The complex phenomenological model for prediction of inhomogeneous deformations of railway ballast layer after tamping works
Journal Title: Archives of Transport - Year 2018, Vol 47, Issue 3
Abstract
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 sub-ballast 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.<br/><br/>
Authors and Affiliations
Mykola Sysyn, Ulf Gerber, Vitalii Kovalchuk, Olga Nabochenko
Keywords
Related Articles
- EP ID EP397256
- DOI 10.5604/01.3001.0012.6512
- Views 125
- Downloads 0
Exploitation Research of Tram’s Head Lighting – Low Beam Lights
Appropriately shaped light beam conditions correct visibility from a tram driver’s seat and makes it easier to assess properly road situations connected with behaviour of other road traffic participants. The article pres...
A general iterative solver for unbalanced inconsistent transportation problems
The transportation problem, as a particular case of a linear programme, has probably the highest relative frequency with which appears in applications. At least in its classical formulation, it involves demands and suppl...
Testing of Railway Pantograph
The Department of Rail Transport of the Silesian University of Technology conducted certification research of carbon composite materials provided by different manufacturers to be applied as pantograph strips. Additional...
MODEL-BASED INVESTIGATIONS ON DYNAMIC SHIP HEELS IN RELATION TO MARITIME TRANSPORT SAFETY
The paper has been presented criteria of similarity between of liquid motion. Results of initial research on air flow’s dynamic impact on a ship model of 888 project type are presented in the elaboration as well. The res...
Optimisation of the Railway Transition Curves’ Shape with Use of Vehicle-track Dynamical Model
The concept and the method by present authors of searching for proper shape of transition curves are described in present paper. Short literature survey provides a background for such description. In the concept and meth...