METHOD FOR ASTIMATING STABILITY MARGIN OF CONTINUOUS WELDED RAILWAY TRACK Russian patent published in 2017 - IPC E01B35/00 B61K9/08 

FIELD: measurement equipment.

SUBSTANCE: method for estimating the stability margin of the continuous welded railway track includes the rail whip temperature registration when it is placed in the way, and after repair work, the identification of the rail whip stress state, for this purpose, the current value of the rail whip temperature and the intensity of the Barkhausen generated noise in this section of the way are determined on the rail whip in the sections at the intervals of 50-500 metres, the intensity of the Barkhausen magnetic noise is estimated in the relative terms, the definition of the actual temperature of rail whip fixing. The current value of the rail whip temperature and the intensity of the Barkhausen generated noise are determined at different rail whip temperature values, at least, two times at the rail whip temperatures lower than the rail whip laydown temperature, and, at least, twice at the temperatures above the rail whip laydown temperature, the equation of rail whip stretching is obtained from the values of the Barkhausen noise intensity produced at the rail whip temperatures lower than the rail whip laydown temperature, the equation of rail whip compressing is obtained from the values of the Barkhausen noise intensity produced at the temperatures above the rail whip laydown temperature. The actual rail whip fixing temperature (T_af) in this section is determined by calculation solving the system of two equations, the actual rail whip temperature increase [ΔT_e]^fact=(T_w-T_af) over the actual rail whip fixing temperature (T_af) is determined, the resulting value is compared with a normalized admissible temperature increase of the rail whips relative to their fixing temperature in this way section [ΔT_e]. According to this difference, the temperature safety factor is estimated in this section of the continuous welded railway track.

EFFECT: improved accuracy of estimating the stability margin of the continuous welded railway track.

3 cl, 1 dwg, 1 tbl