Nonlinear dynamics of fluttering multibay panels in supersonic regime

• Type: Article in International Conference Proceedings Book
• Date: 2019

Authors

F. D. Marques (Author) Other; António Mendes Ferreira (Author) FEUP

Conference proceedings International

Title: AIAA Scitech 2019 Forum

AIAA Scitech Forum, 2019

7 January 2019 through 11 January 2019

Indexing

Scopus - 0 Citations

Other information

Authenticus ID: P-00Q-VFV

DOI: 10.2514/6.2019-1867

Abstract (EN): This investigation consists of a numerical investigation on the nonlinear flutter oscillations of multibay panels on multiple supports in high supersonic flow. In contrast to what is done in the majority of studies, direct time-domain integration is used here instead of linearized updated mode approximations or modal decomposition techniques. The main goal is to study the interaction between adjacent bays in the nonlinear regime in order to identify aeroelastic phenomena that are not predicted by the usual single-panel approach. Isotropic panels in two-bay arrangements are considered. In nearly all simulated cases, severe jump discontinuities were detected in the limit cycle oscillation amplitudes when the dynamic pressure reaches certain values. Such jumps occur due to the nonlinear coupling between neighboring bays and consist of very abrupt amplitude elevations that happen when there are inversions in the motion phase of one or more bays. Moreover, this study was able to show that single-panel analysis may be unsafe for structural design as it drastically underestimates the displacements of the adjacent panels. © 2019 by Timothy K. Minton. Published by the American Institute of Aeronautics and Astronautics, Inc.

Language: English

Type (Professor's evaluation): Scientific