한국복합재료학회:학술대회논문집 (Proceedings of the Korean Society For Composite Materials Conference)
- 한국복합재료학회 2005년도 춘계학술발표대회 논문집
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- Pages.253-256
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- 2005
복합재 플랩 날개의 비선형 공력탄성학 해석
Nonlinear Aeroelastic Characteristics of Composite Wing with Flap
초록
Nonlinear aeroelastic analyses of composite wing with flap are performed considering free-play and dynamic stiffness of actuator. Doublet-Hybrid method is used for the calculation of subsonic unsteady aerodynamic forces. Free-play is modeled as an asymmetric bilinear spring and is linearized by using the describing function method. The linear and nonlinear flutter analyses show that the flutter characteristics are significantly dependent on the free-play and dynamic stiffness. From the nonlinear flutter analysis, various types of limit cycle oscillations are observed in a range of air speeds below or above the linear divergent flutter boundary.