The dynamic aeroelastic instability of flutter is an important factor in the design of modern high-speed, flexible aircraft. The current trend is toward the creative use of composites to delay flutter. To obtain an optimum design, we need an accurate as well as efficient model. As a first step towards this goal, flutter analysis is carried out for an unswept composite box beam using a linear structural model and Theodorsen's unsteady aerodynamic theory. Structurally, the wing was modeled as a thin-walled box-beam of rectangular cross section. Theodorsen's theory was used to get 2-D unsteady aerodynamic forces, which were integrated over the span. A free-vibration analysis is carried out. These fundamental modes are used to get the flutter solution using the V-g method. Future work is intended to build on this foundation.
Flutter Analysis of Composite Box BEAMS
1995
14 pages
Report
No indication
English
Aerodynamics , Aircraft , Structural Mechanics , Aeroelasticity , Box beams , Dynamic models , Dynamic structural analysis , Flexible wings , Flutter , Flutter analysis , Theodorsen transformation , Unsteady aerodynamics , Aerodynamic forces , Angle of attack , Equations of motion , Free vibration , Kinetic energy , Lagrangian function , Thin walls , Two dimensional models , Viscous damping
Flutter analysis of composite box beams
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