Methods of calculating evolution of the stress-strain state of the equipment of nuclear power plants taking into account the destruction of areas of action of seismic loads

Designed iterative-analytical theory of spatial multi-layer constructions in view of the possible destruction of the material layers of shells. A mathematical model of crack propagation in the construction of nuclear power plants, taking into account the basic parameters of the seismic loading containments and NPP equipment. An geometrically and physically nonlinear equations.