In this study, it was investigated dynamic behaviors of track roadbed with various loading frequency with real train loading using a full scale testing as MTS system. The dynamic behaviors of track roadbed system was increased linear regression with increased loading frequency at less than 35Hz, but was decreased at wheel load, displacement, and acceleration over 35Hz. It was found that critical loading frequency was about 35Hz, and that velocity level of train speed was evaluated about 320km/h～340km/h.

• 최찬용(한국철도기술연구원 고속철도연구본부 선임연구원) | chanyong, Choi
• 강윤석(한국철도기술연구원 고속철도연구본부 책임연구원) | Kang, Yoon Seok
• 김주용(한국철도기술연구원 고속철도연구본부 주임연구원) | Kim, Joo Yong