Dynamic analysis of the control stage of a high speed steam turbine

• Autorzy: Sławiński D. , Zakrzewski W.
• Języki publikacji: EN

Abstrakty

EN

This paper analyzes the possibility of resonances within a control stage of a high speed turbine. An original method for steady state operation is used for the analysis of the stiffness matrix representing: initial displacement blade (nominal shape blade obtained by nominal working point of turbine) and residual stresses following local crossing yield plastic strain. In the analysis there has been found a possibility of occurance of the resonance frequency, and mistuning by showing the safe working ranges. The calculation used the 3D modal and harmonic analysis within computational solid dynamics (CSD) and the results were compared with the 0D data from literature. After local crossing of yields stresses, on the basis of the harmonic analysis, there has been shown operation of the blade in the resonance point. Before crossing the yield stresses the blade is working in mistuning and a safe point.

Słowa kluczowe

EN

control stage; residual stresses; initial displacement blade; vibrations blade

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN
• Czasopismo: Transactions of the Institute of Fluid-Flow Machinery
• Rocznik: 2012
• Tom: nr 124
• Strony: 41--49
• Opis fizyczny: Bibliogr. 17 poz., rys., tab.

Twórcy

autor

Sławiński D.

• The Szewalski Institute of Fluid-Flow Machinery of the Polish Academy of Sciences, Centre for Thermomechanics of Fluids, Energy Conversion Department, Fiszera 14, 80-231 Gdańsk, Poland

autor

Zakrzewski W.

• The Szewalski Institute of Fluid-Flow Machinery of the Polish Academy of Sciences, Centre for Thermomechanics of Fluids, Energy Conversion Department, Fiszera 14, 80-231 Gdańsk, Poland

Bibliografia

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