Dynamics Analysis of Moving Load on Timoshenko Beam Surface-Mounted with Piezoelectric Layer

• Main Authors: Shao-ChiTseng, 曾紹齊
• Other Authors: Rong-Tyai Wang
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/22563068988182850113

碩士 === 國立成功大學 === 工程科學系 === 105 === The purpose of this thesis is to study the dynamic responses of moving load on cantilever beam and simply-supported beam, which has a piezoelectric sheet mounted on the bottom surface. The Timoshenko theory is adopted in this study. The displacement and rotation of all components of the entire beam are set. The displacements, stresses, strains, electric field and electric displacements are used to derive electrical enthalpy, strain energy and kinetic energy of the entire beam. The governing equations and the corresponding boundary condition are derived via the Hamilton’s principle. The natural frequencies are obtained by analytical method. Dynamic analysis is based on the method of modal analysis. The method is presented to obtain the dynamic responses of the entire beam induced by a load moving on the beam. Results show that the traveling velocity of the load and the geometric parameters of the beam significantly affect both histories of the displacement of the beam and the electric charge accumulation on the piezoelectric surface. Furthermore, the effect of vibration suppression via implementing a resistor connected both surfaces of the piezoelectric sheet will also be investigated.