곡선부 캔트 과부족 자갈궤도의 궤도충격계수 고찰

초록

In the curved track, the contribution of wheel load on the low and high rail was fluctuated by cant deviation according to various vehicle speed, and it was affected on the track components by considering the equilibrium cant or cant excess condition. In this study, the measured track impact factor of each rail was compared with the performance requirements of ballasted track under real conditions, which included cant variation of curved ballasted tracks. Therefore, the dynamic wheel load were measured for three different trains (KTX, AREX and AREX express) running on two conventional curved track sections with two different cant (elevation). The track impact factor was estimated from the measured dynamic wheel load, and the empirical dynamic wheel load was calculated using the measured track impact factor at each site. The numerical simulations and field test results were compared with Korean regulations for train-induced track impact factor (dynamic amplification factor), and the speed effect of a KTX train was compared with that of a general train (AREX and AREX express).