Dynamic response of a composed shell under explosive load

The response of a nuclear containment which is a shell structure composed of a cylindrical shell and a spherical one under a chemical explosive load is presented in this paper. The shell is separated into finite ring-elements. For every element the unknown displacements are expressed with Fourier series expanded in circumferential direction of the shell and with Hermite interpolation in shell axis (meridional direction). By means of HamiIton's principle the dynamic equation of an element can be formed. The total dynamic equations are solved by Wilson - θ method. A numerical example for containment is analysed. The computational results are compared with the engineering design values under the SSE (safe shutdown earthquake) load