Nonlinear finite element aeroelastic modelling of reinforced aircraft skin panels

• Grant number: 17/26284-6
• Support Opportunities: Scholarships in Brazil - Master
• Start date: April 01, 2018
• End date: August 31, 2018
• Field of knowledge: Engineering - Aerospace Engineering - Aerospace Structures
• Agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
• Principal Investigator: Flávio Donizeti Marques
• Grantee: Douglas Ramalho Queiroz Pacheco
• Host Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil

Abstract

Panel flutter is an aeroelastic phenomenon that can cause critical structural failure in aerospace vehicles operating at supersonic speeds. A reliable modelling of such phenomenon is crucial for safely predicting the fatigue life of aerospace skin, thus being of great importance to structural design. Moreover, aircraft panels are typically composed of large plates which are internally reinforced by stringers, longerons and/or frames. The use of such stiffening elements ends up subdividing the panel into multiple cells which can interact during flutter, thereby potentially making the aeroelastic motion more complex and dangerous. In this context, the present work proposes the study and implementation of a computational finite element model for the study of nonlinear flutter in stiffened panels. The coupling of the Mindlin plate model and the Timoshenko beam model, both in geometrically nonlinear regime, is proposed. The model and the analyses will tackle both isotropic and laminated panels. The aerodynamic load will be computed through first-order piston theory, which provides good results for high-supersonic flows. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

PACHECO, DOUGLAS R. Q.; MARQUES, FLAVIO D.; FERREIRA, ANTONIO J. M.. Panel flutter suppression with nonlinear energy sinks: Numerical modeling and analysis. INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS, v. 106, p. 108-114, NOV 2018. (17/26284-6)

GUIMARAES, THIAGO A. M.; SANCHES, LEONARDO; MARQUES, FLAVIO D.. Nonlinear supersonic post-flutter motion of panels with adjacent bays and thermal effects. INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS, v. 125, OCT 2020. (17/26284-6, 17/02926-9)

PACHECO, DOUGLAS R. Q.; MARQUES, FLAVIO D.; FERREIRA, ANTONIO J. M.. Finite element analysis of fluttering plates reinforced by flexible beams: An energy-based approach. Journal of Sound and Vibration, v. 435, p. 135-148, NOV 24 2018. (17/26284-6)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

PACHECO, Douglas Ramalho Queiroz. Nonlinear finite element aeroelastic modelling of reinforced skin panels in supersonic flows. 2018. Master's Dissertation - Universidade de São Paulo (USP). Escola de Engenharia de São Carlos (EESC/SBD) São Carlos.