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Title |
Control of Bending Behavior of Simple Beams Using CTMD
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Authors |
허광희(Gwang-Hee Heo) ; 서상구(Sang-Gu Seo) ; 김충길(Chung-Gil Kim) ; 전승곤(Seung-Gon Jeon) ; 김민기(Min-Ki Kim) |
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DOI |
https://doi.org/10.11112/jksmi.2021.25.6.12 |
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Abstract |
The purpose of this study is to effectively mitigate the bending displacement that occurs in the bridge due to forced vibration. We developed CTMD (Combine Tuned Mass Damper) that combines the relationship between spring and mass to control the bending behavior of simple beams. The experiment was conducted to confirm the control effect according to the change in the mass ratio of the developed CTMD. The developed CTMD is designed and manufactured so that the mass ratio can be adjusted according to the characteristics of the bridge. The maximum load of the spring applied to CTMD was fixed at 33.15 N. In order to evaluate the performance of the developed CTMD, a simple beam composed of hinges and rollers as boundary conditions was fabricated. In the experimental method, a CTMD was installed in the center of a simple beam and the deflection displacement according to the mass ratio was measured. The shaking condition was shaken at 3 Hz to induce the maximum bending behavior of the simple beam. As a result of the experiment, it was confirmed that when the optimal mass ratio was 2.1, the damping rate of the bending behavior displacement was about 71.2 %, indicating the best control effect.
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