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Dynamic responses of a piezoelectric cantilever plate under high-low excitations

查看全文 作　　者：Xiangying [1,2]Guo;Shuaibo [1,2]Wang;Lin [3]Sun;Dongxing [1,2]Cao 高影响力作者 机构地区：[1]College of Mechanical Engineering,Beijing University of Technology,Beijing,100124,China;[2]Beijing Key Laboratory of Nonlinear Vibrations and Strength of Mechanical Structures,Beijing,100124,China;[3]School of Mechanical Engineering,Liaoning Shihua University,Fushun,113001,China高影响力机构 出　　处：《Acta Mechanica Sinica》索引2020年第36卷第1期,共11页高影响力期刊 基　　金：The authors gratefully acknowledge the support of the National Natural Science Foundation of China(Grants 11572006 and 11772010);the funding project for Academic Human Resources Developmentin Institutions of Higher Learning under the Jurisdiction of Beijing Municipality(PHRIHLB). 摘　　要：In this paper,the nonlinear dynamic responses of a piezoelectric cantilever plate near the first-order and second-order natural frequencies under the action of electromechanical coupling are studied by experiments and finite element(FE)methods.The influence of different excitation frequencies on the dynamical characteristics of piezoelectric cantilever plates is analyzed with the fixed excitation amplitude.First,an experimental setup is built,including a carbon fiber cantilever plate attached to a macro fiber composite(MFC)sheet.Then,the electromechanical coupling excitations are subjected to the plate with different frequencies,which are chosen near the first and second-order natural frequencies of the plate.The piezoelectric cantilever plate has periodical motions under a lower frequency excitation,and the motions of the plate become more complex after another high frequency excitation added in the physical field.The experimental results show that the motion of the piezoelectric cantilever plate changes from stable to unstable with high-low coupled resonant frequencies.At last,the FE study is carried out to compare and verify the experimental results and the effects of isotropic and orthotropic materials on the accuracy of natural frequencies results are also compared. 关 键 词：Macro fiber composite Piezoelectric cantilever plate DYNAMICS Electromechanical coupling
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