2012-08-012024-05-18https://scholars.lib.ntu.edu.tw/handle/123456789/710649摘要：本計畫為三年計畫，將探討應用性頗廣的壓電板與殼陶瓷材料元件面內及面外運動耦合的振動問題，以及其所引發壓電材料溫度驟升的情況，由於驅動壓電陶瓷材料的面內振動往往需輸入相當大的電壓，且往往在高頻時作激發，使得壓電陶瓷材料處於高溫疲勞的環境中，而壓電陶瓷是屬於脆性材料，故在此高溫疲勞的環境中極易於裂紋的產生及擴展。而壓電陶瓷材料中的裂紋除了對於結構的安全及可靠度產生影響外，其佈於壓電陶瓷表面的電極也因裂紋而破壞其完整性，這對於壓電陶瓷材料振動特性以及元件的可靠性及耐久性影響甚大，此方面的研究亦少有相關文獻作深入之探討。而在壓電陶瓷材料兩面鍍上不同電極分佈以作激振的電極設計也將影響板殼壓電元件的動態特性。故本計畫亦將涵蓋電極設計對板殼壓電元件振動的影響探討。計畫中亦將建立一套完整的壓電陶瓷材料製程與壓電材料常數之量測方法，其結果可幫助對於壓電元件的動態行為了解並提供正確的設計及分析壓電元件的特性，實驗主要以電子斑點干涉術的實驗方法對壓電材料板作全域性的面內及面外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，以及應用溫度儀量測各不同共振頻率時之溫度變化。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殼狀元件在不同電極設計所引發的面內及面外耦合振動及溫度變化作完整的探討，以便理論、數值及實驗能互相驗證。<br> Abstract: The temperature in the piezoceramic specimen will increase rapidly with a short time period for high frequency resonant vibration. The design of the electrode on the two surfaces of the piezoceramic plate will influence the dynamic characteristics of the piezoceramic device and there are very few results available in the literature. In this three-year project, we employ an optical interferometry method called the amplitude-fluctuation electronic speckle pattern interferometry (AF-ESPI) to investigate the vibration characteristics of piezoceramic devices with different electrode design. 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. This project will focus on the dynamic characteristics of piezoelectric device (i.e., composite piezoceramic plate and shell) that the in-plane and out-of-plane modes are coupled. The influence of the electrode and temperature effect on the resonant vibration of piezoceramic devices will be discussed in detail. This project will also provide a reliable method for the determination of the material constants for piezoceramic material. The numerical finite element calculations are performed, and the results will be compared with the experimental measurements.電子斑點干涉術溫度壓電陶瓷板共振頻率模態耦合ESPItemperaturepiezoceramic plateresonant frequencymode shapecoupled