Strength of Steel Shell Cylindrical Panels Reinforced with an Orthogonal Grid of Stiffeners

The paper presents an approach to the strength analysis in steel cylindrical panels reinforced from the concave side with an orthogonal grid of stiffeners. A mathematical model of the Timoshenko (Mindlin – Reissner) type is used. Transverse shears and geometric nonlinearity are taken into account. The stiffeners are introduced in two ways: using the method of refined discrete introduction (proposed by author) and the method of structural anisotropy. Computational algorithm based on the Ritz method and the best parameter continuation method. For strength analysis von Mises criterion is used. The values of the maximum permissible strength loss loads are shown for several variants of structures made of steel S345. The extension of areas of non-fulfillment of strength conditions according to the Mises criterion for the stiffened and unstiffened structures are shown.