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. Wheelrail contact using a 3d finite element model and its comparison with analytical methods. An efficient interaction between the vehicle and the track can support large loads per axle, and an inappropriate design and maintenance of the wheelrail interface can bear to a fast degradation of the system components and put in. Signature analysis on wheelrail interaction for rail. The wheelrail interaction plays a unique role in rail vehicle dynamics. Analysis of wheelrail interaction using fe software has been studied by sladkowski and sitarz 4. Kevin oldknow chief engineer, wheelrail interface l. Analyses on wheelrail contact using finite element method during passing through curved track abstract. Author links open overlay panel aleksander sladkowski marek sitarz. Interface journal the journal of wheelrail interaction. The influence of contact forces on the deformation. Appendix a effect of wheelrail profiles and wheelrail. Mechanics of the railwheel contact is one of the fundamental areas of the.
Aleksander sladkowski, marek sitarzanalysis of wheelrail interaction using fe software. Dynamic responses of wheelrail systems with block dampers. This allowed bt to propose a new rail profile with another inclination and a slightly larger track gauge. 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. Abstract wheelrail systems are intensively subjected to damage caused by rolling contact and slip behaviour between the wheel and the rail. In order to study the effect of rail roughness on wheelrail vibration load, the wheelrail interaction model is established based on. Damage mechanisms such as surface cracks, plastic deformation and wear can significantly reduce the service life of railway track and rolling stock. Stressstrain analysis for the wheelrailtrack assembly at urban passenger transport. A change in designed surface topology may result from wear that brings in a wide change in contact geometry and stresses. 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.
Napolitano department of industrial engineering university of naples federico ii via claudio, 80, 80034 naples italy massimo. Analysis of rolling contact fatigue damage initiation at the wheel. Wheel rail interaction based on roughness calculation. Motraghi a, marinov m 2012 analysis of urban freight by rail using event. Using the robust finite element software strand7, the finite element model of the. Signature analysis on wheelrail interaction for rail defect detection abstract. Three types of wheels are considered with different contact stiffness and wheelplate design. Analysis of railway wheel to study thermal and structural. Contact mechanics analysis of measured wheelrail profiles using the finite element method all machine elements working in contact are subject to various degradation mechanisms. Part 1 3 the wheel rail interface anatomy and key terminology the contact patch and contact pressures creepageand traction forces. Dynamic analysis of wheelrail interaction using finite. It involves track impact response, track vibration and track safety.
Track structure failures caused by wheelrail impact forces can lead to significant economic loss for track owners through damage to rails and to the sleepers beneath. This paper is a revised and expanded version of an article entitled, contact stress analysis in wheelrail by hertzian method and finite element method presented in national conference on recent advancements in mechanical engineering held at north east regional institute of science and technology, arunachal pradesh. The analysis of the wheelrail combination has determined that twopoint contact is the main cause of the high flange and rail wear. This approach allows simulating the vehicle, including the masses and inertias of the structural elements and the characteristics of sus pensions. Analyses on wheelrail contact using finite element method.
The interaction force between wheel and rail is generated by their roughness. The work is presented in the five appended papers that are summarised below. This research is divided into four objectives as follows. Analysis of the wheelrail adhesion characteristic using. Analysis of wheelrail interaction using fe software has been studied by sladkowski and sitarz4. This is caused because of the brake block pushed against the wheel tread to create friction through which. This study presents the analysis on the unique signatures from the data collected to characterise wheelrail interaction for rail defect detection. The commercial software uses a multibody formulation to simulate the dynamic performance of integrated railway systems that include the vehicle, the track and the wheelrail contact interaction 18. Apple actively and aggressively enforces its intellectual property rights to the fullest extent of the law. Multibody vehicletrack dynamic interaction simulation. Effects of rail cant on wheelrail contact forces in slab. Contact stress analysis in rolling bodies by finite element method fem statically vahid monfared department of mechanical engineering, zanjan branch, islamic azad university, zanjan, iran. To study the influence of interacting wheel and rail profile topology of standard rail uic60, the standard wheel profile as per.
Foster rail technologies with the assistance of and permission from sahha 2015 technical workshop, birchwood hotel 8 october, 2015. 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. The threedimensional elastic frictional finite element model of the wheelrail interaction is put forward to investigate effect of the curve radius and superelevation on the contact stress and contact force of the rail. A sciencebased approach to improved wheel rail interaction. The wheelrail interface is the contact area where wheelrail interaction between wheels and rails in railways takes place. The solid model of railwheel contact model is created in catia v5. Dynamic analysis of wheelrail interaction using finite element method. The wheelrail impact response induced by a wheel flat for highspeed trains is simulated numerically, based on the strain ratedependent constitutive parameters of wheelrail materials, using the finite element software lsdyna explicit algorithm. Legal information terms of use privacy policy piracy prevention contact. Finite element analysis of the wheelrail impact behavior. Rail transit seminar wheel rail interaction conference 2017.
Professional software analytic calculation 3d finite element wheel. Introduction modelling and simulation of wheelrail interaction using a scale roller rig is necessary for better understanding of dynamic behaviour of the railway vehicle in a controlled laboratory environment less prone to noise and disturbances. Study on wheelrail interaction based on rail roughness. Ttcis scientific software suite and nucars overview rosa p. The wheelrail contact has been of crucial interest to the railway engineers. Through mathematical analysis it is possible to build a deep and functional understanding of the wheelrail in terface, suspension and suspension component behavior, simulation and testing of mechanical systems interaction with surrounding infrastructure, noise and vibration. An interactive method for the analysis of the simulation of vehicle. Vehiclebridge coupling vibration is a complicated interaction. This crossdisciplinary seminar will include presentations from experts in vehicletrack dynamics, noise and vibration, wheelrail profile design and maintenance, and friction management. A complex dynamic analyses using adamsrail are being applied for one. Analysis of rail wheel contact stresses by using ansys ansys is finite element analysis software which enables engineers to perform the following tasks. Even with the computer power one has today, its mathematical modeling employs the versatile numerical analysis method, the finite element method fem. Analysis of wheelrail interaction using fe software, wear. Wheelrail interaction is one of the most important research topics in railway engineering.
The rolling noise is generated by the contact force the wheel, and the rail, exchange each other during relative motion. Providing high quality software and training services to enable our customers to. Fundamentals of wheelrail interaction michael roney consultant and retired chief engineer, canadian pacific dr. Instrumented study of the wheelrail interaction jve. Wiest and kassa assessed four models for wheelrail rolling contact at a given cross section in the crossing panel of a selected turnout. Fibre bragg grating fbg sensors have been installed along an existing line for the purposes of train detection and weight measurement. Wheelrail contact simulation is one of the most complicated problems in the modeling of railway vehicles. The customer had to replace the rails with new ones on this curvy track section. Exemplary simulation of freight car interaction with track. This course explains how to use modeling elements to simulate railwheel. The results show fair accuracy and high resolution on the vertical force acted on track when the train wheels are rolling upon. In this paper, the dynamic re sponse of the wheel on irregular rail track is analyzed wi th analytical approach using the method of multiple scales mms. Focus of this first stage of work is placed on the repeatability of signals from the same wheelrail interactions while the rail is. New wheel and good switch point interaction for the analysis of chipping.
Modelling and simulation of dynamic wheelrail interaction. The importance of wheelrail interface management on energy savings and sustainability railroad wheels and rails are made of high strength steel. The transient wheel forces are often due to wheel or rail abnormalities. Continuous observation of wheel rail contact forces in.
In this paper, the dynamic response of the wheel on irregular rail track is analyzed with analytical approach using the method of multiple scales mms. Analysis of wheelrail interaction using fe software analysis of wheelrail interaction using fe software sladkowski, aleksander. Rolling noise is a relevant source in railway applications. 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. Also, this book does not cover rail vehicle dynamics and wheelrail contact. As an excitation source of the train vibration, rail surface roughness has significantly impact on the wheelrail interaction. Kok professor of railway engineering tu delft, the netherlands associate professor of railway engineering tu delft, the netherlands abstract a numerical method was proposed for the analysis of vertical track behaviour as a result of moving.
The rail transit seminar is devoted to examining wheelrail and vehicletrack interaction on light rail and subway operations. The wheelrail interaction plays a unique role in r ail vehicle dynamics. A steel wheel requires very little energy to roll on a steel rail. This interaction affects the occupants crash kinematics behaviour that ultimately. To increase train speeds for heavy haul prevent undue wear reduce costs safety, guidance and stability of vehicle passenger comfort energy efficiency environment. Modeling of subsurface cracking in railroad wheels 2.
Wheelrail contact simulation is one of the most co mplicated problems in the modeling of railway vehic les. Analysis of wheelrail interaction using fe software. If you need to print pages from this book, we recommend downloading it as a pdf. There are enormous challenges before indian railways 1. Wheel and rail surfaces are not perfectly flat, they have a lot of small micro imperfections due to usage, damages. Vibratec is able to meet client needs for calculation, maintenance programs and rail equipment monitoring using the following suite of complete solutions. A tool and a method for fe analysis of wheel and rail interaction tanel telliskivi, ulf olofsson, ulf sellgren and patrik kruse machine elements, department of machine design. Analytical approach to vibration analysis of the wheel. Application of a computational tool to study the influence. Apple works closely with the software and information.
Online calculation of wr contact using kalkers nonlinear theory. A dynamic wheelrail impact analysis of railway track. In this paper, the effect of geometrical parameters on the behaviour of dynamic interaction of wheelrail is being investigated through a parametric study. Modeling of energy processes in wheelrail contacts. Wheel rail interface monash institute of railway technology.
Contact stress analysis in rolling bodies by finite. Interaction between moving vehicles and railway track at high speed prof. They also have a negative impact on the rolling noise as well as on the riding comfort. A successful methodology is presented for simulating back of flange contact in turnouts and special track work in the nucars vehicletrack interaction multibody simulation program. It is thus motivated to perform an indepth study on the performance i. Without having an appropriate understanding of the wheelrail interaction, the essential safety analysis of stability and derailment or the ride comfort analysis are incomplete 2. The quasihertz method as well as a finite element fe method were included as basis of mathematical simulation. This interaction is a specialist subject covering the design and management of the very high stresses in the small contact area. Olofssoncontact mechanics analysis of measured wheelrail profiles using the finite element method. Rail cant parameter, applied in order to attain suitable movement of wheel on rail, directly influences in dynamic interaction of trackvehicle. Wheel rail interaction based on roughness calculation m.
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