THE DYNAMIC BUCKLING OF CYLINDRICAL SHELLS UNDER COSINOIDAL IMPULSE

摘要

The dynamic plastic buckling of cylindrical shells which are subjected to a local nonuniform shock loading is studied by using an energy criterion.Both the elastic rotational spring and displaced spring are used respectively to model the influence of the non-buckling parts on the buckling parts on a shell.Calculating formulas for the critical mode and the critical velocity are derived and the calculating results are compared with the corresponding experimental results.The effects of two kinds of spring boundary conditions on the plastic buckling are analyzed.