| Summary: | 碩士 === 國立成功大學 === 土木工程學系碩博士班 === 98 === Because of the composite laminated plates possess excellent characteristics such as high strength, high stiffness, lightweight, and low thermal conductivity, they have been widely used in advanced industrial engineering structures. To avoid structures producing resonance phenomenon and to make materials exceeding the limits allowed, structural analysis of natural frequency becomes the standard on structural design.
In this thesis, ABAQUS finite element software is used to analyze the influence of arc angle, hole size, fiber orientations, geometric shapes and axial pressure on the maximum fundamental frequencies of composite laminated curved panel. The Fibonacci search is employed to find the optimal fiber orientations and its corresponding maximum fundamental frequency in the composite laminated curved panel.
The results of the analyses show that the maximum fundamental frequency not only reduces with the increase of the axial pressure and the panel aspect ratio but also increases with the increase of hole size and arc angle. Therefore, choosing laminates fiber angle and suitable geometry can improve the fundamental frequency. So, it is useful in the design of composite curved panels in the future.
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