Ambala cantt ludhiana amritsar mainline electric multiple unit m emu. A fresh wheelflat has the shape of a geometric chord on the wheel circumference. Sep 30, 2014 characteristics of wheel rail dynamic interaction due to the rail corrugation in a highspeed railway are analyzed based on the theory of vehicletrack coupled dynamics in this paper. 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. Rail corrugation detection of highspeed railway using. Focus of this first stage of work is placed on the repeatability of signals from the same wheel rail interactions while the rail is in healthy state. This work reports a 3d finite element model of wheel rail rolling contact which can simulate dynamic wheel rail interaction at arbitrary contact geometry up to 400 kmh. 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. In the darts model, the loads were introduced via hertzian springs traversing a sineshaped railtrack surface, as shown in fig. Dynamic response of wheelrail interaction at rail weld in. This model is employed to investigate dynamic response of wheel rail interaction at theoretical and measured rail weld, including wheel rail force and axlebox acceleration. Sponsored by progressive railroading, advanced rail management corp.
Twins provides a tool for detailed design of components, taking into account their interaction, and allows the total noise to be minimised. 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 body separates wheel and rail surface, accommodates velocity differences and determines wheelrail friction. Kevin oldknow chief engineer, wheelrail interface l.
For instance, kassa and nielsen 5,6 used the commercial multibody system mbs software, gensys, to model the dynamic interaction between the railway vehicle and turnout. The 24th annual wheel rail interaction conference will be held april 30 to may 3, 2018, at the crowne plaza chicago ohare hotel, in rosemont, ill. Wheelrail nonlinear interaction with coupling between. One of the key issues in developing a dualoperation wheel profile was managing the contact conditions within the wheelrail interface. Management on energy savings and sustainability railroad wheels and rails are made of high strength steel.
The stressstrain of thin multilayered coatings covered the surface of the rail is studied near the region of side contact in turning motion. Third body at wheelrail contact third body is made up of iron oxides, sands, wet paste, leaves etc. 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. Jun 29, 2012 the paper is devoted to the experimental, theoretical analysis and computer simulation of influence of elastic properties of contact stiffness and wheel plate stiffness on the forces of vehicletrack interaction. Railway rolling noise engineering university of southampton. Kevin oldknow chief engineer, wheel rail interface l. This work reports a 3d finite element model of wheel.
Electromechanical design and development of the virginia. The wheelrail interface is the contact area where wheelrail interaction between wheels and rails in railways takes place. Wheelrail interface handbook is a onestop reference for railway engineering practitioners and academic researchers. In the darts model, the loads were introduced via hertzian springs traversing a sineshaped rail track surface, as shown in fig. If you need to print pages from this book, we recommend downloading it as a pdf. Analysis of design and performance of tramtrain profiles. D 33 x v d w x 100 d wheel diameter in v speed mph p static load lbs larger wheels impose less influence additional dynamic loads from impacts such as caused by wheel flat spots, rail discontinuities e. Such measurements require excellent powering and driving architecture, highperformance motion control, accurate measurements, and relatively noise free data acquisition systems. 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. The vehicle model and the track model are coupled by wheel rail interaction. Dynamic simulation of tramtrain vehicles on railway track. Contaminants, which refer to foreign substances applied both intentionally and unintentionally the wheel to rail interface, can make wheelrail adhesion either too high or too low and to difficult predict. To minimize lateral vehicle acceleration and jerk, lateral wheel rail contact forces and wear, oswald and bishop 6 simulated lowfrequency dynamic interaction to reach an optimum turnout geometry. Trains is the presenting sponsor of wheel rail interaction. Analysis of wheelrail interaction using fe software. This wheelrail noise consists mainly of rolling noise. Newton and clark 5 calculated the wheel rail interaction forces caused by wheel flats using a timedomain model in which the linear wheel vehicle and track models interact through a nonlinear contact stiffness. Effects of profile wear on wheelrail contact conditions. Groundborne vibration from railways is generated at the wheel rail interface due to the passage of individual wheel loads along the track quasistatic loading and due to dynamic interaction forces caused by irregularities of the wheels and tracks dynamic loading.
The vertical and lateral wheelrail interactions are coupled to a large. 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. Wayside measurement of lateral and vertical wheelrail. The elastic compression between wheel and rail is determined. Wheel rail interface monash institute of railway technology. A maximum of 70% of your registration fee may be refunded to you if wheel rail seminars receives written notice of cancellation on or before 61520.
Focus of this first stage of work is placed on the repeatability of signals from the same wheelrail interactions while the rail is in healthy state. The effect of track load correlation on groundborne. Electromechanical design and development of the virginia tech. By jeff tuzik for over 20 years, the wheelrail interaction conferences have brought together railway industry professionals, researchers and suppliers to share their expertise in the field of wheelrail interaction. Other types of wheelrail noise are impact noise and curve squeal, with the latter also being relevant at low speeds. Wayside measurement of lateral and vertical wheelrail forces. How about the other part of the wheelrail wear system. Three types of wheels are considered with different contact stiffness and wheelplate design. 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. Three types of wheels are considered with different contact stiffness and wheel plate design.
Wheelrail interaction analysis tanel telliskivi tritammk 2003. Part one provides the fundamentals of contact mechanics, wear, fatigue and lubrication as well as stateoftheart research and emerging technologies related to. The model of the moving irregularity is much easier to use and it is currently utilized for the frequencydomain analysis 5. This study presents the analysis on the unique signatures from the data collected to characterise wheelrail interaction for rail defect detection.
Influences of the corrugation wavelength and depth on the wheel rail dynamic performance are investigated. Rail track irregularities can be considered as one of the most important sources of loads, generated by a moving train. Influences of the corrugation wavelength and depth on the wheelrail dynamic performance are investigated. Other types of wheel rail noise are impact noise and curve squeal, with the latter also being relevant at low speeds. Professor in charge of thesis on behalf of the advisory committee approved. Exemplary simulation of freight car interaction with track which posses one corrugated. 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. Wheelrail contact behaviors in the switch have been studied with a number of laboratory experiments and numerical procedures. Materials used for wheels on rolling stock railway research. Forces from the wheels with flats can be up to four times higher than those from normal wheels. A typical railway wheel has a wheel tread, where the wheel is usually in contact. On the coupling of the vertical, lateral and longitudinal wheelrail. Rail corrugation detection of highspeed railway using wheel. View our free webcam at this popular illinois hot spot wheel rail interaction conference join industry experts from wheel rail seminars in vancouver, b.
On new effects of wheelrail interaction springerlink. Wheelrail dynamic interaction due to excitation of rail. A timedomain model can be used to study nonlinear interaction between the wheel and rail. Properly laid girder rail gauge and check faces wear simultaneously from the outset, with checks on curves being sufficiently robust to accept wear, a fact that anyone can verify by examining.
Rail accident investigation branch raib 29,596 views. Staskiewicz and others published analysis of wheelrail interaction for the development of a new tramway wheel profile find, read and cite all the research you need on. A rolling component is 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. Wheelrail interaction fundamentals kevin oldknow, ph. A study on the wheelrail interaction at switch points to reduce derailments in turnouts by samet ozturk a thesis submitted to the faculty of the university of delaware in partial fulfillment of the requirements for the degree of master of civil engineering spring 2014.
According to hertzian nonlinear elastic theory, the vertical force between the wheel and rail is defined as where is the wheel rail contact constant and is the elastic compression deformation between the wheel and rail. Wheelrail interaction fundamentals wri 2015 20150517. V 16 small positive longitudinal creepage wheel rail. A study on the wheel rail interaction at switch points to reduce derailments in turnouts by samet ozturk approved. The paper is devoted to the experimental, theoretical analysis and computer simulation of influence of elastic properties of contact stiffness and wheelplate stiffness on the forces of vehicletrack interaction. Pdf wheelrail interaction due to the polygonal wheel. Wheels are cast or forged and are heattreated to have a specific hardness. Wheelrail interaction due to the polygonal wheel 97 in terms of the relative displacements between the rail crosssection and the rail pad, the model of the rail pad has three kelvinvoigt systems with the elastic constants kx, kr and k. Understanding the wheelrail interface part two the. The vibration due to the interaction between the wheel and rail with random surface roughness 16,17,18,19,20,21,22,23,24,25,26,27,28,29 and vibration due to. The vti monitor applies a train path free approach by utilizing compact sensors, gps and wireless communication devices. Wheel rail interface handbook is a onestop reference for railway engineering practitioners and academic researchers.
A large force from the first body wheel is transferred to the second body rail through a small contact region about 1 cm2. Wheelrail interaction due to the polygonal wheel article pdf available in upb scientific bulletin, series d. Nscos autonomous vehicletrack interaction vti monitor provides unattended conditionbased monitoring of the interactions that take place between the rail vehicle and the track. Wheel rail interaction call for papers trains magazine. Appendix a effect of wheelrail profiles and wheelrail interaction. Railtrack irregularities can be considered as one of the most important sources of loads, generated by a moving train. Newton and clark 5 calculated the wheelrail interaction forces caused by wheel flats using a timedomain model in which the linear wheelvehicle and track. According to hertzian nonlinear elastic theory, the vertical force between the wheel and rail is defined as where is the wheelrail contact constant and is the elastic compression deformation between the wheel and rail. Wheelrail friction depends on the shear properties composition of the third body layer. The importance of wheelrail interface on energy savings. Groundborne vibration from railways is generated at the wheelrail interface due to the passage of individual wheel loads along the track quasistatic loading and due to dynamic interaction forces caused by irregularities of the wheels and tracks dynamic loading. It describes the wheel rail interaction model, as well as models for the wheel and rail mobilities, including models for the mobilities of the contact zone itself. The number of measurement tools, the number of parameters that can be measured, and the accuracy of those measurements have changed the way wheel and rail systems are designed, monitored and maintained. Characteristics of wheelrail dynamic interaction due to the rail corrugation in a highspeed railway are analyzed based on the theory of vehicletrack coupled dynamics in this paper.
This is because the wheel and rail deform very little under load, unlike a rubber. Analysis of design and performance of tramtrain profiles for. The rail wheel interaction can induce train and track vibrations and consequently lead to noise impact, passengers discomfort, high maintenance cost, etc. Wheel flanges taper outwards from the tip, meaning that on railways, interaction occurs only after severe wear or if something else is seriously amiss. A steel wheel requires very little energy to roll on a steel rail. The vehicle model and the track model are coupled by wheelrail interaction. Pdf vehicle dynamics and the wheelrail interface researchgate. Simulation of wheelrail interaction in turnouts and. It describes the wheelrail interaction model, as well as models for the wheel and rail mobilities, including models for the mobilities of the contact zone itself.
Pdf presented at wheels on rails an update, seminar of the institution of mechanical engineers, london, april 2002. Restricting the field to papers dealing with mutual wheel rail interaction measurements and discarding those dealing with instrumented wheelsets, all of them indicate that electric resistance strain gauges er attached to the rail are the most appropriate sensor to detect rail deformation from which loads may be. 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. The railwheel interaction can induce train and track vibrations and consequently lead to noise impact, passengers discomfort, high maintenance cost, etc. You may elect to receive a fullcredit attendance at the next years events or send an alternate attendee from your organization. Until recently, the conferences have been held only in the united states and have drawn on north american experiences. Signature analysis on wheelrail interaction for rail. Read chapter appendix a effect of wheelrail profiles and wheelrail interaction on system performance and maintenance in transit operations. Foster rail technologies with the assistance of and permission from sahha 2015 technical workshop, birchwood hotel 8. 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 been presented. As a main part of continuously welded rail track, rail weld widely exists in highspeed railway. Lubricants free fulltext frictioninduced vibration of a railway. As the wheelrail contact is an open system, the adhesion between the wheel and rail is inevitably affected by contaminants. Flange climb derailment criteria and wheelrail profile.
It also describes the effect of the contact patch between wheel and rail in filtering the roughness, followed by a discussion of the measurement and analysis of surface roughness. 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. By jeff tuzik its easier now than ever to collect data on wheelrail interaction. This study presents the analysis on the unique signatures from the data collected to characterise wheel rail interaction for rail defect detection. Mechanical engineering 733 january 2011 with 238 reads how we measure reads. A train wheel or rail wheel is a type of wheel specially designed for use on railway tracks. In this paper, wheelflat and rail interaction dynamics is modeled through a finite element model. Restricting the field to papers dealing with mutual wheelrail interaction measurements and discarding those dealing with instrumented wheelsets, all of them indicate that electric resistance strain gauges er attached to the rail are the most appropriate sensor to detect rail deformation from which loads may be.
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