| Summary: | 碩士 === 國立成功大學 === 工程科學系碩博士班 === 100 === The purpose of this thesis is the study of the bonding layer effect on dynamic response of composite beam with surface mounted piezoelectric material, based on the Timoshenko beam theory without considering the damping and temperature effects. The structure is divided into three spans; the use of the displacement field is deduced from the relationship between strain, stress and momentum. The equation of motion by Hamilton’s principle uses the modal analysis to obtain the natural frequency and its corresponding mode shape functions, where the first and third spans are composite structures. The second span section is divided into two forms, with and without a bonding layer; the sandwich structure without a bonding layer is made up of piezoelectric materials and composite materials while the other one is made up of piezoelectric materials, adhesives and composites. Calculations are done in two different forms, the solution of displacement functions of beams using orthogonally modal shape functions and the expansion theorem using the mathematical computing software. Finally, there is the analog data in a variety of geometric conditions, such as the length of the first and second span, the thickness of the bonding layer, the composite fiber angle and the thickness of the piezoelectric layer simulated by a vibrating external force. Analyze the dynamic response of beams with and without bonding layer, and propose the conclusions and suggestions.
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