Elastic buckling of internally pressurized imperfect torispherical shell

摘要

The elastic stability of an imperfect torispherical shell subjected to internal pressure was analyzed numerically using the finite element method. Imperfection patterns affine to the buckling mode in the bifurcation points of the perfect structure were studied and internal pressure-nodal displacement curves obtained for the pre- and postbuckling regions of the computation model. The effect of the imperfection pattern amplitude on the critical pressure and the postbuckling minimum was analyzed. The imperfection sensitivity was presented graphically.