Problems of nondestructive testing of wheel-pair components of rolling stock

Objective: To develop the method to monitor the technical condition of the railway track. Me-thods: A strain-gauge wheel pair is used for continuous recording of vertical and lateral interaction forces in a dynamic wheel–rail system. Results: Stability margin factors of a wagon relative to de-railment have been determined and the defective (prone to derailment) sections of a railway track have been identified with the exact identification of their location (GPS coordinates) on the map using navigation devices. Practical importance: The developed monitoring method makes it possi-ble to promptly re¬gister and eliminate railway track defects

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Measurement of wheel pair parameters of a rolling stock during movement

10.1117/12.501376 ◽

2003 ◽

Cited By ~ 1

Author(s):

Anatoli Z. Venediktov ◽

Vladimir N. Demkin ◽

Dmitri S. Dokov ◽

V. N. Tireshkin

Keyword(s):

Rolling Stock ◽

Wheel Pair

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Mathematical Justification of the New Method of Determination of Wheel Pair’s and Rail’s Damage

ASME 2009 Rail Transportation Division Fall Technical Conference ◽

10.1115/rtdf2009-18007 ◽

2009 ◽

Author(s):

Nikoloz Mgebrishvili ◽

Guri Sharashenidze ◽

Manana Moistsrapishvili ◽

Sergo Sharashenidze ◽

Liana Kuparashvili ◽

...

Keyword(s):

Mathematical Model ◽

Mobile Device ◽

Traffic Safety ◽

Economic Effect ◽

Rolling Stock ◽

Wheel Pair ◽

Railway Traffic ◽

Accuracy Of Measurement ◽

Mathematical Justification

Development of modern railways largely depends on the control of intactness of the wheel pairs and rails. It is impossible to ensure safety and increase the speed of railway traffic without providing such control. Detection of the wheel pairs’ and rails’ wear and damage is one of the key problems of railway science. Many scientific works are accomplished and lot of devices are elaborated in this field, but the mentioned problem still remains urgent. In order to increase the traffic safety, the group of authors has proposed a constructional scheme of the mobile device for detection of wheel pairs’ and rails’ wear and damage, which will have increased accuracy of measurement. Increasing of accuracy of measurement is carried out on the basis of development of mathematical model, which provides the realization of equal wear of wheel pairs’ as well as ones no equal wear. By installation of the proposed device on each wheel pair of each railcar of the rolling stock, the automatic control of wheel pairs’ and rails’ condition will be achieved. Namely: -Detection of the worn out wheel pair and determination of wear degree; -Detection of the damaged wheel pair; -Identification of the worn out or damaged wheel pair. Besides, on the basis of elaborated mathematical model: -Detection of the worn out rail; -Detection of the damaged rail; -Identification of location of the worn out or damaged rail. The obtained information will be constantly connected to the locomotive computer system. Therefore, for checking rolling stocks, there will no longer be need to build expensive stationary systems, to move trains great distances for their inspection and in the result, the time lost for stoppage will be saved. So, with the help of proposed mobile device, the traffic safety increases and at the same time expenses for detection of wheel pairs’ wear and damage decrease, which results in significant economic effect.

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INVESTIGATION THE INDICATORS OF THE MOVEMENT STABILITY OF ROLLING STOCK ON THE RAILWAYS OF THE EUROPEAN UNION COUNTRIES

Criminalistics and Forensics ◽

10.33994/kndise.2019.64.54 ◽

2019 ◽

pp. 580-588

Author(s):

A. Batih

Keyword(s):

European Union ◽

Traffic Safety ◽

The Body ◽

Transport Infrastructure ◽

Stock Index ◽

Rolling Stock ◽

The European Union ◽

Wheel Pair ◽

Rail Head ◽

The Eu

The countries of the European Union have a huge territory and a large number of objects of transport infrastructure and rolling stock. In these countries, various methods, complex systems and technologies are offered for the organization and management of the cargo transportation process and passengers with traffic safety. The acceptance and admission of rolling stock to operation is carried out in accordance with the requirements set out in document EN 14363. This document defines the main indicators of railway traffic safety, methods, means and conditions for conducting tests of rolling stock on the definition of its qualitative driving characteristics. In the author’s article, the following safety indicators were studied on the EU railways: the coefficient of stability from rolling the wheel flange of the wheel pair onto the rail head, the value of the turning of the trolley relative to the body of the rolling stock (index X), the indicator of the lateral action of the rolling stock on the rails. The stability of the rolling of the wheel of the wheel pair onto the rail head on the EU railways is investigated on the basis of the Nadal’s criterion. The value of the resistance of the trolley rotation relative to the body of the rolling stock is decisive for proving the safety condition against the derailment wheel pairs on the EU railways. With the help of the indicator of the lateral action of the rolling stock on the rails limited the size of the lateral forces to minimize the risk of shifts of rail-sleeper lattice. The article describes how a rolling stock test on EU railways is being conducted to determine the traffic safety indicators. The author notes that in order to determine the possibility of derailment of rolling stock under the norm EN 14363, it is necessary to have the value of the guiding force. However, determining the direction of the force is a complicated and time-consuming process, since it requires a large number of experimental studies. Key words: railways, rolling stock, indicators of sustainability, European Union.

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Research of safety indicators of diesel train movement with two-stage spring suspension

MATEC Web of Conferences ◽

10.1051/matecconf/201823405003 ◽

2018 ◽

Vol 234 ◽

pp. 05003 ◽

Cited By ~ 4

Author(s):

Andriy Kuzyshyn ◽

Andriy Batig ◽

Sergei Kostritsa ◽

Julia Sobolevska ◽

Vitalii Kovalchuk ◽

...

Keyword(s):

Traffic Safety ◽

Motor Vehicle ◽

Stability Margin ◽

Accurate Method ◽

Railway Track ◽

Rolling Stock ◽

Operational Parameters ◽

Wheel Pair ◽

Rail Track ◽

Safety Parameters

The problem of the interaction of rolling stock with the rail track has been analyzed in the present paper. It has been established that in the process of transport science development a number of methods for determining the causes of wheel pairs derailment are developed, which, in a varying degree, take into account the peculiarities of their interaction. The problem of choosing the most accurate method for estimating the causes of rolling stock derailment becomes more complicated because of the lack of sufficient experimental data that would allow us to verify the adequacy of the models. The indicators of stability of the wheel against derailment, which are used on the railways of Ukraine and Europe, have been examined. Their dependences on the speed of movement were derived. It has been established that the increase of the speed of motion leads to the increase of the interaction power of the rolling stock with the rail track, which may, under certain operational parameters, provoke its derailment. As a result of the calculations, it has been shown that the use of norms for car design and calculation used on Ukrainian railways can lead to an inadequate estimation of traffic safety parameters, since it does not take into account the unevenness of the railway track. It has been established that the requirements of BS EN 14363: 2005 European norms are stricter in comparison with the norms for calculation and evaluation of the bearing elements strength and dynamic qualities of motor-vehicle rolling stock used on Ukrainian railways. A comparison of the experimentally and theoretically calculated values of the stability margin coefficient against wheel derailment of the first wheel pair of the diesel train car was carried out.

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Measurement of Residual Stresses of Locomotive Wheel Treads During the Manufacturing Technological Cycle

Management Systems in Production Engineering ◽

10.1515/mspe-2019-0037 ◽

2019 ◽

Vol 27 (4) ◽

pp. 236-241

Author(s):

Vitaly V. Muravev ◽

Olga V. Muraveva ◽

Ludmila V. Volkova ◽

Milan Sága ◽

Zuzana Ságová

Keyword(s):

Residual Stresses ◽

Stress Measurement ◽

The State ◽

Rolling Stock ◽

Wheel Pair ◽

State Of Stress ◽

Technological Cycle ◽

Wheel Drive ◽

Pulling Force ◽

Simple Assembly

AbstractThe production of two-wheeled rolling stock represents, at first glance, a simple assembly process that significantly affects the overall functionality and safety of the vehicle. This is due to residual stresses that arise after assembly by pressing the wheel on the axle. The state of stress after assembly remains in the design has a decisive influence on the load-bearing capacity of the two-wheel drive, its lifespan but also the transfer of the pulling force in the case of locomotives. Therefore, it is very important to find suitable methods for determining residual stresses. Numerical and experimental approaches are already in place to gain information on the state of stress after compression, or during a real operation. The developed techniques and tools for estimation of residual stresses in locomotive wheel treads based on the acoustoelasticity effect using electromagnetic acoustic transformation are described in the paper. The original results of residual stress measurement in the treads during a technological cycle of locomotive wheel pair manufacturing are presented.

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THERMAL CONTROL INVESTIGATION OF ROLLING-STOCK SHOE BRAKES BY SIMULATION METHOD

Bulletin of Bryansk state technical university ◽

10.30987/1999-8775-2020-4-31-42 ◽

2020 ◽

Vol 2020 (4) ◽

pp. 31-42

Author(s):

Pavel Shalupin

Keyword(s):

Thermal Loading ◽

Time Moment ◽

Thermal Control ◽

Simulation Method ◽

Control Area ◽

Rolling Stock ◽

Maximum Temperature ◽

Wheel Pair ◽

Brake Application ◽

Thermal Diagnostics

The development of heavy speed freight train communications in the Russian Federation results in the increased thermal loading of braking system elements of rolling-stock, in particular, in shoe brakes. Taking into account the requirements of branch program documents on wheel life increase, it is evident that the further development of freight communications requires a complex application of thermal diagnostics means for auto-brake equipment of rolling-stock during a train motion. The statistics shows that the fifth part of wheel pair failures is connected with thermal-mechanical damages and the situation goes on to be aggravated. In view of this hardware and software means for thermal diagnostics of shoe brakes require further improvement. The purpose of this paper is the process investigation of shoe brake thermal control by method of computer simulation and the estimate of infrared optics position impact upon control results. There is considered a model for the definition of a scanning path and computation of a signal level being part of a complex simulation model of wheel thermal control. The model offered is based on the methods of solid dynamics system investigations in the basis of which there is an application of theorems on mass center motion and changes of a solid kinetic moment. The model is used for finding a form and a spot area at every time moment of scanning by a solution of a problem on a dynamic spatial intersection of a wheel surface with the control area. There are considered different versions of optics orientation to an object of control for each of which for the first time there are obtained calculated thermal signals from the object under control. The analysis has shown that at the optics orientation to wheels from the outside a wheel tread appears to be in the control area that allows defining a maximum temperature of a wheel. But at the realization of emergency brake application a sharp short-time temperature increase of a tread is possible which indicates an improper operation of a brake unit. The optics orientation to a wheel from its inner side allows excluding false alarm indices at emergency brake application. The correctness of the results shown in the paper is confirmed by convergence with the results of wheel heating monitoring and environmental tests of experimental complexes of thermal control means of shoe brakes.

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Increase of Railway Transportation Safety by a New Method of Determination of Wheel Pair and Rail Wear and Damage

ASME 2007 Rail Transportation Division Fall Technical Conference ◽

10.1115/rtdf2007-46024 ◽

2007 ◽

Author(s):

Nikoloz Mgebrishvili ◽

Marina Tatanashvili ◽

Tengiz Nadiradze ◽

Ketevan Kekelia

Keyword(s):

Mobile Device ◽

Transportation Safety ◽

Rolling Stock ◽

Railway Transportation ◽

Wheel Pair ◽

Railway Traffic ◽

Rail Wear ◽

Railway Safety ◽

Wear Damage

As a result of interaction between the wheel pairs and rails during rolling stock movement, lateral, longitudinal and torsional creep forces are created. Over the long term these forces cause wear and damage of the wheel pairs and rails. Accordingly railway safety decreases and the probability of derailment increases. Development of modern railways largely depends on controlling the proper functionality of wheel pairs and rails. It is impossible to ensure safety and increase the speed of railway traffic without providing such control. Detection of the wheel pair and rail wear damage is one of the key problems of railway science. Many scientific studies have been performed and a number of devices have been developed in this field, but the mentioned problem still remains urgent. In order to increase railway safety, the authors of this paper have proposed a conceptual design of a mobile device for detection of wheel pair and rail wear and damage. Such a device does not currently exist. By installation of the proposed device on each wheel pair of each railcar, the automatic control of wheel pair and rail condition will be achieved. Namely: • Detection of the worn out wheel pair and determination of the degree of wear; • Detection of the damaged wheel pair; • Identification of the worn out or damaged wheel pair. Also possible, on the basis of elaborated mathematical model: • Detection of the worn out rail; • Detection of the damaged rail; • Identification of location of the worn out or damaged rail. Information obtained from the device would be constantly connected to the locomotive computer system. Therefore, for checking rolling stock, there could no longer be a need to build expensive stationary systems or to move trains great distances for their inspection. As a result, the time lost due to equipment stoppage will be saved. Also, with the help of the proposed mobile device, railway safety could improve, while at the same time expenses for detection of wheel pair wear and damage could potentially decrease. This could result in significant economic savings.

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Equivalent conicity and its influence on rolling-stock operation

Proceedings of Petersburg Transport University ◽

10.20295/1815-588x-2017-2-247-255 ◽

2017 ◽

pp. 247-255

Author(s):

Artem Kyselev ◽

Lyudmila Blazhko ◽

Andrey Romanov

Keyword(s):

High Speed ◽

Practical Importance ◽

Railway Track ◽

Rolling Stock ◽

Functional Dependencies ◽

Wheel Pair ◽

Wheel Rolling ◽

High Speed Trains ◽

Force Reduction ◽

Equivalent Conicity

Objective: To identify the rolling-stock stability, force reduction, emerging in the process of wheel-rail interaction, the reduction of wheel thread and wheel flange wear, horizontal wear during high-speed running. To consider issues of wheel-rail interaction, that is the influence of a wheel pair equivalent conicity on rolling stock operation. Lateral motion of a wheel pair about an axis of a track in accordance with conicity parameters occurs in the process of standard tapered wheel-rail interaction. Methods: Calculation methods of equivalent conicity and basic assumptions in design diagram were presented. The main functional dependencies of equivalent conicity were determined. “All-purpose mechanism” bundled software, developed on the basis of FastSim algorithm introduced by G. Kalker, was applied for modeling of wheel pair operation on a railway track. Results: Interaction of VNIIZhT-RM-70 wheel for “Sapsan” high-speed trains with R65 rail type was studied, as well as UIC60 rail type used on European railroads. Wheel rolling occurs in different circumferential directions in case of lateral movement of a wheel pair Oscillating motion was described, as well as the parameters on the basis of which equivalent conicity is formed. Practical importance: The necessity in reduction of equivalent conicity to efficiency parameters of high-speed running realization on Russian railroads was revealed by means of modeling.

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INVESTIGATION THE INFLUENCE DIFFERENCE OF THE WAGON’S WHEELS DIAMETERS ON ITS DERAILMENT BY QUASI-DYNAMICS METHOD

Criminalistics and Forensics ◽

10.33994/kndise.2019.64.57 ◽

2019 ◽

pp. 608-614

Author(s):

A. Kuzyshyn

Keyword(s):

Lateral Force ◽

The Body ◽

Rolling Stock ◽

Wheel Pair ◽

Rail Head ◽

Rolling Surface ◽

Significant Difference ◽

Negative Effect ◽

The Difference ◽

Dynamics Method

In the article the author notes that the horizontal forces arising in the process of pressing the wheel flanges to the working edge of the rail, under certain conditions can be very significant. These forces, in combination with the wheel unloading, caused by the geometric deviation of the track in the plan and profile, can lead to rolling the wheel of the wheelset onto the rail head and, as a consequence, to the stock derailment. Such pressing of the wheel to the rail head in the straight part of the track can occur when faults in the running gears of the wagons: non-parallelism of the axles of the wheel pairs of the bogie frame by the difference in the bases of the side frames, wear of the guide axle-box openings; the difference of the flanges on one wheel pair is more than permissible, wear of the body and bogie bolster center plates, step bearing; a significant difference in the diameters of the wheels of the wheelset caused by the intense wear of the rolling surface of one of them, etc. The article deals with the investigation of the influence of the wheels’ diameters difference of the wheelset on the amount of lateral force for the empty and loaded state of the rolling stock wagon. The results obtained made it possible to conclude that an increase in the wheels’ diameters difference of the wheelset of a loaded wagon of rolling stock leads to more intensive growth of the lateral force, as compared with the exhaust. This is caused by the linear dependence of the lateral force on the mass of the wagon of the rolling stock. However, for both the empty and the loaded wagon, the increase in the lateral force value has a negative effect. In conjunction with the unloading of the wheel it increases the probability of rolling in the wheel of the wheelset on the rail head. Also, an increase in the action of the lateral force from the wheelset on the rail, causes increased wear of the rail, the wheel flange, which is pressed. At the same time, rolling surfaces of an irregular shape are formed on the surface of the other wheel. Therefore, it is important to ensure the maintenance of the wheels of a wheel pair with the smallest difference in its diameters. Key words: rolling stock, diameter difference of wheels, quasi-dynamics method.

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