10.14489/td.2019.02.pp.014-021

2019, 02 February

DOI: 10.14489/td.2019.02.pp.014-021

Stepanova L. N., Kurbatov A. N., Tenitilov E. S.
LONGITUDINAL STRESSES INVESTIGATION IN RAIL USING THE ACOUSTOELASTICITY EFFECT ON THE ACTING RAILWAY TRACK SECTION
(pp. 14-21)

Abstract. The technique of control of longitudinal strains and fastening temperature factors in railway lashes of a continuous welded rail track by ultrasonic (US) method based on the acoustoelasticity effect is developed. Measurements of longitudinal strains in rails under mechanical tension with a relative error of no more than 10 % were carried out in a freight car at the SGUPS training ground. The influence of the rail temperature on the speed of propagation of US waves is determined. Dependences of the changes in the delay time of US waves on temperature in the unloaded section of the rail and in the loaded rail are obtained. A method has been developed that makes it possible to take the effect of temperature into account on the propagation time of US waves when determining longitudinal strains in rails. Calculation of strains in the rail track was carried out through the measured time parameters of US waves. The strains and temperatures of fastening the rails on the active section of the railway track were investigated using the acoustoelasticity effect.

Keywords: rail, continuous welded rail track, ultrasound, acoustoelasticity, temperature, strain, sensor, wave.

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L. N. Stepanova (Federal State Unitary Enterprise “Siberian Aeronautical Research Institute named after S. A. Chaplygin”, Novosibirsk, Russia);
A. N. Kurbatov, E. S. Tenitilov (The Siberian Transport University (STU), Novosibirsk, Russia) E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.

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DOI: 10.14489/td.2019.02.pp.014-021

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