An assessment method of rail corrugation based on wheel–rail vertical force and its application for rail grinding

Abstract In practice, the assessment and treatment of rail corrugation are quantitatively based on depth. Wheel–rail vertical forces (WRVF), as a direct reflection wheel–rail interaction, can give expression to depth thus serve key parameter for assessing corrugation. this paper, we propose an evaluation method WRVF. First, 3D dynamic finite element (FE) model was developed with typical parameters CRTS II slab track CRH3 vehicle high-speed railways in China. The accuracy then validated measured WRVF data field. Second, using model, time–frequency domain distribution (vehicle speed: 300 km/h) obtained consideration wavelength range 40–180 mm. non-linear least squares rational equation were used fit function between large value under conditions different wavelengths. Next, effects Pinned–Pinned resonance frequency vibration mode fitted analysed, by which indicator (grinding) proposed. Finally, applied monitoring railway lines results show that misjudgement rate grinding decisions (using proposed indicator) is low at 92.5%. provide basis decisions-making.