Many studies have shown that the rail corrugation on small radius curve section of subway floating slab track is serious. And it seems to be different from common track. The structure must play an important role in generation and development corrugation. This paper measured a line Tianjin, including 2 structures, analyzed data by using international evaluation acceptance indexes results show in...

The noise caused by rail corrugation seriously affects the operation quality of metro vehicles. In this work, corrugation, interior and wheel–rail a line were tested, test results compared with those after two kinds treatments. show that is main cause abnormal noise. in many sections exceeds limit, where clear corrugations from 31.5~63 mm are found. When train passes through section, shows incr...

Despite significant efforts throughout the last decades, the mechanisms behind the formation of squats — a form of rolling contact fatigue (RCF) damage in rails — are not fully understood. Proposed causes of initiation involve, but are not limited to, small initial rail surface irregularities which yield high contact stresses, rail corrugation and varying friction conditions. To complicate matt...

This paper proposes a new hypothesis for the formation process of short pitch rail corrugation. An FE wheel-track dynamic model is utilized to verify by reproducing corrugation initiation and consistent growth. It found longitudinal compression modes are responsible with necessary initial excitation that allows flexibility vibration. Consistency between vertical bending eigenfrequencies system ...

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 paramet...