2005-08-012024-05-18https://scholars.lib.ntu.edu.tw/handle/123456789/714630摘要：根據壓電材料振動分析的相關文獻所知大部分的學術論文探討壓電材料在空氣中的振動問題，甚少有相關研究討論壓電材料在液體中的振動特性，尤其是實驗方面的資料更是少見。本計畫將探討應用性頗廣的壓電陶瓷材料以及壓電雙晶片在空氣中以及液體中的振動問題，而此方面的研究亦少有相關文獻作深入之探討，且實驗量測的困難性與複雜性也較大。本研究計畫將整合且有系統地包含理論建立、數值計算以及實驗量測，針對壓電陶瓷材料板及壓電雙晶片在不同液體中的動態特性下作完整的探討，以便理論、數值及實驗能互相驗證。實驗主要以電子斑點干涉術的實驗方法對壓電材料板及壓電雙晶片作全域性的面外及面內振動模態以及共振頻率量測，並配合雷射都卜勒振動儀及阻抗分析的結果作深入之探討，除此之外亦將應用有限元素數值計算作相關問題的理論研究並與實驗結果作比較。本研究計畫為兩年期計畫，第一年主要探討壓電陶瓷長方板在空氣中及在不同液體的振動特性，第二年則討論壓電雙晶片在空氣中及在不同液體中的振動特性<br> Abstract: There are many papers investigate the vibration characteristics of the piezoelectric materials in air. However, there is very few results available in the literature discuss the case of the piezoelectric material in fluid. The experimental measurement of resonant frequencies for the piezoceramic plate is generally performed by the impedance analysis. In this project, we employ an optical interferometry method called the amplitude-fluctuation electronic speckle pattern interferometry (AF-ESPI) to investigate the vibration characteristics of piezoceramic plates and piezoelectric bimorph in air and in fluid. As compared with the film recording and optical reconstruction procedures used for holographic interferometry, the interferometric fringes of AF-ESPI are produced instantly by a video recording system. Based on the fact that clear fringe patterns measured by the AF-ESPI method will be shown only at resonant frequencies, both the resonant frequencies and corresponding mode shapes are obtained experimentally at the same time. The out-of-plane and in-plane vibration modes of piezoceramic plates and piezoelectric bimorph will be discussed in this project. The numerical finite element calculations are also performed, and the results will be compared with the experimental measurements. This is a two-year project, the first year in focused on the piezoceramic plate and the second year investigate the piezoelectric bimorph.電子斑點干涉術壓電陶瓷板壓電雙晶片液體共振頻率模態ESPIpiezoceramic platepiezoelectric bimorphfluidresonant frequencymode shape.