Continuum Aeroelastic Model and Flutter Analysis for a Variable-Span Morphing Wing

Abstract:

A linear aeroelastic continuum model for a variable-span wing is developed. Considering the fixed inboard part and the movable outboard part of the wing, a stepped Euler-Bernoulli beam with three jumped discontinuities in its spatial span is used for structural modeling. The dynamic analysis of stepped beam is introduced by a dimensionless form. The time-domain aerodynamic forces are calculated by a reduced-order unsteady vortex lattice model. Then the first-order state-space aeroelastic formulations are built by using the Galerkin method. The impact of the different wing configurations is of particular interest for understanding the fundamental aeroelastic behavior of variable-span wing. To clarify the implementation of the proposed method, a simple variable-span wing with the basic parameters of the Goland wing is studied, and numerical simulations are provided to demonstrate the flutter speeds and frequencies for different wing configurations.

• Periodical: Applied Mechanics and Materials (Volumes 300-301)
• Pages: 1136-1143
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.300-301.1136
• Online since: February 2013
• Authors: Ren Huang, Zhi Ping Qiu, Xiao Jun Wang
• Keywords: Flutter, Morphing Aircraft, Stepped Beam, Unsteady Vortex Lattice, Variable-Span Wing

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