Stability of articulated-movable supported perforated shells

The article considers sloping shell structures of rectangular design. The shells are made from orthotropic composite materials, articulated-movable supported on the contour, and weakened with holes. Two mathematical models of deformation of such structures have been developed: taking into account the discrete input of holes and with using the constructive anisotropy method. The shell stability calculation has been carried out, using three different geometries of shells which were made of 4 composite materials. Thus, altogether 12 structures have been investigated. It is shown that with an increase in the number of holes, the results obtained by the constructive anisotropy method coincide with the results obtained with the discrete introduction of holes.