Wanming Zhai, Xuesong Jin, Zenfeng Wen, Xin Zhao*. Wear problems of high-speed wheel/rail systems: observations, causes, and countermeasures in China. Applied Mechanics Review, 2020, 72(6): 060801 (23 pages). https://doi.org/10.1115/1.4048897.
Fig. 11 Reduction of the polygonization order as the wheel diameter decreases, observed on a 350 km/h EMU running at speeds up to 300 km/h in 2015 and 2016. Each curve represents one wheel, and the wavelength is about 160mm.
