Abstract:A higherorder beam model for tubes which can satisfy the shear stress boundary conditions on the inner and outer surfaces was applied to do the dynamic analysis of FG (functionally graded) tubes conveying fluid. By the model and according to the Hamilton’s principle, the governing equations were derived. By reserving the first order mode shape and using the multiscale method, the natural frequency and the nonlinear frequency were obtained. Numerical simulations justified the correctness of these results. Discussion on the relationship between the frequencies and the fluid’s velocity, the tube’s thickness, and the FG tube’s parameters were also performed.
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