| Title |
Development of FTMD to Improve the Robustness of Tuned Mass Damper |
| Authors |
전승곤(Jeon, Seung Gon );이재훈(Lee, Jae Hoon);허광희(Heo, Gwang Hee);이유재(Lee, Yu Jae) |
| DOI |
https://doi.org/10.12652/Ksce.2025.45.1.0023 |
| Keywords |
FTMD; 동조이탈; 진동제어; 거동특성; 피로하중 |
| Abstract |
To control the oscillations that threaten the safety of bridges, we have developed a Friction Tuned Mass Damper (FTMD) that can control the off-tuning phenomenon, a disadvantage of TMD, while maintaining the form of a Tuned Mass Damper (TMD) with proven control performance. The FTMD utilizes an electromagnet as the mass and is designed and manufactured to supply voltage to the friction plate attached to the FTMD to enable variable control depending on the supply time. The control performance of the developed FTMD was compared with the control performance of a TMD that removed the friction plate from the FTMD. In the bending behavior control experiment, an inertial type bending machine was attached to a model cable-stayed bridge and forced bending was performed at 0.03 Hz intervals from 3.50 Hz to 3.71 Hz, and FTMD, TMD, and LVDT were attached to the center span where the maximum displacement occurs. As a result of the experiment, the FTMD showed excellent control performance with a displacement damping ratio of 43.11 % at 3.50 Hz, where the maximum vertical displacement occurs in the center, and the displacement damping ratio of 26.84 % at 3.65 Hz, where the largest out-of-synchronization phenomenon occurs when the TMD is installed. |