Palkov I. Thermal strength of the interlock connection of the steam turbine blades

The dissertation on competition of a scientific degree of the candidate of the technical sciences on specialty 05.02.09 – dynamics and strength of the machines. - A. Pidhornyi Institute of Mechanical Engineering Problems of National Academy of Sciences of Ukraine, Kharkiv, 2021. The dissertation is devoted to research and evaluation of the thermal strength of the interlock connection of the blades and the disk of the first stage of the steam turbine K-500-240 to increase the operational reliability of the connection. For the analysis of the deflected mode, a technique is proposed, which is based on the use of the finite element method and taken into account the non-stationary thermal state, deformations of plasticity and creep, contact interaction of the elements, threedimensionality of the model. The results of comparison of the calculated data with the experimental ones are presented. Keywords: steam turbine, interlock connection, deformation, contact interaction, bilinear approximation, least squares method, strain gauging, finite element method.