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Strength of Materials

, Volume 46, Issue 4, pp 483–492 | Cite as

Influence of the Circumferential Non-Uniformity in the Material Mechanical Properties on the Deformation of Rotors of Power-Generating Units

  • N. G. Shul’zhenkoEmail author
  • P. P. Gontarovskii
  • T. V. Protasova
Article

The paper considers the irreversible deformation of steam turbine rotors due to the circumferential non-uniformity of the material mechanical properties based on the numerical analysis of their three-dimensional stress-strain state. It is shown that this non-uniformity can be one of the causes for the occurrence and development of progressive creep deflection of high-temperature rotors that have been in long-term operation and also their bending in case of excess of the rated rotational speed.

Keywords

steam turbine rotor circumferential non-uniformity of the material’s mechanical properties nonaxisymmetric deformation rotor deflection semi-analytical finite element method 

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • N. G. Shul’zhenko
    • 1
    Email author
  • P. P. Gontarovskii
    • 1
  • T. V. Protasova
    • 1
  1. 1.Podgornyi Institute of Problems of Mechanical EngineeringNational Academy of Sciences of UkraineKharkovUkraine

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