【摘要】 首先,该文基于颤振研究的频率重合理论,对两组悬臂壳体结构进行了弯扭耦合模态的颤振规律研究,提出一种简便的颤振频率预估方法,并进行了两组模型校检。第一组模型控制均质梯形薄板掠角作为单一变量,对颤振模态与耦合模态进行了规律性研究,并对颤振频率计算方法进行试算,为带掠角的梯形翼颤振参数初选提供了参考。第二组模型以单向铺层结构的矩形悬臂薄板的铺层角度作为基本变量,给出颤振方向性对颤振参数的影响规律,同时也检验了复合材料薄板的颤振频率预算结果,为复合材料机翼设计提供相应参考依据。更多还原

【Abstract】 Based on the frequency superposition theory calculation method, a forecast method of flutter frequency is established and verified by the following two models: 1) The first group of models are a homogeneous trapezoidal plate with a sweep angle as a single variable. A chatter frequency calculation method is proposed, the correlation between flutter modes and bending-torsional coupling modes under different sweep angles is discussed, and the results’ accuracy is identified. 2) The second group models are a rectangular cantilever plate with a single layer orientation as a single variable, the flutter parameters regularity is developed, and the chatter frequency of a composite sheet is examined. This method provides a reference for the composite wing design and internal mechanism of chatter problems.更多还原