads at the wheel rail interface and rail seat instrumentation description and methodology. Estimation of wheel rail interaction forces download pdf info publication number us20090076742a1. The interaction of the rail and wheel and the resulting phenomena.
As with all frauscher axle counting sytems, wheel sensors rsr180 or rsr123 form the basis for highly available and failsafe train detection. Wheelrail interface handbook pdf teethchaputmosur2. Fundamentals of wheel rail interaction michael roney consultant and retired chief engineer, canadian pacific dr. Appendix a effect of wheelrail profiles and wheelrail.
By way of a rail claw, theyre quickly and easily mounted onto the track without having to drill holes into it. The low adhesion problem due to leaf contamination in the wheel rail contact. Integrated wheelrail characterization through advanced. A railroad wheel typically consists of two main parts. Investigating the influence of angle of attack yaw on wheel. If necessary, add after the link to keep me from modifying it. Rail operators and infrastructure owners are aware that maintenance of wheels and rails are big cost drivers. This has drawn much attention of many researchers to investigate the problem mainly by means of theoretical. An approximate analysis for hertzian elliptical wheelrail. Pdf 819 k image quality enhancement using pixelwise gamma. Introduction the formation of rolling contact fatigue rcf in rails is due to the combination of contact stress. Abaqus tutorial dynamic analysis of wheelrail interaction.
Download wheel rail interface handbook free book pdf. Chemistry of black leaf films synthesised using rail steels and their influence on the low friction mechanism. The contact area at each wheel tread low rail interface is approximately circular, with a typical radius of 7mm. Instrumented study of the wheelrail interaction jve journals. Despite the pollutionfree lubricant, adhesive and abrasive wear is not.
Us20090076742a1 estimation of wheel rail interaction. The damage in this area is due to the repeated cyclic loading of the wheel. The rail transit seminar is devoted to examining wheel rail and vehicletrack interaction on light rail and subway operations. This crossdisciplinary seminar will include presentations from experts in vehicletrack dynamics, noise and vibration, wheel rail profile design and maintenance, and friction management. Effect of wheel rail interface parameters on contact stability in explicit finite element analysis yuewei ma 1, valeri l markine1, abdul ahad mashal1 and mingfa ren2 abstract it is widely recognized that the accuracy of explicit finite element simulations is sensitive to the choice of interface. Railway vehicles operating in the uk use wheelsets comprising two wheels fixed to a common axle. The increased energy dissipated at the wheel rail interface from wheel rail profile mismatch and friction directly affects the fuel required to haul a train. Wheel rail interface handbook will be a onestop reference for railway engineering practitioners and academic researchers, providing the fundamentals of contact.
Wheel rail interface rail adhesion from wikipedia, the free encyclopedia. Better understanding of wheel rail interfaces is therefore critical to improving the capacity, reliability. Us20090076742a1 estimation of wheel rail interaction forces. Materials free fulltext wear enhancement of wheelrail. The wheelrail interface is the contact area where wheel rail interaction between wheels and rails in railways takes place. Pdf condition monitoring at the wheelrail interface for. The cross sections of the railway wheel and rail are referred to as profiles that are the.
Contracts should encourage active and integrated management of the interface. It is important to understand here that rail wheel contact pairs profile radii change with time and wear. Unlike some other means of transportation such as road, vehicles and aircraft, railway vehicles run on rails that are fixed to the ground through sleepers and ballasts or slabs. Industry standard strain gauge bridges applied to rail web and. The wheel rail interface challenges have been highlighted and discussed and the analysis and design process required to develop an optimised wheel profile for dual operation running has been presented. Abaqus tutorial dynamic analysis of wheelrail interaction contact analysis explicit 1620part2. Understanding the wheelrail interface part one the. Wheelrail force analysis under rail transit loading conditions. But the impacts of wheel and rail profiles on the performance of the vehicletrack interaction are large and the decision should not be made. Get free wheel rail interface handbook textbook and unlimited access to our library by created an account. Friction conditions at the wheel rail interface can influence the steering, traction and braking behaviour of railway vehicles, as well as damage to wheel and rail materials. Wheel rail interface management wheel rail contact analysis aka wrtol fig. Investigating the influence of angle of attack yaw on.
A survey of wheelrail friction federal railroad administration. Simulation of wheelrail contact forces request pdf. The wheel acts as a rolling component, typically pushed onto an axle and mounted directly on a railway carriage or locomotive, or indirectly on a bogie in the uk, also called a truck in north america. Many railway assets, such as wheels, suffer from increasing deterioration during operation. Influence of white etching layer on rolling contact behavior. This is also the foundation of simpacks wheel rail functionality which will be pointed out in the sequel. Friction, friction management, lubrication, vehicletrack interaction, wheelrail interaction. Tribology at the wheel rail interface download behaviour depends on browsers and you can experience any of the below behaviour. Rail transit seminar wheel rail interaction conference 2021. The increased energy dissipated at the wheelrail interaction from wheelrail profile mismatch and the frictionwear directly affects the fuel required to haul a train. Good condition monitoring based on good decisionmaking techniques can lead to accurate assessment of the current health of the wheels. Concerning the rail coordinate system, xb is parallel to the track direction, yb is on the plane defined by the rails and normal toxb, zb wi tr a nscti o engineering sciences, vol 62, 2009 wit press. This, in turn, will improve safety, facilitate maintenance planning and scheduling, and reduce maintenance costs and downtime.
Foster rail technologies with the assistance of and permission from sahha 2015 technical workshop, birchwood hotel 8 october, 2015. Design and optimisation of wheelrail profiles for adhesion. This book is a onestop reference for railway engineering practitioners and academic researchers. Download and read online wheel rail interface handbook, ebooks in pdf, epub, tuebl mobi, kindle book. Interface journal the journal of wheelrail interaction. Wheel rail interaction based on roughness calculation. Accurate wheelrail dynamic measurement using a scaled roller rig. Maintenance of the wheelrail interface sciencedirect. An efficient interaction between the vehicle and the track can support large loads per axle, and an inappropriate design and maintenance of the wheel rail interface can bear to a fast degradation of the system components and put in risk the lucrative character of the railway operation. Influence of white etching layer on rolling contact. This is because sand could cause indents and scratches on the wheel and rail surfaces because of its hardness 14 and gives a high value of mass loss 16. A good practice guide for managing the wheelrail interface of. Jan 01, 2009 the two fundamental components in maintenance of the wheelrail interface are control of friction and control of the wheel and rail profiles.
Design and performance analysis of a tramtrain profile. A good practice guide for managing the wheelrail interface. This radius can be different for the right and the left wheel as a wheelset is moving along a track r 1 andr 2 respectively, as shown in figure 2. Design and performance analysis of a tramtrain profile for. Even though the influences of friction and sr on wheel rail interface have been extensively studied 21, 33, 35, 3741, the effects of friction and sr on the rcf properties of the wel were not mentioned in these reports and are still missing. The wheel rail interaction problem can be treated as a problem of one object, the wheel, rolling on another object, the rail. 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. Alternatively, you can add nobotsdenyinternetarchivebot to keep me off the page altogether. Request pdf wheelrail interface handbook many of the engineering problems of particular importance to railways arise at interfaces and the safety critical. Kevin oldknow chief engineer, wheel rail interface l.
Wheel rail interface most of the problems in railway systems nowadays originate in the wheel rail interface, resulting in broken rails, crossings and wheels, which are the main source of disruptions in a railway network. The wheel has no roughness and can be considered perfect. The wear of wheels and rails has been shown in empirical studies to be dependent on the rate of. Rail interaction fundamentals for railway professionals. The rail can be considered almost perfect with only one imperfection. The wheel rail interface is one of the most crucial points that must be checked to determine the performance of a train and consider its safety. Perform design calculations of rail wheel axle model. A train wheel or rail wheel is a type of wheel specially designed for use on railway tracks. The rail steel can be assumed to have a shear yield strength of k70 ksi. Determination of tramway wheel and rail profiles to. Wheels tend to roll in the direction in which they are facing. If you need to print pages from this book, we recommend downloading it as a pdf.
Wheel rail interface load quantification slide 12 instrumentation overview vertical and lateral wheel loads desired data. Reducing friction levels between the rail gauge face and wheel. Wheel rail contact properties an important characteristic of the contact between wheel and rail is the rolling radius of a wheel at the contact point 3. Designing and assessing wheelrail profiles for improved rolling. Is it possible to avoid them or reduce their negative effect and how. During the design and delivery of a light rail project, there should be a nominated design authority whose remit covers both sides of the wheel rail interface. Wheel rail interface handbook is a onestop reference for railway engineering practitioners and academic researchers. The wheel rail contact is in between a onefourth scale aar1b locomotive wheel and a roller machined to us6 rail profile. Hello fellow wikipedians, i have just added archive links to one external link on wheel rail interface. Forces on the side frames of the wagon are calculated based on the accelerations of the body and predetermined. Appropriate design of the wheel rail interface, with attention to these factors, can greatly reduce maintenance requirements. Since adhesion is force acting at the wheela rail interface, wheel rail contact conditions need to be discussed first. 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. Pdf wheelrail interface handbook ebook download and.
Foster rail technologies with the assistance of and permission from sahha 2015 technical workshop, birchwood hotel 8. Accurate wheelrail dynamic measurement using a scaled. Provide background information and important concepts relating to wheel. The tangential contact problem involves calculating the creep forces that are developed in the wheel rail interface as a result of braking, traction and acceleration. This reduces the amount of time that work crews spend in a hazardous area to a minimum. Wheelrail interface handbook request pdf researchgate. A method of estimating contact forces between the wheels of a railway wagon and a rail track, for use in determining information such as the likelihood of derailment.
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