Stability analysis of multiharmonic nonlinear vibrations for large models of gas-turbine engine structures with friction and gaps

Petrov, E P (2016) Stability analysis of multiharmonic nonlinear vibrations for large models of gas-turbine engine structures with friction and gaps. Journal of Engineering for Gas Turbines and Power, 139 (2). 022508. ISSN 0742-4795

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Abstract

An efficient method is proposed for the multiharmonic frequency domain analysis of the stability for nonlinear periodic forced vibrations in gas-turbine engine structures and turbomachines with friction, gaps and other types of nonlinear contact interfaces. The method allows using large-scale finite element models for structural components together with detailed description of nonlinear interactions at contact interfaces between these components. The highly accurate reduced models are applied in the assessment of stability of periodic regimes for large-scale model of gas-turbine structures. An approach is proposed for the highly-accurate calculation of motion of a structure after it is perturbed from the periodic nonlinear forced response.
Efficiency of the developed approach is demonstrated on a set of test cases including simple models and large-scale realistic bladed disc models with different types of nonlinearities: friction, gaps and cubic nonlinear springs.

Item Type: Article
Keywords: Stability, Nonlinear vibration, Frequency response, Multiharmonic balance
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Subjects: T Technology > TJ Mechanical engineering and machinery
T Technology > TJ Mechanical engineering and machinery > TJ0170 Mechanics applied to machinery. Dynamics
Depositing User: Yevgen Petrov
Date Deposited: 29 Jul 2016 08:24
Last Modified: 13 Mar 2017 11:08
URI: http://sro.sussex.ac.uk/id/eprint/62138

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