고속차량 차륜답면 구배에 따른 승차감 비교연구

The wheel of railwau have a certain wheel surface gradient for driving safety. KTX-1 used GV40 profile of French that have 1/40 wheel surface gradient. However, be unstable condition occurs frequently on bogie while applying 1/40 wheel surface gradient. In order to solve the unstable problem of bogie, wheel surface gradient changes to 1/20 called XP55. On this study, riding comfort compare GV40 with XP55 wheel profile experimentally.