High-fidelity sensitivity analysis of modal properties of mistuned bladed disks regarding material anisotropy

Koscso, Adam, Dhondt, Guido and Petrov, Yevgen (2018) High-fidelity sensitivity analysis of modal properties of mistuned bladed disks regarding material anisotropy. Journal of Engineering for Gas Turbines And Power, 141 (2). 021036 1-11. ISSN 0742-4795

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Abstract

A new method has been developed for sensitivity calculations of modal characteristics of bladed disks made of anisotropic materials. The method allows the determination of the sensitivity of the natural frequencies and mode shapes of mistuned bladed disks with respect to anisotropy angles that define the crystal orientation of the monocrystalline blades using fullscale finite element models. An enhanced method is proposed to provide high accuracy for the sensitivity analysis of mode shapes. An approach has also been developed for transforming the modal sensitivities to coordinate systems used in industry for description of the blade anisotropy orientations.

The capabilities of the developed methods are demonstrated on examples of a single blade and a mistuned realistic bladed disk finite element models. The modal sensitivity of mistuned bladed disks to anisotropic material orientation is thoroughly studied.

Item Type: Article
Keywords: sensitivity, natural frequencies, mode shapes, anisotropic material, finite elements, mistuning
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Research Centres and Groups: Dynamics, Control and Vehicle Research Group
Subjects: T Technology > TJ Mechanical engineering and machinery
T Technology > TL Motor vehicles. Aeronautics. Astronautics
Depositing User: Yevgen Petrov
Date Deposited: 16 Jul 2018 11:37
Last Modified: 30 May 2019 01:00
URI: http://sro.sussex.ac.uk/id/eprint/77194

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