earticle

영어

The conventional design process for optimal location and capacity of dampers have some limitations in the light of efficient and economic design. In this study, it is proposed a more efficient damper design methodology by incorporating linear matrix inequality(LMI) under the assumption that the design of passive vibration control system can be equivalent to active control algorithm. For this purpose, it is shown that the damper capacity can be identical to the control gain of the output feedback, which is one of the active control algorithms, and the damper capacity can be estimated more efficiently by converting the control problem into the LMI problem. In order to verify the design process, the damper capacity was estimated for the 20-story structure by LMI technique, and the performance improvement was investigated by nonlinear dynamic analysis of the structure. Numerical results show that the damper capacity is determined similarly to the drift of the contributing mode, and the vibration reduction was satisfactory even at 80% of the total capacity which damper systems are installed in all floors.