As the desire for more flexible aircraft structures increases, so does the need to incorporate the intrinsic nonlinearities in their aeroelastic analyses. In that manner, it becomes essential to fully characterize the aeroelastic behavior and to investigate the effects that common external disturbances, such as atmospheric gust turbulence, might induce. In this work, an augmentation of the semi-empirical Beddoes–Leishman dynamic stall model to include gust loads is presented. This augmented dynamic stall model is coupled with the typical section equations of motion to yield a complete aeroelastic framework for gust-induced stall flutter analyses. The stability boundary of a classic 2-DOF typical section is investigated, and a stochastic gust response study reveals that depending on the turbulence intensity, the probabilities of reaching aeroelastic instability can be quite high even for airspeeds well below the one for linear flutter.

随着对更灵活的飞机结构的需求的增加，将固有非线性纳入其气动弹性分析的需求也在增加。这样，充分表征气动弹性行为并研究常见的外部干扰（例如大气阵风湍流）可能引起的影响就变得至关重要。在这项工作中，提出了半经验的Beddoes-Leishman动态失速模型的扩充，其中包括阵风载荷。这种增强的动态失速模型与典型的运动截面方程相结合，可以为阵风引起的失速颤振分析提供完整的气动弹性框架。研究了典型2自由度典型截面的稳定性边界，并且通过随机阵风响应研究表明，取决于湍流强度，