Since 1994 we have hosted speakers and attendees from around the globe, bringing focus and understanding to the critical area of wheelrail interaction. Vehicletrack interaction ztrack features excitation to the vehicle straight or curved track real track irregularities ztime domain zfrequency domain simulation of specific irregularities zaccurate modelling of wheelrail contact needed cornerstone of vehicle running dynamics zsource of excitations tribology problems wear prediction. A standard rail uic 60 and standard wheel profile, as per the standards of indian railways, were taken for different rail profile radii, wheel profile radii and wheel profile tapers. Managing the wheelrail interface by modifying track gage, rail profiles, elevation, fastening systems and tor friction control can lower lateral forces. In this paper wheel flat and rail interaction dynamics, modeled through a finite element model is described. Safety and economy of railway traffic is enormously influenced by the contact stress variation caused by wheel rail contact profile changes. Analysis of wheelrail interaction using fe software. The measured irregularities are utilized to evaluate vehicletrack interaction effects by use of a vehicletrack coupled dynamics model. Pdf analysis of wheelrail interaction for the development of a new. Modeling of subsurface cracking in railroad wheels 2.
Dynamic contact analysis of wheel and rail mechanism for. 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 paper is focused on the interaction between tram wheel and rail, which was. Flange climb derailment criteria and wheelrail profile. Analysis of wheelrail interaction using fe software has been studied by sladkowski and sitarz 4. Finite elements analysis of the railwheel rolling contact. Wear 258 2005 12171223 analysis of wheelrail interaction using fe software aleksander sladkowski. The process will exploit genetic algorithm as well as finite element method and multibody simulation software. Pramod murali mohan 9 has studied the applications of railway wheel viz. This study combines structural failure analysis, finite element analysis, fracture mechanics, and reliability analysis methods to develop a new methodology to analyze and simulate railroad wheel failure. Development of a vehicletrack interaction model to predict the. Table 4 sensitivity analysis of the vehicle suspensions. Without having an appropriate understanding of the wheel rail interaction, the essential safety analysis of stability and derailment or the ride comfort analysis are incomplete 2. Sitarz, analysis of wheelrail interaction using fe software, wear, vol.
The mesh was much too course to investigate stickslip behaviour in the contact patch, but this is possible using the explicit fe method and a finer mesh. Then, the modal properties of tracks are exported from finite element software into. The dynamic forces generated at the track vehicle interaction mainly depend on the spatial track centreline 18, 21. The present study focuses on the influence of interacting wheel and rail profile topology. Kevin oldknow chief engineer, wheelrail interface l. The cause for flat damage on wheels,its physical characteristic, geometric representation,and its precaution are discussed in this paper,and applied to the simpack multibody dynamics software, a input form. This research is divided into four objectives as follows. 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. To investigate wheelrail interaction resulting from actual outofround wheels, wheel radial irregularities are measured from chinese 25g passenger trains. Dynamic contact analysis of wheel and rail mechanism for obtaining maximum contact pressure.
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. Dynamic analysis of wheelrail interaction using finite element. A new solution method for wheelrail rolling contact. An alternative solution of traintrack dynamic interaction hindawi. The elasticplastic contact problem with rolling friction of wheelrail is solved using the fe parametric quadratic programming method. Elastic fasteners appear capable of handling high lateral forces. Other original contribution of this research is to create a precise finite element model of a 3d rail wheel, axle and pads in order to evaluate stresses, strains, and contact forces in this complex interaction system. In this paper, the analytical segment approach is used to parameterise the track centreline 1516. Until recently, the conferences have been held only in the united states and have drawn on north american experiences.
The data analysis software computes the contact parameters by placing each wheelset on the measured rail pair. Otherwise, if convergence of the train position, wheelrail interaction forces, and trackbridge fe nodal positions is achieved fig. Dynamic analysis of wheelrail interaction using finite element method. Performance analysis of wheel and rail contact by nature of.
The accurate description of both the vehicle and the track is essential for the dynamic analysis of railway systems3. Wheelrail wear and surface fatigue depend greatly on the contact stress, which in turn is controlled by the wheelrail profiles and the way they interact. 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. Dynamics analysis of wheel rail contact using fea article pdf available in procedia engineering 144. On the other hand, some practical methods have also been introduced to solve traditional problems related to rail wheel interaction.
The wheel rail interaction conference offers one of the best educational, networking and professional development values in the industry. Sladkowski, aleksander and sitarz, marek, analysis of wheelrail interaction using fe software. Rail irregularity was also considered in the analysis. Overview 2 part 1 the wheel rail interface anatomy and key terminology. Effect of wheelrail interface parameters on contact stability in. To study the influence of interacting wheel and rail profile topology of standard rail uic60, the standard wheel profile as per. This proposed model adapts the contact length, contact depth and incorporates possible partial and asymmetry of the contact due to defective wheel profile. Ensco has an internal team of vehicletrack interaction experts, who conduct. To solve the problem of wheelrail rolling contact of nonlinear steadystate curving, a threedimensional transient finite element fe model is developed by the explicit software ansyslsdyna. Pdf dynamics analysis of wheel rail contact using fea.
Modelling the contact between wheel and rail within multibody. Moreover, a comparison is also shown for the variation in the contact area, pressure and stress using finite element analysis. Interaction phenomena such as rolling, spinning and sliding can be included. A dynamic wheelrail impact analysis of railway track under wheel. The quasihertz method as well as a finite element fe method were included as basis of mathematical simulation. With these tools, distributions of contact zones for different angles of attack of the wheelsets were defined. 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. Home impressum legal information privacy statement how we. For the railway vehicles,flat damage on wheels is a very common defects,the sudden impact and vibration caused by flat damage on wheels endangers the wheels and the rail components a lot. The results are then transferred to the multibody simulation, resulting in a hybrid model consisting of rigid and elastic bodies. Damage mechanisms such as surface cracks, plastic deformation and wear can significantly reduce the service life of railway track and rolling stock. Dynamic responses of wheelrail systems with block dampers.
The optimality criteria formulated using the requirements to railway track and wheelset, are related to stability of wheelset, cost efficiency of. Pdf a robust finite element analysis of the railwheel. Professor in charge of thesis on behalf of the advisory committee approved. Foster rail technologies with the assistance of and permission from sahha 2015 technical workshop, birchwood hotel 8 october, 2015. The modeling tool and a methodology are described in the presented paper. This interaction also affects fuel consumption, derailment risk, and vehicle stability.
Analysis of wheelrail interaction for the development of a new tramway. The wheelrail interface is the contact area where wheelrail interaction between wheels and rails in railways takes place. The procedure has been developed by railway engineering group in delft university of technology. Fundamentals of wheelrail interaction michael roney consultant and retired chief engineer, canadian pacific dr. Wheelrail contact model for fe analysis contact between rail and wheel was modeled using abaqus master elements placed on the wheels and abaqus slave elements placed on the rails. Rail transit seminar wheel rail interaction conference. Additionally, ensco performs finite element analysis fea using ansys. The importance of wheelrail interface on energy savings. A rail wheel contact mechanism has been a keen interest area for railway engineers. Analysis of wheel rail interaction using fe software has been studied by sladkowski and sitarz 4. The dynamic interaction model of the trainbridge system is established, in which the rigidbody dynamics theory, finite element method and wheelrail displacement corresponding assumption are. Introducing the uks first tramtrain railway technology. A robust finite element analysis of the railwheel rolling contact. To improve the solving speed and efficiency, an explicitexplicit order solution method is put forward based on analysis of the features of implicit.
The time stepping is continued until mutual system convergence is achieved for the final time step fig. The cracking initiation and crack propagation processes that occur in rails as a result of contact between wheels and rails are described. Prediction of plastic deformation and wear in railway. Pdf dynamic analysis of wheelrail interaction using finite. Finite element analysis of the dynamic wheelrail response induced. Ansys software is utilized with the purpose of simulating the system. Finite element analysis framework for dynamic vehiclebridge. Sladkowski a, sitarz m 2005 analysis of wheelrail interaction using fe software, wear 25878 pp 12171223. Analysis of dynamic wheelrail interaction caused by measured.
Imperfections in the wheelrail contact are one of the main sources of generation of railway vibrations. Dynamic analysis of wheelrail interaction using finite. To simulate the 3d contact interaction analysis of railwheel, the. Cut spikes do not provide sufficient vertical rail restraint when subjected to high lateral forces.
Prediction of plastic deformation and wear in railway crossings comparing the performance of two rail. A vehicletrack interaction model incorporating a 2d roll. The finite element method analysis was carried out in abaqus software. Analysis of wheelrail interaction using fe software pdf. If you need to print pages from this book, we recommend downloading it as a pdf.
Wheelrail interaction, explicit finite element model. Causes of rail cant and controlling cant through wheelrail. Wu, and thompson 10 have investigated vibration analysis of railway track with multiple wheels on the rail. The maximum operating speed for realtime data analysis can now reach up to. Dynamic contact analysis of wheel and rail mechanism for obtaining maximum contact pressure author. The dynamic model of the vehicle body, a freight bogie and the truck systems of uic60 rail were modelled and analysed using an explicit method with a commercial fe software considering the real. Shevtsovnumerical analysis of the dynamic interaction between wheel set and turnout. Traintrack interaction tti is a classic research topic in railway engineering. Riding through rail crossings involves flange tips in formation of the contact with.
Wheel rail interface rail adhesion from wikipedia, the free encyclopedia. The model of the moving irregularity is much easier to use and it is currently utilized for the frequencydomain analysis 5. The issue of the wheelrail interaction may be solved in two different waysusing either the model of a moving irregularity between a stationary wheel and rail, or the model of a moving wheel along the rail. Interface journal the journal of wheelrail interaction.
An adaptive contact model for simulation of wheelrail impact. Study on dynamic simulation input form of locomotive wheel. Dynamics analysis of wheel rail contact using fea sciencedirect. A tool and a method for fe analysis of wheel and rail. A finite element analysis of the dynamic wheelrail response generated by the polygonization of the wheel tread was conducted based on a threedimensional wheelrail rolling contact model using ls. Mechanics of the railwheel contact is one of the fundamental areas of the. Aspects of rail infrastructure design springerlink. Therefore, wheelrail configurations examined are for the geometrical parameters like conicity, which varies from 1. This allowed wheel rail contact stress and wear rates to be minimised on both systems, while also maintaining safety against derailment. Olofsson, contact mechanics analysis of measured wheelrail profiles using the finite element method journal of rail and rapid transit, proc.
The sensitivity analysis allows gaining an image which describes a qualitative behaviour of such complicated system locomotive with respect to variable input parameters. The contact force vector is composed of a normal component, resulting from the weight of the vehicle, and by a tangential component resulting from the friction between the wheel and rail in the contact area. A key part of reducing railroad costs and improving. A change in designed surface topology may result from wear that brings in a wide change in contact geometry and stresses. It contains an introduction and the following papers. Analysis of wheelrail interaction for the development of a new. How many persons are working with problems regarding wheel rail interaction. They also have a negative impact on the rolling noise as well as on the riding comfort. Analysis of the wheelrail rolling contact fatigue of a highspeed train. Wheelrail interaction is one of the most important research topics in. Determination of wheelrail contact points in the simulation. We used computer software to determine the contact conditions such as rolling radius difference, and contact stress and angle, between the wheel and the rail profiles. Hence, the primary step investigates such mechanisms to clearly know the shape and size of the contact patch, and the distribution of the stresses within it.
Simulations of tramway dynamics were conducted using fivesection, lowfloor. Threedimensional elasticplastic finite element analysis for. A study on the wheel rail interaction at switch points to reduce derailments in turnouts by samet ozturk approved. Jul, 2017 sladkowski a, sitarz m 2005 analysis of wheelrail interaction using fe software, wear 25878 pp 12171223.
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