4.7 Article

Local nonlinear stores induce global modal interactions in the steady-state dynamics of a model airplane

Journal

JOURNAL OF SOUND AND VIBRATION
Volume 500, Issue -, Pages -

Publisher

ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jsv.2021.116020

Keywords

Nonlinear modal interactions; Proper orthogonal decomposition; Model airplane; Global effects

Funding

  1. Faculty Development Scholarship, Engineering Research and Development for Technology Program, Department of Science and Technology, Government of the Philippines (PH-DOST)
  2. Department of Mechanical Science and Engineering, University of Illinois at Urbana -Champaign

Ask authors/readers for more resources

Nonlinear modal interactions in a model airplane subject to harmonic excitation were studied, showing the influence of local nonlinear attachments on the global dynamics. The findings indicate that nonlinearities can facilitate energy transfer to non-resonant airplane modes in certain frequency bands.
Local nonlinear attachments can affect the global dynamics of their linear host structures through modal interactions. This was shown previously in experimental and computational studies of a model airplane with local nonlinear attachments at its wings, under impulsive forcing. Here we study nonlinear modal interactions in the model airplane subject to harmonic excitation. We consider the case of both attachments locked (L-L - baseline linear system), and compare it to two nonlinear cases, i.e., left-wing attachment unlocked (U-L), and both attachments unlocked (U-U). Nonlinear output response functions are used to study the nonlinear modal interactions due to the local attachments in the frequency domain; these are detected only in a certain frequency band. Proper orthogonal decomposition, in conjunction with a weighted modal assurance criterion, are used to quantify these modal interactions. At some frequency bands the nonlinearities facilitate energy transfer to non-resonant airplane modes, despite being widely separated in frequency from resonant modes. Our findings apply to general linear systems with local nonlinear attachments. (c) 2021 Elsevier Ltd. All rights reserved.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available