Аннотация
An effective model for layer-by-layer analysis of the stress-strain state in the general case of irregular three-layer cylindrical shells is proposed, which made it possible for the first time to study three-layer structures weakened by rectangular cutouts in a sufficiently accurate formulation. The use of the constructed block model, consisting of two-dimensional moment bearing layers and a three-dimensional filler layer, significantly expands the class of solvable current scientific and applied problems in the strength calculation of promising three-layer structural elements. As an example, the influence of the thickness of the supporting layer to which the load is applied on the stress-strain state in the layers of three-layer cylindrical sections weakened by rectangular cutouts in plan was investigated for the first time.