Morgun S. Strain-deformed state of constructional non-homogeneous turbomachine blades under vibration load.

The research subject is the process of constructional non-homogeneous blades strain-deformed state changes under the vibration load. The research object is the cooling turbomachinery blades heterogeneity influence on their strain-deformed state.The aim of the research is to establish the dependencies between the constructional heterogeneity and its influence on the blades strain-deformed state and their free oscillations frequencies spectrum.The research methods: for the mathematical model development the finite elements method in three-dimentional state is used. The experimental data have been obtained by the holographic interpherometry and strain measurement methods usage. The results attained: it has been identified the dependencies of the border conditions different types, geometrical characteristics of the blade and its cooling cavity influence on the constructional non-homogeneous turbine blades strain-deformed state. The new, more correct mathematical models and methodology for the constructional non-homogeneous turbine blades strain-deforned state and free oscillations spectrum calculation have been developed by means the special three-dimensional finite elements.he universal numerical algorithms and calculational programs have also been developed.Introduced at "Zorya"-"Mashproekt" Plant and at UkrNII TSM JSC. Area of application - enginebuilding.