Frequencies and modes of rotating flexible shrouded bladed discs-shaft assemblies

• Autorzy: Sokołowski J. , Rządkowski R. , Kwapisz L.
• Języki publikacji: EN

Abstrakty

EN

It is now increasingly necessary to predict accurately, at the design stage and without excessive computing costs, the dynamic behaviour of rotating parts of turbomachines, so that resonant conditions at operating speeds are avoided. In this study, global rotating mode shapes of flexible shrouded bladed disc-shaft assemblies are calculated. The rotating modes have been calculated by using a finite element cyclic symmetry approach. Rotational effects, such as centrifugal stiffening have been accounted for, and all the possible couplings between the flexible parts have been allowed. Gyroscopic effects have been neglected. The numerical results have been compared with the experimental. The calculations show the influence of shaft flexibility on the natural frequencies of shrouded bladed discs up to four nodal diameters for the two first frequencies series.

Słowa kluczowe

EN

blades; discs; shaft; free vibration

• Wydawca: Politechnika Gdańska
• Czasopismo: TASK Quarterly : scientific bulletin of Academic Computer Centre in Gdansk
• Rocznik: 2003
• Tom: Vol. 7, No 2
• Strony: 215--231
• Opis fizyczny: Bibliogr. 15 poz., rys., tab.

Twórcy

autor

Sokołowski J.

• Department of Dynamics of Machines, Institute of Fluid Flow Machinery, Polish Academy of Sciences, J. Fiszera 14, 80-952 Gdansk, Poland

autor

Rządkowski R.

• Department of Dynamics of Machines, Institute of Fluid Flow Machinery, Polish Academy of Sciences, J. Fiszera 14, 80-952 Gdansk, Poland
• Polish Naval Academy, Śmidowicza 71, 81-919 Gdynia, Poland

autor

Kwapisz L.

• Department of Dynamics of Machines, Institute of Fluid Flow Machinery, Polish Academy of Sciences, J. Fiszera 14, 80-952 Gdansk, Poland

• Department of Dynamics of Machines, Institute of Fluid Machinery, Polish Academy of Sciences, J. Fiszera 14, 80-952 Gdańsk, Poland,

Bibliografia

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