• 한국지진공학회:학술대회논문집
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• 한국지진공학회 2003년도 추계 학술발표회논문집
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• pp.387-394
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• 2003

A compromise between passive and active control systems has been developed recently in the form of semi-active control systems. Semi-active control systems maintain the reliability of passive control systems while taking advantage of the adjustability of an active control system. This paper presents the results of an experimental study to evaluate the performance of a semi-active orificed fluid damper. The semi-active orificed fluid damper considered is a two-stage damper with normally open solenoid valve. Through a series of experimental tests, characteristics and performance of the damper is investigated.

• 한국소음진동공학회논문집
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• 제12권6호
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• pp.469-477
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• 2002

An orificed fluid damper(OFD) having the capacity of about 2 tons was designed and fabricated, and series of tests were performed to grasp the fundamental performance characteristics of it. Several important findings were observed and introduced in this paper. It was applied to a 6-story steel structure under random excitation and seismic excitation for the confirmation of its validity on structural vibration absolution. The experimental results demonstrated that the addition of an OFD to the test structure is very effective in reduction of vibration level of the higher modes as well as the fundamental mode. Maxwell model was adopted to describe the frequency-dependent characteristics of the fabricated OFD and the numerical simulation was carried for the test structure. It was confirmed that the experimentally and numerically simulated results agree well.

• 한국지진공학회논문집
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• 제8권2호
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• pp.55-62
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• 2004

최근 구조물 진동제어 연구분야에서는 반능동형 진동제어(제진)장치어 대한 연구가 활발하게 진행되고 있다. 반능동형 제진장치는 수동형의 장점인 신뢰성과 경제성 및 능동형의 장점인 적용성(순응성)을 얻을 수 있기 때문이다. 본 연구에서는 반능동형 제진장치의 일종으로 2톤급 반능동형 오리피스 유체댐퍼를 설계ㆍ제작하여 구조물의 적용을 통해 성능을 검증하였다. 수동형 오리피스 유체댐퍼에 2단 솔레노이드 밸브를 설치하여 반능동형을 구현하였다. 단독 성능시험을 통해 동특성을 파악하고, 시험용 철골구조물 적용시험을 통해 외부하중을 받는 구조물의 진동제어용 장치로서의 가능성을 확인하였다.

• 한국지진공학회:학술대회논문집
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• 한국지진공학회 2001년도 추계 학술발표회 논문집 Proceedings of EESK Conference-Fall 2001
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• pp.364-372
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• 2001

An orifices fluid damper(OFD) having the capacity of about 2 tons was designed and fabricated and applied to a 6-story steel structure under random excitation and seismic excitation for the confirmation of its validity on structural vibration absorbtion. The experimental results demonstrated that the addition of an OFD to the test structure is very effective in reduction of vibration level of the higher modes as well as the fundamental mode. Maxwell model was adopted to described the frequency-dependent characteristics of the fabricated OFD and the numerical simulation was carried for the test structure. It was confirmed that the experimental and numerically simulated results agree well.