Influence of stiffness characteristics of a railway track on output parameters in a multibody model

Dižo, Ján; Blatnický, Miroslav

doi:10.1051/matecconf/202031801003

Cited by 3 publications

(2 citation statements)

References 14 publications

(9 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The vertical stiffness of the sub-slipper layer is set to 50 MN/m. In study [18], a model of passenger carriage motion is considered. The railway track has a constant vertical stiffness of 1.65 × 10 8 N/m.…”

Section: Introductionmentioning

confidence: 99%

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

Kurhan

Horváth

et al. 2023

Applied Mechanics

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 99%

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

Kurhan

Horváth

et al. 2023

Applied Mechanics

View full text Add to dashboard Cite

show abstract

“…Similarly, cooperation was established with the Faculty of Mechanical Engineering of the University of Žilina. Here, the joint research activities focused on assessing the railway line by means of numerical modelling in terms of safety and driving comfort in relation to the stiffness and flexibility of the railway line [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Experimental Verification of Modified Sub-Ballast Layers, Application of Foam Glass Boards

Dobeš

Ižvolt

Mečár

2022

Civil and Environmental Engineering

View full text Add to dashboard Cite

Glass waste decomposition time in landfills or the countryside can exceed several millennia. Recycling and finding new uses for municipal waste, where glass accounts for approx. 10 % of the volume, is therefore essential to ensure the sustainable development of society. A novel method of reusing glass waste is to produce a thermal insulation material called foam glass in the form of boards. The manufacturer characterises the foam glass boards as having extreme compressive strength and being suitable for highly loaded building structures. The Department of Railway Engineering and Track Management (DRETM) has been long-term researching the possibility of applying various thermal insulation materials (composite foam concrete, Liapor concrete, extruded polystyrene boards) to the sub-ballast layers. For the above reasons, an experimental field was constructed to validation a modified design of the sub-ballast layers with embedded foam glass boards. The paper’s objective was to verify whether the modified composition of the sub-ballast layers affects the increase of its deformation resistance. The assessment of the deformation resistance of the sub-ballast layers of the modified and standard construction was performed by a series of static load tests in the particular structural layers.

show abstract

Static Modulus of Deformation of Uncemented Layers of the Railway Substructure—Comparison of Values and Determination of Correlation Dependence According to the Test Procedure of the Slovak Railways and Deutsche Bahn A.G.

et al. 2023

View full text Add to dashboard Cite

The paper focuses on the analysis of the values of the static modulus of deformation obtained by the application of the test procedure specified in the methodology for the diagnostics of the sub-ballast layers used for German railways (DIN 18 134) and the Railways of the Slovak Republic (Regulation TS4). The purpose of the study was to determine the correlation between the measured values of the static modulus of deformation according to the above-mentioned methodologies based on a series of experimental measurements on an experimental field built at a scale of 1:1. It also aimed to develop a numerical model characterising the behaviour of the loaded environment during the experimental measurements using the finite element method, which can subsequently be used for the design of the structural composition of the sub-ballast layers. For the purpose of the experimental measurements, a sub-ballast layer of 0/31.5 mm crushed aggregate of different design thicknesses was applied to the sub-ballast layers. A polynomial dependence with a high value of the reliability coefficient can be found between the results of the static modulus of deformation obtained using the mentioned measurement methodologies during the quality inspection of the implemented construction works. This dependence is valid for the specific boundary conditions of the experimental measurements performed (subsoil of clay with gravel admixture and the sub-ballast crushed aggregate layer of 0/31.5 mm dolomitic gravel). In the future, establishing correlation dependencies for other boundary conditions and structural material compositions can be considered.

show abstract

Influence of stiffness characteristics of a railway track on output parameters in a multibody model

Cited by 3 publications

References 14 publications

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

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

Experimental Verification of Modified Sub-Ballast Layers, Application of Foam Glass Boards

Static Modulus of Deformation of Uncemented Layers of the Railway Substructure—Comparison of Values and Determination of Correlation Dependence According to the Test Procedure of the Slovak Railways and Deutsche Bahn A.G.

Contact Info

Product

Resources

About