Flutter Analysis on Composite Rudder of Air-to-Air Missile

The flutter analysis model of composite rudder is established, and the flutter velocity at ambient temperature is calculated, the influence of the layup scheme on the flutter characteristics of the composite rudder is studied. The results show that the flutter velocity of the composite rudder is 575.8 m/s at sea level, and flutter coupling form of the composite rudder is a typical bending and torsional modal coupling. The flutter velocity of composite rudder increases with the flight height, and it is related to the frequency difference between the first-order modal and the second-order modal. When the frequency difference between the first-order modal and the second-order modal increases, the flutter velocity of the composite rudder increases correspondingly. The frequency difference between the first-order modal and the second-order modal is increased by adjusting the layup angle, layup proportion and layup sequence, thereby the flutter velocity of the composite rudder can be increased.