한국전산구조공학회논문집 (Journal of the Computational Structural Engineering Institute of Korea)

  • 제16권2호
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  • Pages.183-195
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  • 2003
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  • 1229-3059(pISSN)
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  • 2287-2302(eISSN)
한국전산구조공학회 (Computational Structural Engineering Institute of Korea)
권호 표지

압전감지기와 압전작동기를 이용한 보구조물의 자유진동제어에 대한 유한요소 모형화

Finite Element Modeling for Free Vibration Control of Beam Structures using Piezoelectric Sensors and Actuators

  • 송명관 (㈜유신코퍼레이션 구조연구실) ;
  • 한인선 (한국과학기술원 건설및 환경공학과) ;
  • 김선훈 (영동대학교 건설공학부) ;
  • 최창근 (한국과학기술원 건설및 환경공학과)
  • 발행 : 2003.06.01
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초록

본 연구에서는 판형태의 압전감지기와 압전작동기가 접착되어 있는 보형태의 스마트구조물의 자유진동제어에 대한 유한요소모형화 방법을 제안한다. 압전재료의 직접압전효과와 역압전효과에 대한 구성방정식을 고려하고 변분원리를 이용하여 스마트보유한요소의 운동방정식을 유도한다. 이러한 2절점 보 유한요소근 등매개변수요소로서 Timoshenko 보이론을 기초로 한다. 따라서, 보형태의 스마트구조물을 제안하는 스마트보 유한요소에 의하여 해석함으로써 전압이 작용되는 압전작동기에 의한 구조물의 제어와 전압을 측정하는 압전감지기에 의한 구조물의 모니터링에 대한 수치적인 시뮬레이션이 가능해진다 이러한 스마트보유한요소와 Constant-gain feed back control 기법을 이용하여 압전감지기와 압전작동기를 이용한 보구조물의 자유진동제어에 대한 유한요소 모델을 제안한다

In this study, the method of the finite element modeling for free vibration control of beam-type smart structures with bonded plate-type piezoelectric sensors and actuators is proposed. Constitutive equations for the direct piezoelectric effect and converse piezoelectric effect of piezoelectric materials are considered. By using the variational principle, the equations of motion for the smart beam finite element are derived. The proposed 2-node beam finite element is an isoparametric element based on Timoshenko beam theory. Therefore, by analyzing beam-type smart structures with smart beam finite elements, it is possible to simulate the control of the structural behavior by applying voltages to piezoelectric actuators and monitoring of the structural behavior by sensing voltages of piezoelectric sensors. By using the smart beam finite element and constant-gain feed back control scheme, the formulation of the free nitration control for the beam structures with bonded plate-tyPe Piezoelectric sensors and actuators is proposed.

키워드

참고문헌

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