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Reduced-Order Modeling of Bladed Disks Considering Small Mistuning of the Disk Sectors

Schwerdt, Lukas ; Willeke, Sebastian ; Scheidt, Lars Panning-von ; Wallaschek, Jörg

Journal of engineering for gas turbines and power, 2019-05, Vol.141 (5) [Periódico revisado por pares]

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Título:
Reduced-Order Modeling of Bladed Disks Considering Small Mistuning of the Disk Sectors
Autor: Schwerdt, Lukas ; Willeke, Sebastian ; Scheidt, Lars Panning-von ; Wallaschek, Jörg
Assuntos: Gas Turbines: Structures and Dynamics
É parte de: Journal of engineering for gas turbines and power, 2019-05, Vol.141 (5)
Notas: 052502
Descrição: 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.
Editor: ASME
Idioma: Inglês

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