Vibration Analysis of Curved Sandwich Beam with Embedded Piezoelectric Structure

• Main Authors: Kun-lin Sheih, 謝昆霖
• Other Authors: Rong-Tyai Wang
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/18127954881227798391

碩士 === 國立成功大學 === 工程科學系碩博士班 === 95 === This study presents the natural frequencies and vibration suppression of curved sandwich beam partly embedded with piezoelectric material by Finite Element Method.Base on Timoshinko beam theory, the shape functions of the entire beam are obtained by solving the equations static equilibrium. The modal frequencies obtained from finite element method are compared with those of analytic method. One piezoelectric layer is used as sensor electrode, another as actuator to provide a dampimg by coupling a negative velocity feed back control algorithm in a closed loop. Newmark method is used in computing the dynamic response of entire curved beam. Further, both effects of location and length of the actuators/sensors on the vibration suppression of the beam also are investigated