Computer modelling and regression analysis of steam turbine blade deformation under high-temperature creep

Keywords

steam turbine, rotor blade, creep, finite element method, high-temperature deformation, regression analysis, durability.

Cite as

Bao Chengao, Hembara T. V., and Firman V. M. Computer modelling and regression analysis of steam turbine blade deformation under high-temperature creep. Physicochemical Mechanics of Materials. 2026. 62(2), 091-097.

https://doi.org/10.15407/pcmm2026.02.091

Abstract

The results of computer modeling of the stress-strain state of a fragment of a steam turbine blade made of corrosion-resistant 08Cr18Ni10Ti steel under conditions of high-temperature and long-term static loading are presented. The analysis is carried out using the finite element method in the ANSYS software environment based on a three-dimensional model which reproduces the real geometry of the working part of the blade. The distributions of equivalent stresses and time-dependent creep strains are determined, and the influence of temperature and steam pressure on the creep intensity are analyzed. The maximum creep strains are localized in the root region of the blade, where elastic strain energy is concentrated. To improve the accuracy of prediction, the obtained results were additionally analyzed using regression-based machine learning methods, which made it possible to clarify the influence of the main parameters on creep intensity and to assess the long-term serviceability of turbomachinery components.

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