Journal of the Earthquake Engineering Society of Korea (한국지진공학회논문집)

Earthquake Engineering Society of Korea (한국지진공학회)
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Development of Improved Semi-Active Damper Using EMRF

EMRF를 이용한 개선된 Semi-Active Damper 개발

  • Jeon, Seung gon (Dept. of Construction Safety & Disaster Prevention, Chungnam State University)
  • 전승곤 (충남도립대학교 건설안전방재학과)
  • Received : 2022.03.28
  • Accepted : 2022.04.20
  • Published : 2022.07.01
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Abstract

Magneto-Rheological Fluid (MRF) is a functional fluid in which flow characteristics change into magnetic force due to its magnetic particles. When the semi-active control device does not use MRF for a long time, precipitation of magnetic particles and abnormal control force occur. Thus, Electro Magneto-Rheological Fluid (EMRF), which improves the precipitation of magnetic particles for MRF and exhibits existing control performance, was developed in this study. First, the optimal mix proportion ratio was selected by conducting a precipitation experiment and a controlled force test by varying the content of grease based on the existing MRF components. Also, EMRF was applied to the shear-type damper to evaluate the control performance when applied to the control device. The cylinder-type damper was developed to apply to the structure, and control performance evaluation was conducted. The result confirmed that the precipitation of the magnetic particles was improved, while the damper using EMRF exhibited excellent control performance.

Keywords

Acknowledgement

이 논문은 2018년도 정부(교육과학기술부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구사업(NRF-2018R1A6A1A03025542)임. 본 연구가 이루어지도록 지원하여 준 한국연구재단에 대단히 감사합니다.

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