Identification of Inertia, Damping, and Stiffness Parameters for Low-Pressure Steam Turbine Frame

• Autorzy: Krawczuk, M. , Murawski, L. , Ostachowicz, W.
• Języki publikacji: EN

Abstrakty

EN

The paper deals with modern methods of investigating the low-pressure frame of a steam turbine. The objective of this paper is to estimate typical parameters of the low-pressure frame of a steam turbine. The numerical calculations are presented for the frame of 200 MW low-pressure turbine. In particular, methods of calculating inertia, damping, and stiffness parameters are investigated. These data form a basis for new symptoms of the turbine technical condition. The identification process uses dynamic amplitude-frequency and phase-frequency characteristics. Those parameters are estimated using a finite element method approach, which calculates the dynamic flexibility of the structure. Natural frequencies and modes are determined for the turbine frame. The paper describes a physical and numerical model of the frame as well the results of calculations for the above-mentioned inertia, damping, and stiffness matrix.

Słowa kluczowe

EN

steam turbine frame; identification of dynamic parameters

• Czasopismo: Machine Dynamics Problems
• Rocznik: 2003
• Tom: Vol. 27, No. 1
• Strony: 41-54
• Opis fizyczny: Bibliogr. 7 poz.

Twórcy

autor

Krawczuk, M.

• Institute of Fluid-Flow Machinery Polish Academy of Sciences, Gdańsk,
• Technical University of Gdańsk, Faculty of Electric and Control Engineering, Gdańsk

autor

Murawski, L.

• Ship Design and Research Center, Gdańsk,

autor

Ostachowicz, W.

• Technical University of Gdańsk, Faculty of Electric and Control Engineering, Gdańsk,

Bibliografia

• 1. Desai, C.S., Abel J.F., 1972, Introduction to the Finite Element Method, Van Nostrand Reinhold Company, New York.
• 2. Giergiel, J., Uhl, T., 1990, Identyfikacja Układów Mechanicznych. PWN, Warszawa.
• 3. Krawczuk, M., Murawski, L., Ostachowicz, W., 2002, Identyfikacja Parametrów Masowo-Tłumiąco-Sztywnościowych Kadłuba Części NP Turbiny, Raport Instytutu Maszyn Przepływowych PAN, Gdańsk, Nr arch. 2169/2002.
• 4. Łączkowski, R., 1974 , Drgania Elementów Turbin Parowych, WNT, Warszawa.
• 5. NASTRAN User Manuals, 2001.
• 6. Orłowski, Z., Galka, T., 1996, Steam turbine diagnostics employing modal analysis. Mecanique Industrielle et Materiaux, 49 (3), 143-145.
• 7. Rao, S.S., 1989, The Finite Element Method in Engineering, Pergamon Press, Oxford.