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표면 부착형 PZT소자에 의해 유발된 판 구조물의 램파 전달 해석을 위한 스펙트럼 요소 정식화
임기룡(Lim, Ki-Lyong),김은진(Kim, Eun-Jin),강주성(Kang, Joo-Sung),박현우(Park, Hyun-Woo) 한국소음진동공학회 2008 한국소음진동공학회 논문집 Vol.18 No.11
This paper presents spectral element formulation which approximates Lamb wave propagation by PZT transducers bonded on a thin plate. A two layer beam model under 2-D plane strain condition is introduced to simulate high-frequency dynamic responses induced by a piezoelectric (PZT) layer rigidly bonded on a base plate. Mindlin-Herrmann and Timoshenko beam theories are employed to represent the first symmetric and anti-symmetric Lamb wave modes on a base plate, respectively. The Euler-Bernoulli beam theory and 1-D linear piezoelectricity are used to model the electro-mechanical behavior of a PZT layer. The equations of motions of a two layer beam model are derived through Hamilton's principle. The necessary boundary conditions associated with the electro-mechanical properties of a PZT layer are formulated in the context of dual functions of a PZT layer as an actuator and a sensor. General spectral shape functions of response field and the associated boundary conditions are obtained through equations of motions converted into frequency domain. Detailed spectrum element formulation for composing the dynamic stiffness matrix of a two layer beam model is presented as well. The validity of the proposed spectral element is demonstrated through numerical examples.
김영(Young Kim),임기룡(Gi-Ryong Lim),원상구(Sang-Goo Won) 한국항공우주학회 2011 한국항공우주학회 학술발표회 논문집 Vol.2011 No.11
본 연구는 스포츠급 경항공기를 위한 비행시험 계측 시스템의 소요비용과 비행시험 준비시간에 대한 예측을 이끌어 내는 것이 목적이며, 최적의 스포츠급 경항공기 비행시험 계측 인프라를 위하여 KHP TCS와 KC-100 TGS 개발기간 동안 축척된 경험을 바탕으로 작성되었다. 본 연구는 국토해양부 항공선진화사업의 연구지원(과제명:스포츠급 경항공기 개발, 1615001723)으로 수행되었다. The purpose of this research is leading to forecast the flight test setup time and the cost of the Flight Test Instrumentation(herein termed 'FIT) system for Light Sport Aircraft, (herein termed 'LSA') This research came to be made with using the experiences accumulated during KHP TGS and KC-100 TGS development period for the optimal Flight Test Instrumentation infra of LSA. And This research was supported by a grant(1615001723) from Light Sport Aircraft Development Program funded by Ministry of Land, Transport and Maritime affairs of Korean Government.