Development and application of a vibration isolation system with adaptive stiffness considering potential energy

Chi Jen Chen, Tzu-Kang Lin

研究成果: Conference contribution同行評審

摘要

In recent years, a study of a semi-active isolation system named the Leverage-type Stiffness Controllable Isolation System (LSCIS) was proposed. The main concept of the LSCIS is to adjust the stiffness in the isolator for the fundamental period of the superstructure by a simple leverage mechanism. Although great performance has been achieved with the support of the least input energy method (LIEM) in far-field earthquakes, some results still reveal that the proposed system is not suitable for application in near-fault strong ground motion. To overcome this problem, two algorithms that consider the potential energy effect in the semi-active structural control system are proposed in this study. The optimal weightings between the potential and kinetic energy are first determined through a series of near-fault earthquake simulations. The proposed algorithms are then developed with the combination of the potential energy (Ep) and the kinetic energy (Ep) as the control objective to reduce the structural displacement responses efficiently. In order to demonstrate the performance of the proposed algorithm, a two-degree-of-freedom structure is used as a benchmark in both numerical simulation and experimental verification. Numerical results have shown that the dynamic response of the structure can be effectively alleviated by the proposed algorithm under both far-field and near-fault earthquakes, while the structural responses by the LIEM may be worse than the pure passive control. The feasibility of implementing the proposed system has also been experimentally verified.

原文English
主出版物標題Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2015
編輯Hoon Sohn, Kon-Well Wang, Jerome P. Lynch
發行者SPIE
ISBN(電子)9781628415384
DOIs
出版狀態Published - 27 三月 2015
事件Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2015 - San Diego, United States
持續時間: 9 三月 201512 三月 2015

出版系列

名字Proceedings of SPIE - The International Society for Optical Engineering
9435
ISSN(列印)0277-786X
ISSN(電子)1996-756X

Conference

ConferenceSensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2015
國家/地區United States
城市San Diego
期間9/03/1512/03/15

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