Vertical Behaviour in Track Dynamics due to Wheelflats
Makoto ISHIDA , Shigeru MIURA , Akiko KONO
Considering the current status of an increasing train speed, it is very important to understand track dynamics from the aspects of maintaining the good quality of track, i.e., preventing the deterioration and/ or fracture of track components and the influence of track dynamics on noise and ground vibration. Using the analytical track model established by the authors, dynamic responses between track and vehicle caused by trains running on wheelflats were analysed. As a result, the effect of train speed on track dynamics caused by wheelflats and the difference between the dynamics of 50kg/m rail and 60kg/m rail, and that of Bernoulli-Euler beam and Timoshenko beam have been made clear from the aspects of dynamic wheel loads, rail base bending stresses, rail vibration velocity and rail pad force and so fotrh.