FREE VIBRATION ANALYSIS OF ROTATING LAMINATED CYLINDRICAL SHELLS UNDER DIFFERENT BOUNDARY CONDITIONS USING A COMBINATION OF THE LAYERWISE THEORY AND WAVE PROPAGATION APPROACH

Abstract. In this paper, vibration analysis of rotating laminated composite cylindrical shells using a combination of the layerwise theory and wave propagation approach is investigated. This combination enables us to study all the conventional boundary conditions in our analysis. Results obtained have been compared with those available in the literature and a good agreement has been observed. In contrast to the Equivalent Single Layer theories (ESL), the layerwise theory is constructed on the basis of C0- continuity through the laminate thickness. For the surface of the shell, a displacement eld based on the wave propagation approach is proposed. The eect of Coriolis and centrifugal accelerations on the circumferential and longitudinal modes is investigated. At high rotational speeds, the stationary frequency is smaller than both the forward and backward frequencies and this dierence increases with the increase of rotational speed. The in uence of boundary conditions on the frequencies is more signi cant at lower circumferential modes but at higher modes the eect of the boundary condition is in nitesimal.