Numerical analysis of dynamic response in railway switches and crossings

Salajka, Vlastislav; Smolka, Marek; Plášek, Otto; Kala, Jiří

doi:10.1201/b21811-233

Cited by 2 publications

(2 citation statements)

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“…Rails displacement, temperatures, ballast pressure, stresses were measured and analyzed during the monitoring. Analysis of dynamic response on switches and crossings is demonstrated in [38].The dynamic response was numerically simulated by Finite Element Method model of common crossing. An analysis of the correlation between vehicle responses and track irregularities is presented in the study [39].…”

Section: Vol 15 Issue 2/2019 101-114mentioning

confidence: 99%

Multifractal Analysis of the Common Crossing Track-Side Measurements

Sysyn

Ižvolt

Nabochenko

et al. 2019

Civil and Environmental Engineering

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The deterioration common crossing elements increase the need for the maintenance of crossings and significantly reduce the reliability, availability and safety of railway traffic. The present paper introduces the results of experimental investigation of common crossing monitoring while its deterioration during the lifecycle of crossing. The conventional methods of common crossing condition estimation with time-based features like maximal accelerations, etc. are low appropriate as statistically significant condition indicators. The proposed multifractal analysis enables to extract the significant features from acceleration measurements. The extracted features are fused together with information about the train velocities and longitudinal position of wheels impact with the Lasso regularisation and multivariate linear regression. A ranking of feature importance is done and the redundant features are identified. The developed condition indicator has good correlation to the crossing lifetime and is simple for interpretation.

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Section: Vol 15 Issue 2/2019 101-114mentioning

confidence: 99%

Multifractal Analysis of the Common Crossing Track-Side Measurements

Sysyn

Ižvolt

Nabochenko

et al. 2019

Civil and Environmental Engineering

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“…The influence of wheel diameter difference on high-speed dynamic interaction of wheel and turnout is presented in the numerical study [19]. The influence of track stiffness on the dynamical response of railway switches and crossings is studied with the FEM simulation in [20][21]. Numerical simulations and influence analysis of the switch irregularities on the dynamic loadings are presented in the study [22].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of the Influence of Train Velocity and Travel Direction on the Dynamic Behavior of Stiff Common Crossings

et al. 2019

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Common crossing rails are subjected to a rapid deterioration of the rolling surface due to a dynamic loading of trains. The present study is devoted to an experimental study of the displacement and rail strain measurements in the common crossing. The experimental measurements were carried out for two stiff common crossings under the dynamic loading of high-speed train for the velocity range of 54-254 km/h. The results showed 2.5 times increase of the maximal displacements within the velocity range. The absence of the difference in the displacements between the trailing and the facing travel direction is explained with the relative displacement measurements between the rail and the sleeper and the different dynamic impact loading for the wing rail. The proposed model-based analysis of the absolute measurement of rail strain enables us to estimate the dynamic factor under the impact loading. The wing rail for trailing direction is almost twice as highly loaded as the frog rail for the facing direction. The maximal dynamic factor for the trailing direction shows almost no change for the velocities of more than 200 km/h.

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Numerical analysis of dynamic response in railway switches and crossings

Cited by 2 publications

References 0 publications

Multifractal Analysis of the Common Crossing Track-Side Measurements

Multifractal Analysis of the Common Crossing Track-Side Measurements

Experimental Investigation of the Influence of Train Velocity and Travel Direction on the Dynamic Behavior of Stiff Common Crossings

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