Journal
COMPUTERS & STRUCTURES
Volume 203, Issue -, Pages 18-33Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.compstruc.2018.05.005
Keywords
Reduced-order model; Nonlinear mode; Characteristic constraint mode; Interface mode; Component mode synthesis; Mistuned bladed disk
Funding
- Safran Helicopter Engines
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This paper introduces a novel reduced-order modelling technique well-suited to the study of nonlinear vibrations in large finite element models. The method combines the concepts of nonlinear complex modes and characteristic constraint modes - or interface modes - to build a fully algebraic reduced-order model easily solved by standard iterative solvers. The performance of the method is appraised on a nonlinear finite element model of bladed disk in the presence of structural mistuning, highlighting the potential of this new technique to deal with current industrial problematics. (C) 2018 Elsevier Ltd. All rights reserved.
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