首页|Numerical analysis of high-speed railway slab tracks using calibrated and validated 3D time-domain modelling

Numerical analysis of high-speed railway slab tracks using calibrated and validated 3D time-domain modelling

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Concrete slabs are widely used in modern railways to increase the inherent resilient quality of the tracks,provide safe and smooth rides,and reduce the maintenance frequency.In this paper,the elastic performance of a novel slab trackform for high-speed railways is investigated using three-dimensional finite element modelling in Abaqus.It is then compared to the performance of a ballasted track.First,slab and ballasted track models are developed to replicate the full-scale test-ing of track sections.Once the models are calibrated with the experimental results,the novel slab model is developed and compared against the calibrated slab track results.The slab and ballasted track models are then extended to create linear dynamic models,considering the track geodynamics,and simulating train passages at various speeds,for which the Ledsgård documented case was used to validate the models.Trains travelling at low and high speeds are analysed to investigate the track deflections and the wave propagation in the soil,considering the issues associated with critical speeds.Various train loading methods are discussed,and the most practical approach is retained and described.Moreover,correlations are made between the geotechnical parameters of modern high-speed rail and conventional standards.It is found that considering the same ground condition,the slab track deflections are considerably smaller than those of the ballasted track at high speeds,while they show similar behaviour at low speeds.

High-speed railwaysSlab trackNew ballastless trackBallasted trackCritical speedsFinite element modellingCalibration of numerical models

A.F.Esen、O.Laghrouche、P.K.Woodward、D.Medina-Pineda、Q.Corbisez、J.Y.Shih、D.P.Connolly

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Institute for High-Speed Rail and System Integration,University of Leeds,Leeds LS29JT,UK

Institute for Infrastructure and Environment,Heriot-Watt University,Edinburgh EH14 4AS,UK

Alstom Transport,Saint-Ouen,France

Birmingham Centre for Railway Research and Education,University of Birmingham,Birmingham B15 2TT,UK

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ALSTOM through a PhD scholarshipEngineering and Physical sciences Research Council(EPSRC)

EP/N009207/1

2024

10.1007/s40534-023-00315-3

铁道工程科学(英文)
西南交通大学

铁道工程科学(英文)

影响因子：0.403
ISSN：2662-4745
年,卷(期)：2024.32(1)
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