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Various Structural Approaches to Analyze an Aircraft with High Aspect Ratio Wings
Anas El Arras(엘 아라스),Chan Hoon Chung(정찬훈),Young-Ho Na(나영호),SangJoon Shin(신상준) 한국항공우주학회 2011 한국항공우주학회 학술발표회 논문집 Vol.2011 No.11
This paper presents an aeroelastic analysis of an air vehicle with high aspect ratio wings. The first approach emphasizes on the nonlinear behaviors of the wings and the unsteady subsonic aerodynamic forces acting on it. Besides, the second approach uses a one dimensional, Euler-Bernoulli, linear beam. The structural analysis results obtained from both beam models are validated with the 3-D NASTRAN finite elements model. The present model considers two control surfaces and has a taper ratio of 0.5, 21 ribs, and 3 spars. The structural mode shapes and natural frequencies are applied for both the linear and non-linear beams, and then the aerodynamic force is obtained and is compared with the unsteady aerodynamic force that comes from the 3-D model. The forces are obtained using ZAERO and then used to perform the flutter analysis.