Nonlinear flutter analysis of composite panels

• Published in: Modern physics letters. B, Condensed matter physics, statistical physics, applied physics Vol. 32; no. 12n13; p. 1840043
• Main Authors: An, Xiaomin, Wang, Yan
• Format: Journal Article
• Language: English
• Published: Singapore World Scientific Publishing Company 10.05.2018; World Scientific Publishing Co. Pte., Ltd
• Subjects: Aeroelasticity; Applications of Fluid Mechanics; Computation; Curved panels; Dynamic pressure; Finite element method; Flutter analysis; Geometric nonlinearity; Nonlinear analysis; Nonlinear programming; Panel flutter; Supersonic aircraft; Supersonic flow; Time marching; Vibration; limit cycle oscillations; Fluid–structure interaction; nonlinear panel flutter
• ISSN: 0217-9849; 1793-6640
• DOI: 10.1142/S0217984918400432

Nonlinear panel flutter is an interesting subject of fluid–structure interaction. In this paper, nonlinear flutter characteristics of curved composite panels are studied in very low supersonic flow. The composite panel with geometric nonlinearity is modeled by a nonlinear finite element method; and the responses are computed by the nonlinear Newmark algorithm. An unsteady aerodynamic solver, which contains a flux splitting scheme and dual time marching technology, is employed in calculating the unsteady pressure of the motion of the panel. Based on a half-step staggered coupled solution, the aeroelastic responses of two composite panels with different radius of R = 5 and R = 2.5 are computed and compared with each other at different dynamic pressure for Ma = 1.05. The nonlinear flutter characteristics comprising limited cycle oscillations and chaos are analyzed and discussed.