Diagnostics of rail operational stress state by changing natural frequencies and vibration modes

• Main Authors: Savoskin, A. N., Chunin, S. V., Shabunevich, V. I., Ushanov, A. V., Gasyuk, A. S.
• Format: Conference Proceeding
• Language: English
• Subjects: Elongation; Finite element method; Railway tracks; Resonant frequencies; Stability; Thermal expansion; Vibration mode
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0104775

This article deals with the problem of estimating the stability of a continuous welded rail track at its thermal elongation. The authors describe a method for estimating the stability of a continuous welded rail track by comparing the actual temperature of anchoring the rail string with the specified one. The article applies a method for determining the actual temperature of anchoring the rail, consisting in measuring the rail temperature and frequencies of its natural vibrations, and a further analysis using the calculated dependence of the change of the frequency of natural vibrations of the rail head in the transverse direction on the value of the normal force applied to the rail. The authors also developed a finite-element model of the rail section, obtained the dependence of the change of the natural frequencies of the rail vibrations on the value of the normal force applied to it. Its verification was performed based on experimental data obtained as a result of performing tests on a specific stand. The method for performing tests on the stand and in the section of the continuous welded rail track of the Ozerskaya branch of the Moscow railway is described in the article. The calculation of the actual temperature of anchoring the rail is calculated on the example of a section of the continuous welded rail track of the Ozerskaya branch of the Moscow railway. Also, it is established that the temperature of anchoring the rail in the section under study corresponds to the specified one for this particular region.