Numerical investigation on wheel-rail impact contact solutions excited by rail spalling failure

• Build a 3D wheel-rail transient explicit rolling contact FE model considering rail spalling failure. Investigate dynamic response characteristics when the train passes area under different conditions. Use wavelet transform technique to process signal and detect defects dynamically. The length of has great influence on interaction its limit is found. Rail typical form fatigue (RCF), difficult problem that always existed in railways. Once wheel rolls across failure area, there will be violent interaction. This paper presents an high-speed finite element considers local condition lengths stress states, as well plastic strain spalling, are calculated using theory dynamics. In addition, time–frequency analysis carried out obtain distribution signals such axle box acceleration, vibration acceleration vertical force time domain frequency domain. Furthermore, vehicle travels at high speed, speed radius have little force, or energy peak frequency. effect mutual correlation small. But along with frequency, increase approximately linear fashion impact wheelset These results can used guide detection rails.