Track Dynamic Model and its Analytical Results
Makoto ISHIDA , Shigeru MIURA , Akiko KONO
Large dynamic forces act between wheel and rail due to rail surface irregularities at rail welded parts and/ or wheel flats. With regard to such dynamic forces and track responses caused thereby, various models have been so far proposed, with which a lot of findings have been gained. Considering the current status of an increasing train speed and a reduced maintenance cost of track and vehicle, however, it is necessary to understand dynamic phenomena and dynamic effects on the deterioration and/ or fracture of track and vehicle components more precisely than ever. In fact, it is very important to establish an appropriate track/ vehicle dynamic model which has enough accuracy to estimate various practical situations. In this paper, the analytical model the authors established was verified using measured data on the actual Shinkansen track. Also, some typical track dynamic behaviors estimated with the model were described.