Dynamic analysis of laminated composite double cylindrical and conical shells with bulkheads using meshfree method

In this paper, the free vibration and dynamic response of laminated composite double cylindrical and conical shells with bulkheads are investigated by means of the meshfree method. The laminated composite double conical shell with bulkheads (DCOSB) is divided into several conical shells and annular plates to ensure the numerical stability. The theoretical formulation of the individual segment is established by using the energy principle in framework of first order shear deformation theory (FSDT). The displacement components of each segment are approximated by a meshfree shape function along the meridional direction and Fourier series for the circumferential direction. The formulation of entire system are derived by using coupling conditions obtained through the geometrical relations between the segments. The double cylindrical shell with bulkheads (DCYSB) is considered as a DCOSB with semi-vertex angle of α = 0. The harmonic load and stationary stochastic excitation are considered as the external force. Convergence and verification studies are performed to confirm the reliability and accuracy of the present formulation. Satisfactory agreements are achieved between the numerical results by the proposed method and those from the published literature. Finally, the effect of some parameters on the free vibration and dynamic response of laminated composite DCYSB and DCOSB is presented.