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Numerical Study of Hybrid Base-isolator with Magnetorheological Damper and Friction Pendulum System

MR 감쇠기와 FPS를 이용한 하이브리드 면진장치의 수치해석적 연구

Kim, Hyun-Su;Roschke, P.N.
김현수

  • Published : 2005.04.01

Abstract

Numerical analysis model is proposed to predict the dynamic behavior of a single-degree-of-freedom structure that is equipped with hybrid base isolation system. Hybrid base isolation system is composed of friction pendulum systems (FPS) and a magnetorheological (MR) damper. A neuro-fuzzy model is used to represent dynamic behavior of the MR damper. Fuzzy model of the MR damper is trained by ANFIS (Adaptive Neuro-Fuzzy Inference System) using various displacement, velocity, and voltage combinations that are obtained from a series of performance tests. Modelling of the FPS is carried out with a nonlinear analytical equation that is derived in this study and neuro-fuzzy training. Fuzzy logic controller is employed to control the command voltage that is sent to MR damper. The dynamic responses of experimental structure subjected to various earthquake excitations are compared with numerically simulated results using neuro-fuzzy modeling method. Numerical simulation using neuro-fuzzy models of the MR damper and FPS predict response of the hybrid base isolation system very well.

Keywords

base-isolation;fuzzy control;neuro-fuzzy Inference;MR damper;friction pendulum system

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