A model order reduction method based on the component mode synthesis for mistuned bladed disks is introduced, with one component for the disk and one component for each blade. The interface between the components at the blade roots is reduced using the wave-based substructuring (WBS) method, which employs tuned system modes. These system modes are calculated first, and used subsequently during the reduction of the individual components, which eliminates the need to build a partially reduced intermediate model with dense matrices. For the disk, a cyclic Craig–Bampton (CB) reduction is applied. The deviations of the stiffness and mass matrices of individual disk sectors are then projected into the cyclic basis of interior and interface modes of the disk substructure. Thereby, it is possible to model small disk mistuning in addition to large mistuning of the blades.
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Reduced-Order Modeling of Bladed Disks Considering Small Mistuning of the Disk Sectors
Lukas Schwerdt,
Lukas Schwerdt
Institute of Dynamics and Vibration Research,
Leibniz Universität Hannover,
Hannover 30167, Germany
e-mail: schwerdt@ids.uni-hannover.de
Leibniz Universität Hannover,
Hannover 30167, Germany
e-mail: schwerdt@ids.uni-hannover.de
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Sebastian Willeke,
Sebastian Willeke
Institute of Dynamics and Vibration Research,
Leibniz Universität Hannover,
Hannover 30167, Germany
Leibniz Universität Hannover,
Hannover 30167, Germany
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Lars Panning-von Scheidt,
Lars Panning-von Scheidt
Institute of Dynamics and Vibration Research,
Leibniz Universität Hannover,
Hannover 30167, Germany
Leibniz Universität Hannover,
Hannover 30167, Germany
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Jörg Wallaschek
Jörg Wallaschek
Institute of Dynamics and Vibration Research,
Leibniz Universität Hannover,
Hannover 30167, Germany
Leibniz Universität Hannover,
Hannover 30167, Germany
Search for other works by this author on:
Lukas Schwerdt
Institute of Dynamics and Vibration Research,
Leibniz Universität Hannover,
Hannover 30167, Germany
e-mail: schwerdt@ids.uni-hannover.de
Leibniz Universität Hannover,
Hannover 30167, Germany
e-mail: schwerdt@ids.uni-hannover.de
Sebastian Willeke
Institute of Dynamics and Vibration Research,
Leibniz Universität Hannover,
Hannover 30167, Germany
Leibniz Universität Hannover,
Hannover 30167, Germany
Lars Panning-von Scheidt
Institute of Dynamics and Vibration Research,
Leibniz Universität Hannover,
Hannover 30167, Germany
Leibniz Universität Hannover,
Hannover 30167, Germany
Jörg Wallaschek
Institute of Dynamics and Vibration Research,
Leibniz Universität Hannover,
Hannover 30167, Germany
Leibniz Universität Hannover,
Hannover 30167, Germany
1Corresponding author.
Contributed by the Structures and Dynamics Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received June 28, 2018; final manuscript received July 16, 2018; published online December 10, 2018. Editor: Jerzy T. Sawicki.
J. Eng. Gas Turbines Power. May 2019, 141(5): 052502 (7 pages)
Published Online: December 10, 2018
Article history
Received:
June 28, 2018
Revised:
July 16, 2018
Citation
Schwerdt, L., Willeke, S., Scheidt, L. P., and Wallaschek, J. (December 10, 2018). "Reduced-Order Modeling of Bladed Disks Considering Small Mistuning of the Disk Sectors." ASME. J. Eng. Gas Turbines Power. May 2019; 141(5): 052502. https://doi.org/10.1115/1.4041071
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