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

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.

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

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.

scholarly journals Methods of determination of forces in the “wheel-rail” system

2018 ◽  
Vol 216 ◽  
pp. 03009
Author(s):  
Tatyana Sych ◽  
Andrey Kolomeets
Keyword(s):  
Numerical Method ◽  
Control Method ◽  
Heavy Traffic ◽  
Model Verification ◽  
Transportation Safety ◽  
Rolling Stock ◽  
Methods Of Determination ◽  
Rail System ◽  
Dynamic Forces

Increase in the volume of heavy traffic on railways updates the requirements for ensuring transportation safety in conditions of continuous increasing in axle loads on the track. The purpose of the study is to review methods for determining the dynamic forces arising from interaction between the wheel and the rail during rolling stock movement. The numerical method is used to determine the values of relative strain of the rail web at the transducers locations. Model verification and estimation of the calculation accuracy for several methods of determining forces in the “wheel-rail” system has been performed. Methods for determining the loads arising in the wheel and rail system, as well as the results of calculating the three load components were obtained. Simulation tests of the proposed forces control method have been performed.

Tribology of rail bogie

2018 ◽  
Vol 77 (4) ◽  
pp. 230-240
Author(s):  
D. P. Markov
Keyword(s):  
Contact Fatigue ◽  
Basic Element ◽  
Difficult Problem ◽  
Railway Track ◽  
Rolling Stock ◽  
Kinematic Parameters ◽  
Approximate Estimation ◽  
Railway Bogie ◽  
Classical Calculation

Railway bogie is the basic element that determines the force, kinematic, power and other parameters of the rolling stock, and its movement in the railway track has not been studied enough. Classical calculation of the kinematic and dynamic parameters of the bogie's motion with the determination of the position of its center of rotation, the instantaneous axes of rotation of wheelsets, the magnitudes and directions of all forces present a difficult problem even in quasi-static theory. The paper shows a simplified method that allows one to explain, within the limits of one article, the main kinematic and force parameters of the bogie movement (installation angles, clearance between the wheel flanges and side surfaces of the rails), wear and contact damage to the wheels and rails. Tribology of the railway bogie is an important part of transport tribology, the foundation of the theory of wheel-rail tribosystem, without which it is impossible to understand the mechanisms of catastrophic wear, derailments, contact fatigue, cohesion of wheels and rails. In the article basic questions are considered, without which it is impossible to analyze the movement of the bogie: physical foundations of wheel movement along the rail, types of relative motion of contacting bodies, tribological characteristics linking the force and kinematic parameters of the bogie. Kinematics and dynamics of a two-wheeled bogie-rail bicycle are analyzed instead of a single wheel and a wheelset, which makes it clearer and easier to explain how and what forces act on the bogie and how they affect on its position in the rail track. To calculate the motion parameters of a four-wheeled bogie, it is represented as two two-wheeled, moving each on its own rail. Connections between them are replaced by moments with respect to the point of contact between the flange of the guide wheel and the rail. This approach made it possible to give an approximate estimation of the main kinematic and force parameters of the motion of an ideal bogie (without axes skewing) in curves, to understand how the corners of the bogie installation and the gaps between the flanges of the wheels and rails vary when moving with different speeds, how wear and contact injuries arise and to give recommendations for their assessment and elimination.

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

2006 ◽  
Vol 42 (8) ◽  
pp. 525-529
Author(s):  
Yu. G. Vasenev ◽  
V. E. Ermolov ◽  
V. I. Mel’nik
Keyword(s):  
Nondestructive Testing ◽  
Rolling Stock ◽  
Wheel Pair

scholarly journals Graceful extensibility in asset management: extending the capacity to adapt in managing cyber-physical railway systems

2021 ◽  
Author(s):  
Jan-jaap Moerman ◽  
Jan Maarten Schraagen ◽  
Jan Braaksma ◽  
Leo van Dongen
Keyword(s):  
Asset Management ◽  
Adaptive Systems ◽  
New Technologies ◽  
Autonomous Driving ◽  
Cyber Physical Systems ◽  
Transportation Systems ◽  
Rolling Stock ◽  
Railway Transportation ◽  
Physical Systems ◽  
Railway Systems

AbstractGraceful extensibility has been recently introduced and can be defined as the ability of a system to extend its capacity to adapt when surprise events challenge its boundaries. It provides basic rules that govern adaptive systems. Railway transportation systems can be considered cyber-physical systems that comprise interacting digital, analog, physical, and human components engineered for safe and reliable railway transport. This enables autonomous driving, new functionalities to achieve higher capacity, greater safety, and real-time health monitoring. New rolling stock introductions require continuous adaptations to meet the challenges of these complex railway systems as an introduction takes several years to complete and deals with changing stakeholder demands, new technologies, and technical constraints which cannot be fully predicted in advance. To sustain adaptability when introducing new rolling stock, the theory of graceful extensibility might be valuable but needs further empirical testing to be useful in the field. This study contributes by assessing the proto-theorems of graceful extensibility in a case study in the railway industry by means of adopting pattern-matching analysis. The results of this study indicate that the majority of theoretical patterns postulated by the theory are corroborated by the data. Guidelines are proposed for further operationalization of the theory in the field. Furthermore, case results indicate the need to adopt management approaches that accept indeterminism as a complement to the prevailing deterministic perspective, to sustain adaptability and deal effectively with surprise events. As such, this study may serve other critical asset introductions dealing with cyber-physical systems in their push for sustained adaptability.

scholarly journals DETERMINATION OF RAILWAY ROLLING STOCK OPTIMAL MOVEMENT MODES

2017 ◽  
Vol 0 (6) ◽  
pp. 27-31
Author(s):  
A. N. Petrenko ◽  
B. G. Liubarskiy ◽  
V. E. Pliugin
Keyword(s):  
Rolling Stock ◽  
Optimal Movement ◽  
Railway Rolling Stock

scholarly journals Digitization in Rail Transport

2020 ◽  
Vol 64 (188) ◽  
pp. 137-148
Author(s):  
Janusz Poliński ◽  
Krzysztof Ochociński
Keyword(s):  
Customer Service ◽  
Traffic Management ◽  
Transport Infrastructure ◽  
Rolling Stock ◽  
Railway Transport ◽  
Railway Traffic ◽  
Railway Industry ◽  
Operations And Maintenance ◽  
Trained Staff

Digital transformation in the railway industry is an important element in the development of railways and should benefit commuters, railway operators, infrastructure managers and rolling stock manufacturers. The process of digitization applies to two domains, i.e. customer service and railway companies’ operation. This paper aims to present previous eff orts regarding the use of digital technologies in customer relations and in the field of operations and maintenance, which translates into the quality of services provided. This paper highlights important concepts of this domain with respect to passenger and freight transport, infrastructure, railway rolling stock and railway traffic management. It is also argued that the process of digitization needs properly trained staff . Examples of innovative initiatives of Polish and European railway companies are covered. Keywords: railway transport, digitization, digitization of the railways

Monitoring the technical condition of the railway track using the method of continuous recording of dynamic processes occurring due to the interaction between rolling stock and railway track

2021 ◽  
pp. 66-82
Author(s):  
Yuriy P. BORONENKO ◽  
◽  
Aleksandr V. TRET’YAKOV ◽  
Rustam V. RAKHIMOV ◽  
Mariya V. ZIMAKOVA ◽  
...  
Keyword(s):  
Practical Importance ◽  
Stability Margin ◽  
Technical Condition ◽  
Continuous Recording ◽  
Railway Track ◽  
Lateral Interaction ◽  
Rolling Stock ◽  
Monitoring Method ◽  
Wheel Pair ◽  
Interaction Forces

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

Measurement of wheel pair parameters of a rolling stock during movement

2003 ◽  
Author(s):  
Anatoli Z. Venediktov ◽  
Vladimir N. Demkin ◽  
Dmitri S. Dokov ◽  
V. N. Tireshkin
Keyword(s):  
Rolling Stock ◽  
Wheel Pair
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