Journal of the Korea institute for structural maintenance and inspection (한국구조물진단유지관리공학회 논문집)

Korea Institute for Structural Maintenance Inspection (한국구조물진단유지관리공학회)
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Development of ETMD(Electromagnetic Tuned Mass Damper) for Smart Control of Structure

구조물 스마트제어를 위한 ETMD(Electromagnetic Tuned Mass Damper)개발

  • 전승곤 (충남도립대학교, 건설안전방재학과) ;
  • 허광희 (건양대학교, 해외건설플랜트학과) ;
  • 이진옥 (충남대학교 토목공학과) ;
  • 이재훈 (한국스마트구조시스템연구원) ;
  • 김대혁 (한국스마트구조시스템연구원)
  • Received : 2022.01.17
  • Accepted : 2022.05.02
  • Published : 2022.06.30
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Abstract

The TMD has a simple structure than other vibration control devices and shows excellent control performance for the simple harmonic vibration generated in the structure. However, the vibration control range is narrower than other control devices, making it vulnerable to vibration cycles caused by unexpected external loads. The ETMD developed in this study consisted of Mass with electromagnets. Therefore when supplying a current, the magnetic field is formed to increase the friction force with the friction plate, thereby instantaneously controlling the behavior of the Mass. The experiment was conducted to compare the control performance of the control device by installing the ETMD developed for control performance evaluation in the center of the model simple beam bridge to forced excitation at 3.02 Hz where the maximum bending displacement occurs. As a result of the experiment, ETMD exhibited excellent control performance with a maximum bending displacement attenuation rate of 57.51%.

TMD는 다른 진동제어장치에 비해 구조가 단순하며, 구조물에 발생하는 정형화된 형태의 진동에 우수한 제어성능을 보인다. 그러나 다른 제어장치에 비하여 진동제어범위가 좁아 예상치 못한 외부하중으로 인하여 발생하는 진동주기에는 취약하다. 본 연구에서 개발된 ETMD는 Mass를 전자석으로 구성하여 전류를 공급할 때 자기장이 형성됨과 동시에 마찰판과의 마찰력을 상승시켜 Mass의 거동을 순간적으로 제어한다. 개발된 ETMD의 제어성능 평가를 위하여 모형 단순보 교량 중앙에 ETMD를 설치한 후 중앙부 최대 수직변위가 발생하는 3.02Hz 조건으로 강제 진동을 발생시켜 휨거동 제어실험을 수행하였다. 실험결과 ETMD는 중앙부 최대 수직변위가 발생하는 3.02Hz에서 변위 감쇠율이 57.51%로 우수한 제어성능을 발휘하며 그 외에 진동주기에도 안정적인 제어성능을 보이는 것을 확인하였다.

Keywords

Acknowledgement

본 연구는 2018년 정부(교육부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구사업(과제번호: NRF-2018R1A6A1A03025542)의 연구비 지원으로 수행되었으며, 이에 감사드립니다.

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