Whole-field Vibration Measurement and Parameter Estimation of Composite Plates by ESPI

• Main Authors: Lin, Chan-Chiao, 林湛喬
• Other Authors: Ma Chien-Ching
• Format: Others
• Language: zh-TW
• Published: 1997
• Online Access: http://ndltd.ncl.edu.tw/handle/53742345222492086146

碩士 === 國立臺灣大學 === 機械工程學系 === 85 === Because of the characteristics of low weight and high strength, composites are gradually applied to many fields. In this paper, we use Electronic Speckle Pattern Interferometry (ESPI) for static and vibration investigations of composite plates. The results are compared with theoretical and numerical results. In addition, we develope a method of inverse evaluation the elastic constants of composite plates through vibration measurement of ESPI. We set up an ESPI system to find natural frequencies and mode shBesides, we also use ESPI to investigate three dimensional vibration of piezoelectric transducer. Not only the natural frequencies but also the out-of-plane and in-plane vibration mode shapes are successfully obtained. It reveals a good agreement with the result of impedance analysis and validates the finite element model.