Sensitivity and forced response analysis of anisotropy-mistuned bladed disks with nonlinear contact interfaces

Koscso, Adam and Petrov, Evgeny (2019) Sensitivity and forced response analysis of anisotropy-mistuned bladed disks with nonlinear contact interfaces. Journal of Engineering for Gas Turbines and Power, 141 (10). p. 101025. ISSN 0742-4795

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Abstract

A new method has been developed for the analysis of nonlinear forced response of bladed disks mistuned by blade anisotropy scatter and for the forced response sensitivity to blade material anisotropy orientations. The approach allows for the calculation of bladed disks with nonlinear friction contact interfaces using the multi-harmonic balance method. The method uses efficient high-accuracy model reduction method for the minimization of the computational effort while providing required accuracy. The capabilities of the developed methods are validated and demonstrated using a two-blade model. A thorough study of the influence of the material anisotropy mistuning and its sensitivity on the characteristics of the forced response is carried out using finite element modes of anisotropy mistuned realistic bladed disk with nonlinear friction joints of blade roots and shroud contacts. The dependency of the nonlinear forced response on excitation level and contact pressure values has been carried out for anisotropy mistuned bladed disks.

Item Type: Article
Keywords: Bladed disk, nonlinear vibration, material anisotropy, friction, contacts
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
Depositing User: Yevgen Petrov
Date Deposited: 12 Sep 2019 09:58
Last Modified: 16 Oct 2019 11:12
URI: http://sro.sussex.ac.uk/id/eprint/85779

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