The prime focus of this article is to compute the effect of atmospheric turbulence on the dynamic vibration frequency of an aircraft wing. Flutter is an unstable self – excited vibration in which the structure extracts energy from the outside airstream. It facilitates to build up the amplitude and often result in an unpredicted damage to structure can occur easily within few seconds. Aircraft wing structure is commonly flexible in nature and this flexibility of the airframe makes aeroelastic study as an important aspect of aircraft design. The displacement of wing against the oncoming flow field plays an important role in dynamic stability characteristics. To maintain the aircraft stability at high speeds, distance between the aerodynamic centre and the elastic axis of aircraft wing should be kept in minimum. An analytical procedure is developed based on Theodorsen method to forecast the speed and frequency at which the gust occurs. Scope of this article is to increase the dynamic stability of the aircraft at the impact of non-linear gust. The gust induced vibration is investigated by numerical simulation on a swept wing to eliminate or identify the flutter boundary.

Full text: IJEIR_947_Final.pdf