scholarly journals NEW THEORETICAL FLOQUET MODAL ANALYSIS TO STUDY 3-D FINITE ALMOST PERIODIC STRUCTURES WITH COUPLED CELLS

2021 ◽  
Vol 95 ◽  
pp. 163-169
Author(s):  
Bilel Hamdi ◽  
Taoufik Aguili
Keyword(s):  
Modal Analysis ◽  
Periodic Structures ◽  
Almost Periodic ◽  
Coupled Cells

Nonlinear Modal Analysis and Energy Localization in a Bladed Disk Assembly

2008 ◽  
Author(s):  
F. Georgiades ◽  
M. Peeters ◽  
G. Kerschen ◽  
J. C. Golinval ◽  
M. Ruzzene
Keyword(s):  
Modal Analysis ◽  
Nonlinear Oscillations ◽  
Periodic Structures ◽  
Normal Modes ◽  
Nonlinear Normal Modes ◽  
Energy Localization ◽  
Bladed Disk ◽  
Bladed Disk Assembly ◽  
Nonlinear Modal Analysis ◽  
Nonlinear Normal

The objective of this study is to carry out modal analysis of nonlinear periodic structures using nonlinear normal modes (NNMs). The NNMs are computed numerically with a method developed in [18] that is using a combination of two techniques: a shooting procedure and a method for the continuation of periodic motion. The proposed methodology is applied to a simplified model of a perfectly cyclic bladed disk assembly with 30 sectors. The analysis shows that the considered model structure features NNMs characterized by strong energy localization in a few sectors. This feature has no linear counterpart, and its occurrence is associated with the frequency-energy dependence of nonlinear oscillations.

Response of periodic structures by modal analysis

1978 ◽  
Vol 56 (4) ◽  
pp. 481-493 ◽  
Author(s):  
R.C. Engels ◽  
L. Meirovitch
Keyword(s):  
Modal Analysis ◽  
Periodic Structures
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