Degtiarenko P. Stress-strain state and numerical modelling forced structures of airspace machinebuilding

Dissertation work is devoted to creation of analytical and numerical approach for stress-strain and buckling analysis of reinforced shell structures of complicated geometrical forms under static combined loading with influence of circular ribs discreteness. Using method of initial parameters in matrix form and asymptotic methods the approach for solution of buckling problems for shell structures type “cylinder-cone” is proposed. Mathematical model of deformation ring stiffeners shell structures and numerical analysis for various structures configuration is discussed. On the basis of numerical calculation boundary curves, which separate stable region structure from unstable, are given. The algorithm of numerical calculations of rational parameters of reinforced shell structures with respect to local and global buckling shapes for “barrel-ogive” structure is proposed.