Nonlinear Approximate Aeroelastic Analysis of Flapping Wings in Hover andForward Flight.

[摘要] The development of a nonlinear approximate aeroelastic model suitable for representingthe behavior of flexible anisotropic flapping wings in hover and forward flight is described.The structural dynamic component of the flapping wing aeroelastic problem is modeled usingMSC MARC, a commercially available nonlinear finite element package, and the aerodynamicloads are computed from an approximate aerodynamic model that incorporates leading edgevortices and a wake model. The aerodynamic formulation, originally developed for rigid wingsin hover, is modified to account for wing flexibility, viscosity, and free stream due to forward flight.The results contain validation studies conducted in MARC, aerodynamic studies usingrigid airfoils and wings in hover and forward flight, and aeroelastic studies on isotropic andanisotropic Zimmerman wings in hover and forward flight. The structural dynamic studiesdemonstrate the capabilities of the MARC code to model anisotropic bio-inspired flappingwings. For the rigid cases considered, the approximate aerodynamic model shows reasonableagreement with CFD-based results and predicts accurate trends. Results indicate that theforces generated by rigid wings are insensitive to Reynolds number (626

[发布机构] University of Michigan

[效力级别] Aerospace Engineering

[关键词] Nonlinear Approximate Aeroelasticity of Bio-inspired Anisotropic Flapping Wings in Hover and Forward Flight;Aerospace Engineering;Engineering;Aerospace Engineering