The current work focuses on vibration and modal analysis of KufaSat structure using ANSYS 16 program. Three types of Aluminum alloys (5052-H32, 6061-T6 and 7075-T6) were selected for investigation of the structure under design loads. Finite element analysis (FEA) in design static load of 51 g was performed. The natural frequencies for five modes were estimated using modal analysis. In order to ensure that KufaSat could withstand with various conditions during launch, the Margin of safety was calculated. The results of deformation and Von Mises stress for linear buckling analysis were also performed. The comparison of data was done to select the optimum material for KufaSat structures.

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In this paper, two finite element models were performed. The fiber and matrix represented as two different materials in the first plate, while the second showed as a composite plate. The boundary conditions included clamped the plates on four ends and the dimensions of the composite plates were changed in this study. The finite element was performed and ANSYS 16.1 was employed in modeling. By comparing the results between the frequency ratio and mode numbers for different plate thickness, the results showed that natural frequencies calculated by these two model thickness of the (length/width) ratio will be more uniform and the error will be small. The numerical equations that performed from this study used to investigate the natural frequencies for longitudinal clamped composite plate.

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