Analysis of rolling contact fatigue damage initiation at the wheel. The quasihertz method as well as a finite element fe method were included as basis of mathematical simulation. Also, this book does not cover rail vehicle dynamics and wheelrail contact. 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. Napolitano department of industrial engineering university of naples federico ii via claudio, 80, 80034 naples italy massimo. Study on wheelrail interaction based on rail roughness. Analysis of railway wheel to study thermal and structural. Dynamic responses of wheelrail systems with block dampers. There are enormous challenges before indian railways 1. 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. A complex dynamic analyses using adamsrail are being applied for one.
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. 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. Analysis of wheelrail interaction using fe software has been studied by sladkowski and sitarz4. Instrumented study of the wheelrail interaction jve. 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. Application of a computational tool to study the influence.
Wheelrail contact using a 3d finite element model and its comparison with analytical methods. 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. Wiest and kassa assessed four models for wheelrail rolling contact at a given cross section in the crossing panel of a selected turnout. Ttcis scientific software suite and nucars overview rosa p. 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. 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. 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. 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. An interactive method for the analysis of the simulation of vehiclebridge coupling vibration using. Professional software analytic calculation 3d finite element wheel. Multibody vehicletrack dynamic interaction simulation. The analysis of the wheelrail combination has determined that twopoint contact is the main cause of the high flange and rail wear. Apple actively and aggressively enforces its intellectual property rights to the fullest extent of the law.
The work is presented in the five appended papers that are summarised below. On new effects of wheelrail interaction springerlink. To increase train speeds for heavy haul prevent undue wear reduce costs safety, guidance and stability of vehicle passenger comfort energy efficiency environment. Analysis of the wheelrail adhesion characteristic using. 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. Fundamentals of wheelrail interaction michael roney consultant and retired chief engineer, canadian pacific dr. Fibre bragg grating fbg sensors have been installed along an existing line for the purposes of train detection and weight measurement. Wheelrail interaction is one of the most important research topics in railway engineering.
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. Wheelrail contact simulation is one of the most complicated problems in the modeling of railway vehicles. The wheelrail interaction plays a unique role in rail vehicle dynamics. This interaction affects the occupants crash kinematics behaviour that ultimately. The interaction force between wheel and rail is generated by their roughness. The transient wheel forces are often due to wheel or rail abnormalities.
The importance of wheelrail interface management on energy savings and sustainability railroad wheels and rails are made of high strength steel. Dynamic analysis of wheelrail interaction using finite element method. Sladkowski, aleksander and sitarz, marek, analysis of wheelrail interaction using fe software. This approach allows simulating the vehicle, including the masses and inertias of the structural elements and the characteristics of sus pensions. As an excitation source of the train vibration, rail surface roughness has significantly impact on the wheelrail interaction. This research is divided into four objectives as follows. Analyses on wheelrail contact using finite element method during passing through curved track abstract. Analysis of wheelrail interaction using fe software analysis of wheelrail interaction using fe software sladkowski, aleksander. The results show fair accuracy and high resolution on the vertical force acted on track when the train wheels are rolling upon. 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. This study presents the analysis on the unique signatures from the data collected to characterise wheelrail interaction for rail defect detection. Abstract wheelrail systems are intensively subjected to damage caused by rolling contact and slip behaviour between the wheel and the rail. Motraghi a, marinov m 2012 analysis of urban freight by rail using event. Aleksander sladkowski, marek sitarzanalysis of wheelrail interaction using fe software. A dynamic wheelrail impact analysis of railway track. 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.
The wheelrail interaction plays a unique role in r ail vehicle dynamics. Three types of wheels are considered with different contact stiffness and wheelplate design. A tool and a method for fe analysis of wheel and rail. Modeling of energy processes in wheelrail contacts. Modeling of subsurface cracking in railroad wheels 2. Rolling noise is a relevant source in railway applications. The solid model of railwheel contact model is created in catia v5. Interaction between moving vehicles and railway track at high speed prof. Dynamic analysis of wheelrail interaction using finite. Analytical approach to vibration analysis of the wheel. Interface journal the journal of wheelrail interaction. Exemplary simulation of freight car interaction with track.
New wheel and good switch point interaction for the analysis of chipping. Damage mechanisms such as surface cracks, plastic deformation and wear can significantly reduce the service life of railway track and rolling stock. Using the robust finite element software strand7, the finite element model of the. A sciencebased approach to improved wheel rail interaction.
With these tools, distributions of contact zones for different angles of attack of the. Kevin oldknow chief engineer, wheelrail interface l. This interaction is a specialist subject covering the design and management of the very high stresses in the small contact area. Signature analysis on wheelrail interaction for rail. Stressstrain analysis for the wheelrailtrack assembly at urban passenger transport. Wheel rail interaction based on roughness calculation. Signature analysis on wheelrail interaction for rail defect detection abstract. Numerical simulations of curving with a full vehicle model using multibody dynamics software were carried out, and according to the comparison with measured data. The influence of contact forces on the deformation. Modelling and simulation of dynamic wheelrail interaction.
Analysis of wheelrail interaction using fe software. An interactive method for the analysis of the simulation of vehicle. Analyses on wheelrail contact using finite element method. 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. This is caused because of the brake block pushed against the wheel tread to create friction through which. This allowed bt to propose a new rail profile with another inclination and a slightly larger track gauge. Vibratec is able to meet client needs for calculation, maintenance programs and rail equipment monitoring using the following suite of complete solutions. Safety and economy of railway traffic is enormously influenced by the contact stress variation caused by wheel rail contact profile changes. Rail transit seminar wheel rail interaction conference 2017. 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. Finite element analysis of the wheelrail impact behavior.
The wheelrail contact has been of crucial interest to the railway engineers. Wheel and rail surfaces are not perfectly flat, they have a lot of small micro imperfections due to usage, damages. Mechanics of the railwheel contact is one of the fundamental areas of the. Apple works closely with the software and information. 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. They also have a negative impact on the rolling noise as well as on the riding comfort. Analysis of rail wheel contact stresses by using ansys ansys is finite element analysis software which enables engineers to perform the following tasks. Part 1 3 the wheel rail interface anatomy and key terminology the contact patch and contact pressures creepageand traction forces. 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. Olofssoncontact mechanics analysis of measured wheelrail profiles using the finite element method. In order to study the effect of rail roughness on wheelrail vibration load, the wheelrail interaction model is established based on. The wheelrail interface is the contact area where wheelrail interaction between wheels and rails in railways takes place. Analysis of wheelrail interaction using fe software, wear. If you need to print pages from this book, we recommend downloading it as a pdf.
Appendix a effect of wheelrail profiles and wheelrail. 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. Continuous observation of wheel rail contact forces in. This course explains how to use modeling elements to simulate railwheel.
It involves track impact response, track vibration and track safety. It is thus motivated to perform an indepth study on the performance i. Effects of rail cant on wheelrail contact forces in slab. 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. 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. A steel wheel requires very little energy to roll on a steel rail.
Online calculation of wr contact using kalkers nonlinear theory. Even with the computer power one has today, its mathematical modeling employs the versatile numerical analysis method, the finite element method fem. Simulated results for a vehicle in a turnout are shown as an example. Analysis of wheelrail interaction using fe software has been studied by sladkowski and sitarz 4. Focus of this first stage of work is placed on the repeatability of signals from the same wheelrail interactions while the rail is. Legal information terms of use privacy policy piracy prevention contact. In this paper, the effect of geometrical parameters on the behaviour of dynamic interaction of wheelrail is being investigated through a parametric study. Foster rail technologies with the assistance of and permission from sahha 2015 technical workshop, birchwood hotel 8 october, 2015. Author links open overlay panel aleksander sladkowski marek sitarz. This crossdisciplinary seminar will include presentations from experts in vehicletrack dynamics, noise and vibration, wheelrail profile design and maintenance, and friction management.
Rail cant parameter, applied in order to attain suitable movement of wheel on rail, directly influences in dynamic interaction of trackvehicle. Contact stress analysis in rolling bodies by finite. To study the influence of interacting wheel and rail profile topology of standard rail uic60, the standard wheel profile as per. Vehiclebridge coupling vibration is a complicated interaction. Wheel rail interaction based on roughness calculation m. A change in designed surface topology may result from wear that brings in a wide change in contact geometry and stresses. Contact mechanics analysis of measured wheelrail profiles using the finite element method all machine elements working in contact are subject to various degradation mechanisms. The customer had to replace the rails with new ones on this curvy track section.
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