Physical Mechanisms of Ballast Granules Flying during Passage of High-Speed Trains
https://doi.org/10.30932/1992-3252-2020-18-54-71
Abstract
The article analyzes the mechanisms of crushed stone flying on high-speed railways. The objective of the work was to study and identify main mechanisms entailing flight of crushed stone from the ballast bed. It is substantiated that the main mechanism consists in squeezing of crushed stone particles from the upper layer of granules and their rise above the crushed stone bed following the action of longitudinal and transverse stresses in ballast, and that the most probable places of ejection of crushed stone particles is the border of contact between sleepers and the upper layer of the crushed stone bed.
The physics of this process is presented, which consists in lifting ballast by turbulent vortices, suspension of crushed stone particles over the bed under the influence of vibration, in collision of moving particles and the process of squeezing and ejection of ballast granules. The reasons for the occurrence of horizontal and lateral stresses in crushed stone ballast are shown.
About the Authors
V. M. Belkov
JSC VNIIZhT
Russian Federation
Russian Federation
Belkov, Vladimir M. – D.Sc. (Physics and Mathematics), Scientific Consultant of the Scientific and Consulting Center for Ph.D. studies of JSC Rail Research Institute
Moscow
G. V. Gogrichiani
JSC VNIIZhT
Russian Federation
Russian Federation
Gogrichiani, Georgy V. – D.Sc. (Eng), Head of the Scientific and Consulting Center for Ph.D. studies of JSC Rail Research Institute
Moscow
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For citations:
Belkov V.M., Gogrichiani G.V. Physical Mechanisms of Ballast Granules Flying during Passage of High-Speed Trains. World of Transport and Transportation. 2020;18(3):54-71. https://doi.org/10.30932/1992-3252-2020-18-54-71
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