Reducing Vibration of A Rotating Beam By Using The Coupled Piezoelectric Dynamic Absorbers

• Main Authors: Kuang-Chun Lee, 李光君
• Other Authors: 黃以玫
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/52169354346703025084

碩士 === 國立中央大學 === 機械工程研究所 === 95 === The purpose of this thesis is to reduce the vibration of a rotating beam by using the coupled piezoelectric dynamic absorbers. A rotating Rayleigh beam with simply supported ends subject to an external harmonic force is considered. Piezoelectric coupling absorbers are attached to the surface of the beam. The frequency of the external harmonic force is chosen equal to the rotating frequency of the beam. Each absorber is made of two pieces of piezoelectric material connected to passive electric components. Two absorbers are further coupled via a resistor or an inductor. The equations of motion of the composite rotating beam are derived by Hamilton’s principle and decretized by Galerkin’s method. The dynamic responses of the beam subjected to the harmonic force are solved. Various designs of coupled piezoelectric absorbers are discussed in this thesis. The numerical results show that the coupled absorbers are effective for reducing the vibration of the rotating beam.