Kairov V. Strain-deformed state of the atteched constructional non-homogeneous shells with holes and solid detached bodies under dynamic loading.

The research subject is the processes of attached constructional non-homogeneous shells with holes and solid detached bodies strain-deformed state and oscillations changes under dynamic load. The research object is the influence of the attached ribs, holes and solid detached bodies on the thin, elastic constructional non-homogeneous shells oscillations and stress-strained state. The aim of the research is the thin cylindrical shells dynamic behavior investigation methodology development and the establishment of the dependencies between the constructional heterogeneity and its influence on the shells stress-strained state and their free oscillations frequencies and amplitudes characteristics. The research methods: for the mathematical model development the finite elements method in three-dimentional state and the Lagrange variational principle are used. The experimental data have been obtained by the holographic interpherometry measurement methods usage. The results attained: it has been identified the dependencies of the border conditions different types, geometrical characteristics of the shell’s holes, attached ribs and solid detached bodies influence on the constructional non-homogeneous shellss stress-strained state and free oscillations. The new, more correct mathematical models and methodology for the constructional non-homogeneous shells strain-deforned state and free oscillations spectrum calculation have been developed by means of the special isoparametric finite elements. The universal numerical algorithms and calculational programs have also been developed. Introduced at «Zorya»-«Mashproekt» Plant, at UkrNII TSM JSC, and at State Shipbuilding Yard named after «61 Communars». Area of application – enginebuilding, shipbuilding, rocketry and aircraft technic.