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Mathematical model and boundary conditions in stress analysis relating to steam turbine rotors, under transient operating conditions
Author(s) -
Di Pasquantonio F.,
Macchi A.
Publication year - 1976
Publication title -
international journal for numerical methods in engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.421
H-Index - 168
eISSN - 1097-0207
pISSN - 0029-5981
DOI - 10.1002/nme.1620100207
Subject(s) - thermoelastic damping , transient (computer programming) , boundary value problem , finite element method , stress (linguistics) , steam turbine , boundary (topology) , mechanics , transient response , thermal , structural engineering , turbine , engineering , mathematics , mechanical engineering , computer science , mathematical analysis , physics , thermodynamics , linguistics , philosophy , electrical engineering , operating system
An appropriate mathematical model for calculation of thermoelastic stress in steam turbine rotors, under transient operating conditions, is developed in the framework of so called uncoupled quasi‐static theory. The numerical analysis has been carried out by means of the finite element code ANGUS, the accuracy of which has been evaluated by comparing it with an analytical solution given by one of the authors in Reference 2. It has been shown that, with an appropriate choice of thermal and elastic boundary conditions, it is possible to carry out stress transient analysis considering only a segment of the hottest zone of high or intermediate pressure body of rotors. The paper includes a comparison study of the influence of two types of thermal boundary conditions in the labyrinth glands.