The complex phenomenological model for prediction of inhomogeneous deformations of railway ballast layer after tamping works

• Autorzy: Sysyn M. , Gerber U. , Kovalchuk V. , Nabochenko O.

Identyfikatory

DOI

10.5604/01.3001.0012.6512

• Języki publikacji: EN

Abstrakty

EN

The given article considers the method of calculating the track geometry deformation with respect to uneven accumulation of residual deformations along the track. The technique proposes two significant changes in existing approaches to calculating the efficiency of the ballast layer. The transition from the approach of allowable stresses design in the ballast layer to the deformative approach of accumulations of track geometry deformations allows us to draw conclusions regarding the intervals of track tamping and the duration of ballast layer life cycle. The transition from the determinative to probabilistic approaches makes it possible to draw conclusions not only from the average unevenness, but also with regard to all possible facts of unevenness. The method is based on the mechanism of sudden and gradual deformations occurrence, which depends on a number of key factors: dynamic stresses on the ballast, non-uniformity of track elasticity, performance of current maintenance work. Based on the experimental studies results, the dependencies of sudden deformations and the intensity of gradual deformations on the level of stress on the ballast layer were established. The experimental results of the influence of the subballast base elasticity on the intensity of accumulation of residual deformations are shown. On the basis of the developed method, the prediction of track geometry deterioration for a given structure of the track, the rolling stock and the permissible level of geometric deviations for track maintenance is presented.

Słowa kluczowe

EN

track geometry; phenomenological modeling; track unevenness; uniform subsidence; inhomogeneous subgrade; tamping works

PL

geometria toru; modelowanie fenomenologiczne; nierówności; osiadanie jednolite; podłoże niejednorodne

• Wydawca: Warsaw University of Technology, Faculty of Transport
• Czasopismo: Archives of Transport
• Rocznik: 2018
• Tom: Vol. 47, iss. 3
• Strony: 91--107
• Opis fizyczny: Bibliogr. 32 poz., fot., rys., tab., wykr.

Twórcy

autor

Sysyn M.

• Institute of Railway Systems and Public Transport, Technical University of Dresden, Dresden, Germany

autor

Gerber U.

• Institute of Railway Systems and Public Transport, Technical University of Dresden, Dresden, Germany

autor

Kovalchuk V.

• Department of the rolling stock and track, Lviv branch of Dnipropetrovsk National University of Railway Transport, Lviv, Ukraine

autor

Nabochenko O.

• Department of the rolling stock and track, Lviv branch of Dnipropetrovsk National University of Railway Transport, Lviv, Ukraine

Bibliografia

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Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).