PROCESS FEATURES OF FLUCTUATIONS PROPAGATION AT STRESS-STRAIN WORK OF THE RAILWAY TRACK

I. O. Bondarenko

Abstract


Purpose. Scientific work aims at the determination the basic laws of fluctuations propagation process from exitation of rolling stock in the design system of permanent way and substructures of the railway lines for studing the deformation processes as the basis for a regulatory framework of the track operation in the conditions of ensuring the reliability of railways. Methodology. To achieve the aim the principles of elasticity theories and wave propagation process in describing the interaction track and rolling stock were applied. Findings. The kinds of fluctuations and system which should be used when considering the fluctuations in the deformation process of rail track were established. The general view of the displacement function was determined. Originality. The theoretical concepts and principles to consider fluctuations of a structures system of permanent way and substructures of the railway track, energised by rolling stock were grounded. This will allow studing the process of deformation work of the mentioned system, which changes its state. That in turn will allow us to determine the parameters of the trains functional reliability, as part of the security passes of rolling stock on the track section with regard to its technical condition. Practical value. Usually for safe crossing of rolling stock parameters of fluctuation process in the system «vehicle-track» are determined. Existing models or carefully consider fluctuations of rolling stock in generalized characteristics of the structures of permanent way and substructures of the railway tracks or view of quasi-dynamic fluctuations rails with general characteristics of under rail base. This review process of oscillations, energised by rolling stock and delivered to all the elements of the permanent way and substructures of the railway track do not allow determining both the reliability parameters of elements in the system of track construction and parameters of functional reliability of trains as part of security checkpoints in the area of rolling stock gauge because of its technical state. Therefore, for examining issues of reliable performance elements of the permanent way and substructures of the railway track are proposed its stress-strain work. It gives the possibility to consider a dynamic process, localized both in time and space.


Keywords


modeling; solid; solid medium stress-strain work; forced fluctuations; free fluctuations; wave propagation; fluctuations frequency; reliability o f a track; dissipativity

References


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DOI: https://doi.org/10.15802/stp2015/55336

 

Cited-by:

1. SPECIALTY OF ROTOR’S DRIVE MECHANISM OSCILLATIONS
V. S. Loveikin, Yu. V. Chovnyuk, A. P. Lyashko
Science and Transport Progress. Bulletin of Dnipropetrovsk National University of Railway Transport  Issue: 1(61)  First page: 147  Year: 2016  
doi: 10.15802/stp2016/61032



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