DYNAMIC AND STATIC BUCKLING OF SHORT CYLINDRICAL SHELL UNDER TRANSVERSE SHEAR LOAD

摘要

In this paper, the vibrating eigen frequencies and eigen modes of the short cylinder are obtained by modal analysis of 3D finite element model and Fourier mode expansion method. And then, static buckling characteristics of the cylinder under transverse shear load are presented by estimating firstly with a simple expression and subsequently by linear and nonlinear buckling analyses. Based on above analyses, the shear dynamic buckling of the cylinder are explored, and dynamic instability regions are supplied, which appear at very high frequency domains and mainly caused by combination resonance of the cross-couplings between circumferential and axial modes. It is concluded that it is extremely hard to identify the dynamic buckling of the short cylinder with shear excitation generated by shaking table or actuator.