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Scientific monographs

Reducing the accidental rate of wagons by improving the system for assessing their technical condition: monograph

DOI
https://doi.org/10.36074/rarwisatc-monograph.2024
Published
2024-02-23

Abstract

The monograph will be valuable for researchers, designers, and engineers engaged in activities associated with reducing the accident rate of railway cars through the enhancement of systems assessing their technical condition. Specifically, it addresses issues related to the utilization of laboratory cars during full-scale tests for evaluating motion quality, acceptance, and commissioning of railway rolling stock. However, the current state of measurement equipment development enables the abandonment of such laboratory cars in favor of mobile hardware-software complexes during dynamic testing of rolling stock units in most cases.

The organization of freight train traffic in Ukraine is a critical factor in integrating the country's railway transport into the European system. Currently, a situation has arisen that demands a significant upgrade of the freight wagon fleet with modern wagons to meet the requirements of freight transportation. Another substantial drawback of Ukraine's railway transport is the speed limitation for trains with wagons having reduced tare weight, impacting the speed of rail freight transport. Therefore, there is an immediate need to improve the methodological and software support, along with testing tools, for evaluating the performance and safety indicators of such wagons. Due to their unsatisfactory dynamic behavior, a specific group of freight wagons, such as platform wagons, has a speed limit of 60 km/h, negatively affecting rail freight speed.

Crucial indicators of the railway rolling stock's motion quality include vertical and horizontal dynamics, the wheel flange stability coefficient against derailment, frame forces, and body accelerations. These aspects largely depend on the weight of the rolling stock's tare and the interaction indicators between the crew part and the track. The monograph's objective is to illuminate the results of conceptual solutions aimed at assessing the technical condition and motion quality indicators of wagons under the conditions of operation using modern mobile systems. The book also presents the outcomes of prior theoretical and practical works, including an analysis of railway traffic safety issues and existing systems for determining motion quality indicators. A proposed mobile system for determining the motion quality indicators of wagons in operation and a complex of hardware, software, and mathematical solutions for determining the motion quality indicators of wagons are included. Concepts of freight wagons with improved motion quality characteristics are also discussed.

The book can serve as a textbook for the training of bachelor's, master's, and doctoral students in various specialties related to transport mechanics, including railway transport, transport technologies, mechanical engineering, materials science, and others.

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This monograph is recommended for printing by the Science Council of Volodymyr Dahl East Ukrainian National University (protocol N o 06 dd 30.01.2024).

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REVIEWERS:

MASLIYEV Vyacheslav - Doctor of Technical Sciences, Professor, Department of Electric Transport and Heat Engineering, National Technical University «Kharkiv Polytechnic Institute», Ukraine

SAPRONOVA Svitlana - Professor, Doctor of Technical Sciences, Department of cars and carriage facilities, State University of Infrastructure and Technologies, Ukraine

TKACHENKO Viktor - Professor, Doctor of Technical Sciences, Department of Traction Rolling Stock of Railways, State University of Infrastructure and Technologies, Ukraine

USTENKO Oleksander - Professor, Doctor of Technical Sciences, Dean of the Faculty of Mechanics and Energy, Ukrainian State University of Railway Transport, Ukraine.

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CONTENTS:

INTRODUCTION

SECTION 1. REVIEW AND ANALYSIS OF EMERGENCY SITUATIONS ON THE RAILWAYS AND CAUSES OF THEIR OCCURENCE
1.1 Study of emergency situations and issues of quality indicators of carriage movement
1.2 Analysis of literature sources and approaches for evaluating traffic quality and safety indicators
1.3 Analysis of existing systems to determine traffic quality and safety indicators
1.4 Analysis of existing projects to improve the quality and safety indicators of carriage movement
Conclusions on section 1

SECTION 2. METHODS AND APPROACHES FOR ASSESSING INDICATORS OF QUALITY, TRAFFIC SAFETY AND TECHNICAL CONDITION OF WAGONS
2.1 Measurement of deformations of load-bearing structures. General information
2.2 Measurement of forces by local deformations of the bogie frames
2.3 Measurement of forces of direct interaction of wheels with rails
2.4 Measurement of dynamic indicators of rolling stock
Conclusions on section 2

SECTION 3. IMPROVING MEANS AND APPROACHES FOR ASSESSING SAFETY INDICATORS AND TECHNICAL CONDITION OF FREIGHT WAGONS
3.1 Mathematical support for determining safety indicators and technical condition of freight wagons
3.2 Software for collecting and registering safety indicators and technical condition of wagons
3.3 Study of indicators that affect the quality of carriage movement
Conclusions on section 3

SECTION 4. PRACTICAL ASPECTS OF IMPLEMENTATION OF IMPROVED MEANS AND APPROACHES FOR DETERMINING AND ASSESSING INDICATORS OF SAFETY AND TECHNICAL CONDITION OF WAGONS
4.1 A mobile system for determining safety indicators and technical condition in operating conditions
4.2 Hardware and primary converters of the mobile system
4.3 Software for collecting and recording measurements
4.4 Practical studies of quality indicators and movement safety of freight wagons in an empty state
4.5 Restoration of the carrying capacity of the wagon for transporting grain
Conclusions on section 4

SECTION 5. SYSTEM FOR MEASURING THE INTERACTION FORCES OF WHEELS AND RAILS ACCORDING TO THE CHARACTERISTICS OF THE STRESSED AND DEFORMED STATE
5.1 Determination of the deformation sensitivity zones of the wheel disc to force load
5.2 Theoretical studies of wheels dynamic loading of passenger wagons at high speeds
5.3 Practical study of the direct measurement method of the interaction forces of the wheels with rails
5.4 Requirements for the system of direct measurement of the interaction forces of the wheel pairs with rails
Conclusions on section 5

SECTION 6. MOBILE SYSTEM FOR DETERMINING THE DYNAMIC LOAD OF THE ROLLING PARTS OF THE ROLLING STOCK IN OPERATION
6.1 General requirements for software and hardware complex
6.2 Measurement information collection subsystem
6.3 A system for determining the level of comfortable movement
6.4 The system for determining the smoothness of movement
6.5 System for determining traffic safety indicators
6.6 A system for determining the indicators of the interaction of the pantograph and contact network
Conclusions on section 6

GENERAL CONCLUSIONS

REFERENCES

Addition А. PATENT DEVELOPMENTS FOR IMPROVING WAGON TRAFFIC SAFETY INDICATORS

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Year of publication: 2024
Language: English
Authors: Fomin O., Prokopenko P
Translation: No
Translator: -

Type: E-book
Number of pages: 362
Format: PDF (195 MB)
ISBN: 979-8-89217-800-6
UDC: 629.4.02.001.76

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