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Information × Registration Number 0220U101777, 0115U001089 , R & D reports Title Evaluation of reliability of power equipment with fatigue damage its elements popup.stage_title Head Avramov Kostiantyn V., Доктор технічних наук Registration Date 20-02-2020 Organization A. Podgorny Institute of Mechanical Engineering Problems of the National Academy of Sciences of Ukraine popup.description2  Nonlinear oscillations of mechanical systems and their influence on the fatigue strength of power equipment are investigated. Modern asymptotic, approximate and numerical methods of the theory of dynamical systems, experimental methods for analyzing forced nonlinear oscillations of rods with cracks were used as research methods. Models of nonlinear oscillations of shell and rod structures under geometrically nonlinear deformation taking into account transverse breathing cracks have been developed. Oscillations are excited as a result of the action of periodic forces and the interaction of structures with gas flows. To study periodic oscillations and their bifurcations, the asymptotic method of many scales, the approximate method of harmonic balance, and the numerical false position method in combination with the algorithm of continuance were used. Periodic oscillations, their stability and bifurcations in shell and rod structures are studied. The combination resonance during oscillations of a rod with a transverse crack is considered. An approach to calculating the resource of turbomachine disks that perform oscillations excited by a gas stream is proposed. Product Description popup.authors popup.nrat_date 2020-04-02 Close