Comparison of the linear and nonlinear cumulative damage theories in transient analysis of a tuned and mistuned turbine blades

• Autorzy: Rządkowski, R.
• Języki publikacji: EN

Abstrakty

EN

Mechanical vibrations in turbine stages are one of the most significant reasons for a failure of bladed discs assemblies in turbines and compressors. A numerical example of a transient analysis during a run-up and a run-down process and the estimated fatigue life of the tuned and the mistuned bladed discs are presented. Life estimates are made using the linear and nonlinear cumulative damage theories and a comparison of the results is presented. It is done in order to show the importance of the consideration of the detuned system and the differences between the tuned bladed disc analysis. The blade is modelled on a basis of extended beam theory including a bending-bending-torsional vibration. The disc modelled by the moderately thick plate theory. The equation of motion is obtained by using the extended Hamiltons principle and the Ritz method.

Słowa kluczowe

EN

linear and nonlinear cumulative; tuned and mistuned turbine

• Czasopismo: Transactions of the Institute of Fluid-Flow Machinery
• Rocznik: 2003
• Tom: nr 112
• Strony: 155-170
• Opis fizyczny: Bibliogr. 24 poz., rys., tab.

Twórcy

autor

Rządkowski, R.

• Institute of Fluid-Flow Machinery, PAS Gdańsk, Poland, Polish Naval Academy, Gdynia, Poland

Bibliografia

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