Calculation of the dynamic responses of a railway track on a non-uniform foundation

Tran, Le-Hung; Hoang, Tien; Forêt, Gilles; Duhamel, Denis

doi:10.1177/10775463221099353

Cited by 8 publications

(5 citation statements)

References 29 publications

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“…When the third axle passes, the rail 2 is subjected a bigger reaction force (60.12 kN) while reaction force applied on the rail 1 is the same (47.87 kN). This phenomenon affects on the dynamic sleeper responses which have been demonstrated by Tran et al, [12]. When the fourth axle passes, the rail 2 is subjected a reaction force which is slightly smaller than the one applied on the rail 1 (47.57 kN compare with 47.87 kN) even though the train loads are the same.…”

Section: Numerical Examplementioning

confidence: 91%

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Calculation of the Dynamic Responses of Rails Subjected to Moving Loads on Ballasted Railway Track

Hung¹,

Duc²

2022

MaP

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The dynamical responses of railway track has been carried out by different ways. In this work, by developing an analytical model for the ballasted railway track which includes two rails connected to the railway sleeper, a fast method to calculated the dynamic responses of the two rails is presented. The rail is modelled as the infinite beams posed on the periodically supports which are rested on a viscoelastic foundation. We consider the dynamic equation in the steady-state of rails subjected to the moving loads. By using Fourier transform together the periodically conditions, a relation between the reaction force and the beam displacement in the frequency domain has been demonstrated. Then, by performing this relation into the dynamic equation of sleeper laying on viscoelastic foundation, the dynamic responses of the two rails can be obtained with a help of Green’s function. The numerical example demonstrates the effect of the support on the beam responses.

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Section: Numerical Examplementioning

confidence: 91%

“…This work has been carried out with the two beams models for the rail. Tran et al, [12] presented an analytical model to calculate the track responses with non-uniform foundation. The dynamic responses of railway sleeper have been investigated by Tran et al, [13,14].…”

Section: Introductionmentioning

confidence: 99%

Calculation of the Dynamic Responses of Rails Subjected to Moving Loads on Ballasted Railway Track

Hung¹,

Duc²

2022

MaP

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“…The application of elastic wave theory in the geometric setting during modeling offers the third advantage of the approach to the design of 'closed' measurement systems [67][68][69][70][71][72]. The third benefit lies in the fact that no additional artificially imposed constraints, such as boundary conditions, are needed in the consideration of the process of propagation of the impact impulse by means of elastic waves in different directions.…”

Section: Approach Towards the Design Of The 'Closed' Measurement Systemmentioning

confidence: 99%

Novel ‘Closed’-System Approach for Monitoring the Technical Condition of Railway Tracks

Bondarenko,

Lukoševičius,

Neduzha

2024

Sustainability

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Assessing the technical condition of a railway track throughout its service life is crucial to ensuring functional safety. However, it is important to note that current approaches have theoretical and practical gaps that require attention. The purpose of this study is to discuss the reconceptualization of an integrated approach to assess changes in the technical condition of railway tracks caused by rolling stock over their service life. Improving existing systems for assessing the condition of the track can be achieved by modifying the model concept and, subsequently, the measurement and assessment procedures. This paper presents an alternative method for addressing technical issues related to the monitoring and diagnosis of railway tracks, with a particular focus on natural phenomena: energy transfer by elastic waves. The primary aim of this work is to propose an approach for designing a ‘closed’ measurement system that enables tracking of the cause-and-effect relationship. This system takes into account both the elastic dissipative characteristics of the track–rolling stock interaction and the influence of the dynamics of various components in the ‘train-track’ system.

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“…In order to take into account the distribution of discrete supports, Mead [13,14] developed the periodically supported beam model under moving loads for the rail. This model type has been also investigated for elastic foundations [15][16][17][18]. A fast analytical method to calculate the dynamic responses of railway sleepers has been presented by Tran et al [19,20].…”

Section: Introductionmentioning

confidence: 99%

Calculation of dynamic responses of railway sleepers on a nonlinear foundation

Tran,

Hoang,

Foret

et al. 2023

Nonlinear Dyn

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The safety of a passing train depends on different factors, of which one of the most important is the behavior of the foundation. Therefore, the effects of the non-linearity of ballast on the dynamic responses of the railway track are a key research interest. In this paper, a new model of railway sleepers posed on a nonlinear foundation has been developed. By coupling the finite element method (FEM) of the sleeper with an analytical model of the periodically supported beam model, the dynamic equation of the sleeper is developed. On the other hand, by considering a periodic series of moving loads, this equation can be transformed to a forced nonlinear oscillation. Iteration procedures have been built to calculate the periodic solution. This method has demonstrated a good convergence of results by comparison with the analytical solution in the linear case. The influence of the nonlinear foundation has been investigated by two examples: cubic-nonlinear and bi-linear foundations. The parametric studies demonstrate that numerical results converge with a small number of iterations.

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Calculation of the dynamic responses of a railway track on a non-uniform foundation

Cited by 8 publications

References 29 publications

Calculation of the Dynamic Responses of Rails Subjected to Moving Loads on Ballasted Railway Track

Calculation of the Dynamic Responses of Rails Subjected to Moving Loads on Ballasted Railway Track

Novel ‘Closed’-System Approach for Monitoring the Technical Condition of Railway Tracks

Calculation of dynamic responses of railway sleepers on a nonlinear foundation

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