Ballast is an important component of railway track structures. The vibration of ballast causes ballast settlement and the change of track geometries, therefore influences the track maintenance costs. According to the statistic of Chinese Railways (CR), about 75 % of the daily maintenance work on track structures is due to the ballast and its defomation. The vibration of railway ballast is a key factor to cause track geometry change and increase of track maintenance costs. So far the methods for analyzing and testing the vibration of the granular ballast have not been well formed. In this paper, a five-parameter model for analysis of the ballast vibration is established based upon the hypothesis that the load-transmission from a sleeper to the ballast approximately coincides with the cone distribution. The concepts of shear stiffness and shear damping of the ballast are introduced in the model in order to consider the continuity of the interlocking ballast granules. A full-scale field experiment is carried out to measure the ballast acceleration excited by moving trains. Theoretical simulation results agree well with the measured results. Hence the proposed ballast vibration model has been validated.
Modelling and experiment of railway ballast vibrations
Modellierung und experimentelle Untersuchung von Schwingungen im Schotterbett
Journal of Sound and Vibration ; 270 , 4/5 ; 673-683
2004
11 Seiten, 9 Bilder, 2 Tabellen, 16 Quellen
Article (Journal)
English
Modelling and experiment of railway ballast vibrations
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