Numerical and Experimental Study on Contact Force Fluctuation Between Wheel and Rail Considering Rail Flexibility and Track Conditions

Ienaga, Saki; Terumichi, Yoshiaki; Nishimura, Kazuhiko; Nishina, Minoru

doi:10.1007/978-3-319-30614-8_11

Cited by 3 publications

(1 citation statement)

References 16 publications

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“…Dynamic forces of interaction between wheels and rails is significantly dependent on undersprung mass of the locomotive, most of which were mass wheelset. To reduce these forces, it is advisable to reduce the weight of the wheelset [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Stress-Strain State of a Wheel Flange of the Locomotive by the Method of Finite Element Modeling

Zhussupov¹,

Toktamyssova²,

Abdullayev³

et al. 2018

mech

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Section: Introductionmentioning

confidence: 99%

Investigation of the Stress-Strain State of a Wheel Flange of the Locomotive by the Method of Finite Element Modeling

Zhussupov¹,

Toktamyssova²,

Abdullayev³

et al. 2018

mech

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Effect of unsupported sleepers on vertical levelling loss of heavy-haul railway track geometry under cyclic loadings

de Melo,

Kaewunruen,

Papaelias

2024

Proceedings of the Institution of Mechanical Engineers, Part F:

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With an emphasis on the combined degradation of railway track geometry and components, an improved numerical approach is proposed for predicting the track geometrical vertical levelling loss (VLL). In contrast to previous studies, this research unprecedentedly considers the influence of unsupported sleepers (US) configuration on VLL under cyclic loadings, elasto-plastic behaviour, and different operational dynamic conditions. The nonlinear numerical models are performed adopting an explicit finite element (FE) package, and their results are validated by field data. The outcomes are iteratively regressed by an analytical logarithmic function that cumulates permanent settlements, and by a power function factor, which innovatively extends the response of US on VLL over a long term. Results shows that at 3 million cycles (or 60 MGT) the worst configuration for 20-ton axle load is at 5 US with 5-mm gap (5,51%), whereas for 30 and 40-ton axle loads is at 5 US with 2-mm gap (1.23% and 0,89%, respectively). This indicates that the axle load affects considerably the VLL as expected, however, the US condition plays an important role to accelerate it. Based on this study, the acceptable configuration of US can be specified for a minimum effect on VLL (thresholds) and, therefore, supports the development of practical maintenance guidelines to prolong the railway track service life.

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Effect of unsupported sleepers on rail track dynamic behaviour

Sadeghi

Zakeri

Kian

2018

Proceedings of the Institution of Civil Engineers - Transport

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Railway track behaviour with unsupported prestressed sleepers has been investigated in the literature. However, some of the important factors – such as prestressing forces, variations of the sleeper cross-section along its length, losing or recovering contact between the sleeper and the ballast layer – have been omitted. These limitations have been addressed in this research. The effects of unsupported sleepers on the dynamic behaviour of railway track have been investigated, using an improved three-dimensional numerical model of track developed here. The validity of the model is evaluated by comparing the results obtained from the model with experimental results (obtained in this research and available in the literature). The influences of the size of the gap between the sleeper and the underlying ballast, the vehicle speed and the number of unsupported sleepers on the track dynamic behaviour were investigated. The effects of the various unsupported conditions of sleepers on the rail seat load, sleeper bending moment and sleeper–ballast contact force at various train speeds were illustrated. It was shown that consideration of sleeper prestress forces, detailed geometry of the sleepers and a more realistic assumption for the sleeper–ballast contact has considerably improved the accuracy of the results obtained from theoretical models.

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Numerical and Experimental Study on Contact Force Fluctuation Between Wheel and Rail Considering Rail Flexibility and Track Conditions

Cited by 3 publications

References 16 publications

Investigation of the Stress-Strain State of a Wheel Flange of the Locomotive by the Method of Finite Element Modeling

Investigation of the Stress-Strain State of a Wheel Flange of the Locomotive by the Method of Finite Element Modeling

Effect of unsupported sleepers on vertical levelling loss of heavy-haul railway track geometry under cyclic loadings

Effect of unsupported sleepers on rail track dynamic behaviour

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