Mykola Kurhan

57204426235

Publications - 6

Innovative Technologies and Cognitive Factors for Enhancing Safety of Train and Car Movement at Level Crossings

Szabolcs Fischer Mykola Kurhan Dmytro Kurhan

Publication Name: Lecture Notes in Networks and Systems

Publication Date: 2025-01-01

Volume: 1258 LNNS

Issue: Unknown

Page Range: 1-13

Description:

Safety in transportation is an exceptionally complex and multifaceted concept. The research focuses on the functioning processes of hazardous transportation facilities - railway crossings with varying intensity and transportation parameters, which require solutions to a wide range of theoretical, practical, and organizational tasks. The integration of innovative technologies, a beacon of hope, to modernize existing crossings and implement cognitive direction systems can help create a safer environment at railway crossings. To reduce the likelihood of human error and improve safety, it is recommended to utilize both existing technologies and innovative opportunities to develop new safety solutions for railway crossings, considering cognitive processes - mental operations used for perception of information, its retention in memory, processing, analysis, interpretation, and utilization for decision-making and problem-solving.

Open Access: Yes

DOI: 10.1007/978-3-031-81799-1_1

Development of High-Speed Railway Network in Europe: A Case Study of Ukraine

Szabolcs Fischer Mykola Kurhan Dmytro Kurhan Oleksii Tiutkin Nelya Hmelevska

Publication Name: Periodica Polytechnica Transportation Engineering

Publication Date: 2024-01-01

Volume: 52

Issue: 2

Page Range: 151-158

Description:

The current task today is the development of theoretical and methodological approaches, as well as practical recommendations for determining the technical feasibility of creating high-speed railway (HSR) lines in the European context. The development of railways in individual countries, followed by the creation of a pan-European high-speed railway network, has raised questions about the compatibility of the technical systems of individual national HSRs. This paper addresses these issues using the example of Ukraine. The research is based on an analysis of scientific developments related to the design of HSR lines and the synthesis of European experience in identifying priority route directions in Ukraine. For comparing various scenarios for the development of railway connections, the authors have developed a forecasting and efficiency assessment model based on the Net Present Value (NPV) indicator. It has been demonstrated that considering the population attracted to HSR and the volume of transit passenger transportation alone is insufficient to achieve the normative investment payback. This situation can only be rectified by implementing mixed traffic involving high-speed passenger trains and accelerated freight trains. However, mixed traffic of passenger and freight trains on high-speed rail lines may face numerous issues and constraints that require careful planning and coordination.

Open Access: Yes

DOI: 10.3311/PPtr.23464

Determining the Deformation Characteristics of Railway Ballast by Mathematical Modeling of Elastic Wave Propagation

Szabolcs Fischer Balázs Horváth Mykola Kurhan Dmytro Kurhan

Publication Name: Applied Mechanics

Publication Date: 2023-06-01

Volume: 4

Issue: 2

Page Range: 803-815

Description:

The article solves the problem of theoretically determining the deformable characteristics of railway ballast, considering its condition through mathematical modeling. Different tasks require mathematical models with different levels of detail of certain elements. After a certain limit, excessive detailing only worsens the quality of the model. Therefore, for many problems of the interaction between the track and the rolling stock, it is sufficient to describe the ballast as a homogeneous isotropic layer with a vertical elastic deformation. The elastic deformation of the ballast is formed by the deviation of individual elements; the ballast may have pollutants, the ballast may have places with different levels of compaction, etc. To be able to determine the general characteristics of the layer, a dynamic model of the stress–strain state of the system based on the dynamic problem of the theory of elasticity is applied. The reaction of the ballast to the dynamic load is modeled through the passage of elastic deformation waves. The given results can be applied in the models of the railway track in the other direction as initial data regarding the ballast layer.

Open Access: Yes

DOI: 10.3390/applmech4020041

The Prospect of Using the Dual Gauge Line for the Ukraine–Hungary Railway Connection

Szabolcs Fischer Mykola Kurhan Dmytro Kurhan

Publication Name: Periodica Polytechnica Transportation Engineering

Publication Date: 2023-01-01

Volume: 51

Issue: 1

Page Range: 70-78

Description:

There are several international transport corridors in Hungary. Záhony railway station is one of the largest hubs in Europe, providing a railway connection between Ukraine and the European Union. Two different railway tracks meet and come together here, such as the standard (1435 mm) and broad (1520 mm) gauges. The availability of a developed infrastructure of the dual gauge on the territory of Hungary presupposes the corresponding development of the railway connection by Ukraine. In order to effectively use the dual gauge line and solve problems of special design, it is necessary to ensure the appropriate train flows. This research aims to provide scientific support for express analysis of the railway routes' competitiveness between Ukraine and the European Union to define the determining factors. The application of such approaches provides a tool for establishing the prospects for the development of existing railway lines, considering their features. Scientific approaches to creating methods for determining the priority areas of railway transport have been further developed. Apart from involving such essential indices as average speed and traffic volumes, the authors added the possibility of considering the presence of lines with such design features as single-track sections, non-electrified, dual gauge, etc., on the route. The theoretical background is applied as a tool for rapid calculations for increasing the competitiveness of the Chop–Záhony dual gauge line.

Open Access: Yes

DOI: 10.3311/PPtr.20572

Analysis of stress-strain state changes in railway tracks during transition to European gauge

Szabolcs Fischer Mykola Kurhan Dmytro Kurhan Nelya Hmelevska

Publication Name: Iop Conference Series Earth and Environmental Science

Publication Date: 2024-01-01

Volume: 1348

Issue: 1

Page Range: Unknown

Description:

The geographical location of Ukraine facilitates its integration into the transportation network connecting European countries. Various options exist for transitioning from the gauge of 1 520 mm to the European standard gauge of 1 435 mm. This paper aims to analyze the changes in the stress-strain state of railway track elements during the reconstruction of existing sections from the 1 520 mm gauge to the 1 435 mm European gauge or to a dual gauge of 1 435/1 520 mm. To perform these calculations, a spatial model of dynamic deformations in the railway track is employed, based on the principles of elasticity theory. The implementation of a combined railway track complicates the stress state of the ballast layer, leading to asymmetric stresses along the length of the sleepers, which vary depending on the track on which trains operate. There is also a redistribution of stresses acting on the ground structure, which has been in operation for many years. The research results identify changes in the stress-strain state of the railway track and can be used to justify measures for the appropriate reinforcement of the ballast layer and the ground structure.

Open Access: Yes

DOI: 10.1088/1755-1315/1348/1/012029

The Role of Domain Size and Boundary Conditions in Mathematical Modeling of Railway Tracks

Szabolcs Fischer Mykola Kurhan Dmytro Kurhan Oleksii Tiutkin

Publication Name: Applied Mechanics

Publication Date: 2025-09-01

Volume: 6

Issue: 3

Page Range: Unknown

Description:

In developing a mathematical model of a railway track, the question of determining the dimensions of the modeling domain inevitably arises. If the modeling area is too small, boundary effects may significantly influence the results, reducing their accuracy. Conversely, excessively large areas can increase computational complexity without substantial improvements in accuracy. An optimal choice of dimensions enables the balancing of computational costs and accuracy. Solving this problem is non-trivial, as it depends on numerous factors, primarily the type of mathematical model and the problem being addressed. In most cases, preference is given to minimal domain sizes that ensure the approach’s adequacy. The aim of this study is to justify the dimensions of the modeling domain by addressing such tasks as load scaling, introducing additional boundary conditions, and making relevant assumptions. The main object of the study is the minimum adequate longitudinal length of the track for the spatial model. The research is based on the analytical application of modern approaches in the theory of elasticity. The results are analyzed using mathematical methods, such as modeling the railway track through the propagation of elastic waves and finite element modeling. These findings can be applied to a wide range of problems related to the mathematical modeling of the stress–strain state of railway tracks.

Open Access: Yes

DOI: 10.3390/applmech6030072