This paper presents a vibration mitigation method for a railroad station using dual layer TMD (Tuned Mass Damper) technology. The proposed technology can be applied to a platform by installing a spring-damper system between the platform and the railroad station structure. Especially, considering passenger comfort, the technology is developed for not just reducing the vibration of the railroad station structure but minimizing the vibration of the platform. The technology consists of two serially connected masses, and the vibration of the top mass is designed to be minimized, while the bottom mass serves as the platform TMD. The design parameters such as the spring constant and damping coefficient of the dual layer TMD system are optimized using the acceleration response of the structure, at which the platform is installed. The feasibility and performance of the vibration mitigation method is verified via a numerical example of a simple beam structure subjected to a moving load, which can be analogized as a railroad station with a moving train on top. The result of the numerical study shows that the proposed method can effectively reduces the vibration of the top mass as well as the beam structure at the design speed of the moving load.

1. 서 론
 2. DLTMD 이론
 3. 수치해석을 통한 검토
  3.1 해석개요
  3.2 진동저감효과 검토
 4. 결 론
 ACKNOWLEDGMENT
 REFERENCES

• 김민수(한국교통대학교 철도융합기술연구소 연구원) | Kim Minseu
• 이규세(선문대학교 토목공학과 교수) | Yi Gyu-Sei
• 최상현(한국교통대학교 철도인프라시스템공학과 교수) | Choi Sanghyun