Aeroelastic analysis of composite wings with unbalance laminates

The aeroelastic analysis was performed on the high-aspect-ratio composite wings with unbalance laminates in upside and downside skins. Considering the effect of the variation of the unbalance laminates of skins on the aeroelastic performance, aeroelastic models were built for the high-aspect-ratio composite wings with different swept angles and unbalance laminates in the skins. The variations of the deformation and the lift performance in the case of heavy loads with the unbalance level of the skin laminates were analyzed for the wings, as well as the variation tendency of the vibration characteristics and the divergence/flutter speed. The results show that the unbalance level of the skin laminates has great effects on the divergence speed and static aeroelastic characteristics of the wings, but little effects on the natural frequencies and flutter speed.