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2015全国压电和声波理论及器件技术研讨会

作者： Long-xiang DAI Shan JIANG Pei-shen LI Hong-ping HU Department of Mechanics Huazhong University of Science and Technology Hubei Key Laboratory of Engineering Structural Analysis and Safety Assessment Huazhong University of Science and Technology

A tube phononic crystal（PC）model arrayed periodically by metal and piezoelectric segments is *** piezoelectric segment consists of two piezoelectric layers connected in parallel independently by a resonant shunting *** inductor and a piezoelectric equivalent capacitor form an inductor-capacitor *** vibration of extension and flexure of the thin periodic tube structure is studied by the classical shell theory and linear piezoelectric *** electric field method and transfer matrix method are applied to solve band gap structures and transmission factor *** locally resonant band gaps and one Bragg band gap are *** interesting phenomena of interaction between two locally resonant bands are *** effects of circuit inductance,material parameters of the tube PC on these three band gaps are investigated.

关键词： Periodic tube piezoelectric phononic crystal Resonant shunting circuit Locally resonant Band gap

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WAVE LOCALIZATION IN RANDOMLY DISORDERED PERIODIC piezoelectric RODS WITH INITIAL STRESS

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Acta Mechanica Solida Sinica 2008年第6期21卷 529-535页

作者： Yize Wang Fengming Li Kikuo Kishimoto Yuesheng Wang Wenhu Huang P.O. Box 137 School of Astronautics Harbin Institute of Technology Harbin 150001 China Department of Mechanical Sciences and Engineering Tokyo Institute of Technology 2-12-1 O-okayama Meguro-ku Tokyo 152-8552 Japan Institute of Engineering Mechanics Beijing Jiaotong University Beijing 100044 China

The elastic wave localization in disordered periodic piezoelectric rods with initial stress is studied using the transfer matrix and Lyapunov exponent method. The electric field is approximated as quasi-static. The effects of the initial stress on the band gap characteristics are investigated. The numerical calculations of localization factors and localization lengths are performed. It can be observed from the results that the band structures can be tuned by exerting the suitable initial stress. For different values of the piezoelectric rod length and the elastic constant, the band structures and the localization phenomena are very different. Larger disorder degree can lead to more obvious localization phenomenon.

关键词： piezoelectric phononic crystal initial stress random disorder localization factor,localization length

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