Modelling a temperature regime of a railway track structure and its comparison with the results of experimental measurements

摘要

Following the completed experimental monitoring of the temperature regime of the construction of a subgrade structure on the experimental stand of the Departments Railway Engineering and Track Management and measurement of thermal conductivity coefficients λ of building materials used in construction of a subgrade structure, there are constructed mathematical models, which are designed to not only verify the temperatures obtained in individual structural components of subgrade structure of experimental stand, but also the possibility to use appropriate software to model temperature regime of other types of constructions of subgrade structures. The paper presents mathematical models for the typical winter periods, which have been recorded since the beginning of the experimental measurements conducted from 2003 to the end of the winter period of 2013 using the software SV-HEAT SVOFFICE SoilVision and there are also comparisons presented in achieving the position of zero isotherm in the construction of a subgrade structure. At the end of this paper, some of the knowledge obtained from the mathematical modelling of the temperature regime of the construction of a subgrade structure and confrontations with the temperature regime of a monitored, real railway track are underlined.