http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
허광희 ( Heo Gwanghee ),전준용 ( Jeon Joonryong ),김충길 ( Kim Chunggil ),정기수 ( Jung Kisoo ),오주원 ( Oh Juwon ) 한국구조물진단유지관리공학회 2008 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.12 No.2
The ultimate purpose of this research on the whole is to develop a vibration control method effectively applied for cable-stayed bridges which is structurally flexible, and to evaluate its effectiveness. As a primary step on the way to the ultimate goal, this paper describes our experiment on vibration control which was performed through the on-off control method of shear mode MR damper. The response values (displacement and acceleration) acquired from this experiment are contrasted with those of un-control method, and thus we evaluate the performance capacity of each different control method. For the experiment, we used a model bridge structure which was a reduced one of Seohae Grand Bridge one two hundredth in size, and also installed two shear mode MR dampers with electromagnetic yoke in the center of middle span. Also installing both displacement meters and accelerometers on each one fourth, two fourth, and three fourth position of the middle span, we estimated displacement and acceleration under each different control method. In order to measure the excitation of the structure, we use a shaker on the center of left span which would be able to perceive the El centro earthquake wave. The performance index we used were peak absolute displacement and peak absolute acceleration, by which the effect of controlling is evaluated. Finally, this paper concludes that the on-off control method using the MR damper turns out to be functionally superior to the un-control one, and thus the method is effective for the vibration control of cable-stayed bridges. It also proves that the results of the experiment performed in this research can be utilized as objective performance index in evaluating the effectiveness of the semi-active control which applies a variety of control algorithms.
전단형 MR 댐퍼를 이용한 케이블 교량의 실시간 진동제어-파워 모델 및 리야프노브 제어 중심으로
허광희,이진옥,전승곤,김충길,전준용,Heo, Gwanghee,Lee, Chinok,Jeon, Seunggon,Kim, Chunggil,Jeon, Joonryong 한국지진공학회 2017 한국지진공학회논문집 Vol.21 No.5
In this paper, an experimental study was carried out for vibration control of cable bridges with structurally flexible characteristics. For the experiment on vibration control, a model bridge was constructed by reducing the Seohae Grand Bridge and the shear type MR damper was designed using the wind load response measured at Seohae Grand Bridge. The shear type MR damper was installed in the vertical direction at the middle span of the model bridge, and dynamic modeling was performed using the power model. The tests of the vibration control were carried out by non-control, passive on/off control and Lyapunov control method on model bridge with scaled wind load response. The performance of the vibration control was evaluated by calculating absolute maximum displacement, RMS displacement, absolute maximum acceleration, RMS acceleration, and size of applied power using the response (displacement, acceleration, etc.) from the model bridge. As a result, the power model was effective in simulating the nonlinear behavior of the MR damper, and the Lyapunov control method using the MR damper was able to control the vibration of the structure and reduce the size of the power supply.
진동 제어를 위한 준능동형 압착식 스마트 MR 감쇠기의 동적 모델링
허광희(Heo Gwanghee),전준용(Jeon JoonRyong),이규(Lee Giu),이제훈(Lee JaeHoon) 한국구조물진단유지관리학회 2006 한국구조물진단학회 학술발표회논문집 Vol.10 No.1
In this paper, a new MR technology is developed with squeeze smart MR damper for structural vibration control. And various performance tests and dynamic modeling are studied on identification of the dynamic characteristics of this device. This developed control device is designed for a compact large capacity by separating magnetic orifice from the main cylinder. Experimental tests are done with various dynamic loading conditions. Force-displacement hysteresis loops and force-velocity relationship curves are acquired for identification of dynamic characteristics to evaluate of the performance of this developed device. Finally, two types analytic models, based on power model and Bingham model, are investigated for the predicting of dynamic behavior for squeeze smart MR damper by comparing with experimental results.
허광희 ( Heo Gwanghee ),전준용 ( Jeon Joonryong ),김충길 ( Kim Chunggil ),오주원 ( Oh Juwon ) 한국구조물진단유지관리공학회 2010 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.14 No.1
This paper is concerned with an experimental research to control of random vibration caused by external loads specially in cable-stayed bridges which tend to be structurally flexible. For the vibration control, we produced a model structure modelled on Seohae Grand Bridge, and we designed a shear type MR damper. Also, we inflicted a reduced form of El-centro wave on the model structure to a proper proportion. On the center of its middle span, we placed a shear type MR damper which was to control its vibration and also acquire its structural responses such as displacement and acceleration at the same site. The experiments concerning controlling vibration were performed according to a variety of theories including un-control, passive on/off control, clipped-optimal control, and Lyapunov stability theory. Its control performance was evaluated in terms of the peak absolute displacements, the peak absolute accelerations, and the total power required to control the bridge which differ from each different experiment method. Among all the methods applied in this paper, clipped-optimal control and Lyapunov control method turned out to be the most effective to reduces of displacements, accelerations, and external power. Finally, It is proven that the clipped-optimal control method and Lyapunov control method was effective and useful in the vibration control employing a semi-active devices such MR damper.
허광희(Heo, Gwanghee),전준용(Jeon, Joonryong),김충길(Kim, Chunggil),오주원(Oh, Juwon) 한국구조물진단유지관리학회 2010 한국구조물진단학회 학술발표회논문집 Vol.2010 No.1
This paper is concerned with an experimental research to control of random vibration caused by external loads specially in cable-stayed bridges which tend to be structurally flexible. For the vibration control, we produced a model structure modelled on Seohae Grand Bridge, and we designed a shear type MR damper. Also, we inflicted a reduced form of El-centro wave on the model structure to a proper proportion. On the center of its middle span, we placed a shear type MR damper which was to control its vibration and also acquire its structural responses such as displacement and acceleration at the same site. The experiments concerning controlling vibration were performed according to a variety of theories including un-control, passive on/off control, clipped-optimal control, and Lyapunov stability theory. Its control performance was evaluated in terms of the peak absolute displacements, the peak absolute accelerations, and the total power required to control the bridge which differ from each different experiment method. Among all the methods applied in this paper, clipped-optimal control and Lyapunov control method turned out to be the most effective to reduces of displacements, accelerations, and external power. Finally, It is proven that the clipped-optimal control method and Lyapunov control method was effective and useful in the vibration control employing a semi-active devices such MR damper.
허광희 ( Heo Gwanghee ),전준용 ( Jeon Joonryong ),김충길 ( Kim Chunggil ),전승곤 ( Jeon Seunggon ),이진옥 ( Lee Chin Ok ) 한국구조물진단유지관리공학회 2009 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.13 No.1
This paper is concerned with an experimental research to control vertical vibration caused by moving loads specially in cable-stayed bridges which tend to be structurally flexible. Experimenting on a reduced structure modelled on Seohae Grand Bridge, we inflicted a reduced form of Elcentro wave on the model structure to a proper proportion. On the center of its middle span, we placed a shear type MR damper which was to control its vibration and also acquire its structural responses such as displacement and acceleration at the same site. The experiments concerning controlling vibration were performed according to a variety of theories including uncontrol, passive control, on-ff control, and Lyapunov stability theory. Its control performance was evaluated in terms of the peak absolute displacements and the peak absolute accelerations which differ from each different experiment method. Among all the methods applied in this paper, Lyapunov control method turned out to be the most effective, and the passive on control and then the passive-off control method were followed in effectiveness. It was noteworthy that Lyapunov control method was specially effective in the vibration control employing a semi-active damper such MR damper in terms of economy and efficiency.
진동 제어를 위한 준능동형 압착식 스마트 MR 감쇠기의 동적 모델링
허광희 ( Heo Gwanghee ),전준용 ( Jeon Joonryong ),이규 ( Lee Giu ),이제훈 ( Lee Jaehoon ) 한국구조물진단유지관리공학회 2006 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.10 No.1
In this paper, a new MR technology is developed with squeeze smart MR damper for structural vibration control. And various performance tests and dynamic modeling are studied on identification of the dynamic characteristics of this device. This developed control device is designed for a compact large capacity by separating magnetic orifice from the main cylinder. Experimental tests are done with various dynamic loading conditions. Force-displacement hysteresis loops and force-velocity relationship curves are acquired for identification of dynamic characteristics to evaluate of the performance of this developed device. Finally, two types analytic models, based on power model and Bingham model, are investigated for the predicting of dynamic behavior for squeeze smart MR damper by comparing with experimental results.