Tyshkovets O. Finite element analysis of turbomashine packeted blades vibrations on the basis of tree dimensions models

The vibrations of blading with shroud bandage. Development of models both improvement of natural vibration account and analysis methods of blade packets with shroud bandage; research of a spectrum of frequencies and intense condition depending on features of a design of system. Methods: a method of final elements, theory of vibrations, numerical methods of eigenproblem solution, the techniques of analysis and operating by large dimension matrixes. The method of the numerical decision of a blading natural vibration task is advanced in view of its features as systems with identical elements at construction of matrixes of weights and rigidity, which have specific block structure. It has allowed, at preservation of accuracy of results, it is essential to lower the requirements to computing resources in comparison with standard FEM procedure. Realization of the analysis of the forms of packeted blades natural vibration for the first time is offered on the basis of a superposition of the forms by separate blade. Have received development mathematical models of packeted blades, allowing taking into account an opportunity slice of bandage surfaces. The distribution of zone localization of three-dimensional stresses fields in packeted blades with various conditions of contact on bandage sides is determined and investigated, and also the qualitative dependences of natural frequencies on design features of a packet are received. The dissertation work results are used in scientific research of A.N.Podgorny Institute for Mechanical Engineering Problems of the National Academy of Sciences of Ukraine, and also are applied at turbocompressor blabing designing in "Turbo superchargers SDB", Penza. The further introduction is planned. Sphere of application are aerospace and turbomachinebuilding branches.