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

Kurhan, Dmytro; Kurhan, M. B.; Horváth, Balázs; Fischer, Szabolcs

doi:10.3390/applmech4020041

Cited by 3 publications

(2 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Its focus is enhanced by the fact, that the software database includes the specialized modelling elements for calculation of the wheel/rail phenomenon [20; 21], further it includes wheel-pair and wheelset modelling elements for setting-up a proper position of the wheelset in a track axis and other needed modelling elements. Regarding the wheel/rail contact [22][23][24], the known and the most often used algorithm FASTSIM [25][26][27] has been applied for calculation of the wheel/rail issue in the created model. The created MBS model of a bogie consists of rigid bogies interconnected by massless flexible elements.…”

Section: Methodsmentioning

confidence: 99%

Comparison of selected outputs of rail vehicle bogie variant solutions

Dižo

Blatnický

Ishchuk

et al. 2023

22nd International Scientific Conference Engineering for Rural Development Proceedings

View full text Add to dashboard Cite

Rail vehicles are important transport means, which are used for transportation of plenty of passengers as well as tons of goods almost on all continents in the world. Railway transport represents an effective and sufficiently reliable kind of transport, mainly when it comes to electric trains. Increasing transport speeds together with relative strict requirements on safety and costs needed for operation, maintenance and repairing make high demands on operational properties of rail vehicles. They are especially demands on their dynamical properties, at which, a bogie is a key subsystem of a rail vehicle. This presented research is focused on investigation of dynamical properties of a rail vehicle bogie. Specifically, it is a locomotive bogie. It is a prototype two-axle bogie intended to be mounted on a newly designed electric two-bogie locomotive. The main objective of this work is to compare the selected output quantities of three variant solutions of a bogie. These variants differ to each other by values of the weight of bogie components, the weight distribution as well as the pivot pins distance. The article presents a comparison of two output quantities, namely yaw angles of bogies and deformation of springs in bogies. Parameters of a bogie and a locomotive have been provided by a commercial producer of locomotives. Numerical analyses have been performed for specific operational conditions defined by the running speed in a curved track. There have been performed the number of simulation computations for various running speeds and curve radii, at which, the article includes only the particularly chosen data.

show abstract

Section: Methodsmentioning

confidence: 99%

Comparison of selected outputs of rail vehicle bogie variant solutions

Dižo

Blatnický

Ishchuk

et al. 2023

22nd International Scientific Conference Engineering for Rural Development Proceedings

View full text Add to dashboard Cite

show abstract

“…Paved tramway track degradation may be structural or geometric. Paved railways first degrade in terms of the track gauge, then in alignment and longitudinal level, then the rails, fasteners, and so on [39][40][41].…”

Section: Deterioration Of Tramwaysmentioning

confidence: 99%

Investigation of the Geometrical Deterioration of Paved Superstructure Tramway Tracks in Budapest (Hungary)

et al. 2023

View full text Add to dashboard Cite

In the 21st century, one of the key requirements is to develop and maintain our infrastructure facilities most efficiently using the available resources. Tramways are of significant national economic importance and represent an important national asset. There are currently seven different types of superstructure systems in Hungary, based on the national regulations and the related requirements currently in force. This paper compares the paved tramway superstructure systems in the context of track geometry, through-rolled axle tons of track, and the age of track sections. Paved tracks have many benefits, but the main ones are easier maintenance and road traffic use. Elastically supported continuous rail bedding (ESCRB; in Hungary, this is known as “RAFS”) and “large” slab superstructure systems are used to create paved superstructure systems. Road crossings use the latter systems, while heavily loaded lines use several ESCRB systems. This article examines the geometrical changes in several ESCRB superstructure systems. A TrackScan 4.01 instrument was used to take measurements in June and September 2021 and in April 2022, September 2022, and May 2023. Track gauge, alignment, and longitudinal level are examined. Regardless of the ESCRB superstructure system or age, a medium-loaded line’s track gauge trendline increases, which means that the track gauge is widening and, regardless of traffic load or age, the average longitudinal level is constantly increasing from year to year. When it is a medium-loaded line, the average value of alignment increases slightly, and the trendline is almost straight, but it decreases when it is an extremely heavily loaded line. The authors will analyze how the reference track section will change in the future. Based on the results, it is important to assess how subsequent measurements affect the trend lines. Because the data evaluations show similar results, comparing open tramway tracks to paved ones is crucial.

show abstract

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

Fischer,

Kurhan,

Kurhan

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

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.

show abstract

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

Cited by 3 publications

References 29 publications

Comparison of selected outputs of rail vehicle bogie variant solutions

Comparison of selected outputs of rail vehicle bogie variant solutions

Investigation of the Geometrical Deterioration of Paved Superstructure Tramway Tracks in Budapest (Hungary)

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

Contact Info

Product

Resources

About