Dynamic Analysis of a Composite Beam with One-Sided Surface Mounted Piezoelectric Material under the Moving Load Effect

• Main Authors: Yi-ChengLai, 賴逸丞
• Other Authors: Rong-Tyai Wang
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/37555021500251124941

碩士 === 國立成功大學 === 工程科學系 === 104 === The purpose of this thesis is to study the dynamic responses of a composite beam, which has a piezoelectric sheet mounted on the bottom surface, under the moving load effect. The Timoshenko theory is adopted in this study. The composite beam is regarded as a three-span beam and each span has top and bottom components. The lower layer of the second span is a piezoelectric material. All the other parts are composite material. The total electric enthalpy and kinetic energy of the entire beam are obtained with displacements, stresses and strains. The governing equations and the corresponding boundary condition are derived via by Hamilton’s principle. The method of modal analysis is presented to obtain the dynamic responses of the entire beam induced by a load moving on the beam. The effects of traveling velocity of the load and the geometric parameters of the beam on both histories of the displacement of the beam and the electric charge accumulation on the piezoelectric surfaces are investigated.