Rotating blades are subjected to vibrations caused by excitation forces due to a non-homogeneous pressure field of the fluid. Therefore, damping devices like tip shrouds are implemented which reduce the vibrational amplitude and apply additional stiffness and damping to the structure. To predict the resulting vibration response and stresses, a three dimensional contact model has been developed to determine the friction forces. The resulting equations of motion are solved in the frequency domain. The developed method has been implemented in a nonlinear forced response code called DATAR designed for the gas turbine division of Siemens Energy. In this paper, the transfer of common Finite Element models of bladings with shrouds or underplatform dampers to the DATAR code is presented. A mapping procedure based on Finite Element shape functions is used to couple the model with the regular contact grid used in the nonlinear vibration analysis performed with the DATAR code. As a practical example, the vibration behavior of a gas turbine blading with interlocked shrouds is investigated with the developed method.
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ASME Turbo Expo 2008: Power for Land, Sea, and Air
June 9–13, 2008
Berlin, Germany
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-4315-4
PROCEEDINGS PAPER
Nonlinear Vibration Analysis of Gas Turbine Bladings With Shroud Coupling
Andreas Hohl,
Andreas Hohl
Leibniz Universita¨t Hannover, Hannover, Germany
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Christian Siewert,
Christian Siewert
Leibniz Universita¨t Hannover, Hannover, Germany
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Lars Panning,
Lars Panning
Leibniz Universita¨t Hannover, Hannover, Germany
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Andreas Kayser
Andreas Kayser
Siemens AG Energy, Mu¨lheim a. d. Ruhr, Germany
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Andreas Hohl
Leibniz Universita¨t Hannover, Hannover, Germany
Christian Siewert
Leibniz Universita¨t Hannover, Hannover, Germany
Lars Panning
Leibniz Universita¨t Hannover, Hannover, Germany
Andreas Kayser
Siemens AG Energy, Mu¨lheim a. d. Ruhr, Germany
Paper No:
GT2008-50787, pp. 425-433; 9 pages
Published Online:
August 3, 2009
Citation
Hohl, A, Siewert, C, Panning, L, & Kayser, A. "Nonlinear Vibration Analysis of Gas Turbine Bladings With Shroud Coupling." Proceedings of the ASME Turbo Expo 2008: Power for Land, Sea, and Air. Volume 5: Structures and Dynamics, Parts A and B. Berlin, Germany. June 9–13, 2008. pp. 425-433. ASME. https://doi.org/10.1115/GT2008-50787
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