A Multi-model Approach to Analyse Railway Track-Ground Dynamics and Soil Nonlinearity

Charoenwong, C.; Connolly, David; Dong, Kaitai; Costa, Pedro Alves; Soares, Paulo; Woodward, Peter Keith

doi:10.1007/978-3-030-77234-5_4

Cited by 2 publications

(5 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Kritická rychlost je pak stanovena z disperzních křivek. Z hlediska náročnosti prováděných výpočtů je tento přístup nejméně náročný, ale získané výsledky nejsou příliš přesné [3], [4].…”

Section: Analytický Přístupunclassified

“…Tento přístup umožňuje lepší popis vztahu mezi rychlostí pohybu zatížení (vlaku) a velikostí amplitud odezvy podloží při zachování relativně malé výpočetní náročnosti. Navzdory podrobnějšímu modelu podloží železniční trati tento přístup neposkytuje příliš přesné výsledky [3], [4].…”

Section: Semi-analytický Přístupunclassified

“…Nevýhodou tohoto přístupu je jeho omezená použitelnost pouze pro konstrukci koleje s pevnou jízdní dráhou. V případě konstrukce koleje s pražci tento přístup neumožňuje zohlednit mezeru mezi pražci [4].…”

Section: 5 D Modelováníunclassified

“…Složitost výpočtu zeminy a podloží pomocí MKP ve 3D zjednodušují výpočtem jejich chování na několika tenkých vrstvách a pružném poloprostoru. Tímto přístupem je zajištěna přesnost získaných výsledků a nižší výpočetní náročnost [4], [6]. 2.…”

Section: Metoda Tenkých Vrstevunclassified

See 3 more Smart Citations

Nové poznatky ve výpočtu odezvy podloží vysokorychlostních tratí na průjezd vlaku

Petýrek¹,

Horníček²

2022

Juniorstav

View full text Add to dashboard Cite

The article presents the possibilities of approaches to the calculation of the subsoil response of a railway line to high-speed train running with a focus on Rayleigh waves. The article describes in more detail the approach to the calculation using the method of thin layers, which seems promising for the calculation of the response of the track with the construction of the track with transverse sleepers. The article is focused on this method with regard to the expected use of the track with sleepers on high-speed lines in the Czech Republic. Furthermore, the article mentions the implementation of nonlinear behaviour of soil under dynamic load during the passage of the train and the issue of calculating the subsoil of the line formed by multiple layers of soil with different parameters.

show abstract

Section: Analytický Přístupunclassified

Section: Semi-analytický Přístupunclassified

Section: 5 D Modelováníunclassified

Section: Metoda Tenkých Vrstevunclassified

See 2 more Smart Citations

Nové poznatky ve výpočtu odezvy podloží vysokorychlostních tratí na průjezd vlaku

Petýrek¹,

Horníček²

2022

Juniorstav

View full text Add to dashboard Cite

show abstract

“…To address the aforementioned challenges, methodologies to predict differential track settlement without relying on historical track geometry records and consider the evolution of track geometry irregularities has been studied by [4]- [7]. However, it is challenging and computationally demanding to calculate the distributions of 3D dynamic stresses in the track and the ground when modelling over a larger number of cyclic loads in the time domain, particularly for large track structures [8]- [10]. These stress fields are used to compute the deviatoric stress which is one of the most influential parameters for settlement calculation [11] and thus needed to model explicitly.…”

Section: Introductionmentioning

confidence: 99%

Modelling railway track differential settlement for prediction of future deterioration and maintenance intervals

Charoenwong¹,

Connolly²,

Woodward³

et al.

Civil-Comp Conferences

View full text Add to dashboard Cite

Under repeated traffic, railway track settles differently along the distance, causing irregularities in track geometry. This track irregularity evolves over time which induces higher train-track dynamic interaction force and further settlement. Track geometry is used to define track quality and maintenance required. Historical track geometry values can be extrapolated future track deterioration and maintenance intervals. However, using extrapolation of historical records become challenging when changes are made to rolling stock, traffic or track design. Therefore, this paper introduces a numerical algorithm that is capable of calculating differential settlement considering the incremental effect of train-track dynamic interaction forces and deviatoric stresses during the track lifecycle. The simulation is performed across frequency-wavenumber and time-space domains to optimise computational time and thus allow for track irregularity profile to be updated every load passage. The propagation 3D stress in track-ground is modelled explicitly using Finite

show abstract

A Multi-model Approach to Analyse Railway Track-Ground Dynamics and Soil Nonlinearity

Cited by 2 publications

References 28 publications

Nové poznatky ve výpočtu odezvy podloží vysokorychlostních tratí na průjezd vlaku

Nové poznatky ve výpočtu odezvy podloží vysokorychlostních tratí na průjezd vlaku

Modelling railway track differential settlement for prediction of future deterioration and maintenance intervals

Contact Info

Product

Resources

About