(1)用当地活塞流理论可计算小展弦比有限厚度三角舵面非定常气动力,飞行参数确定后,在模态坐标下求解系统动力学方程特征根即可求得颤振临界动压和临界频率;
(2)舵偏角度和加载工况一定时,颤振临界动压随马赫数增大而增大,颤振临界频率随马赫数增大而减小;舵偏角度一定时,有载工况颤振临界边界高于无载工况;舵偏对颤振临界边界的影响随舵偏角度增大而增大;
(3)有舵偏无载工况颤振临界边界最低,是最易发生颤振的工况,保守考虑将此边界定为舵面颤振临界边界,低于该边界的区域为安全区,飞行参数在安全区内则不会发生颤振;
(4)舵面结构设计时应充分考虑颤振的影响,确保结构设计的安全性和合理性,为型号研制和飞行试验的成功提供保障.
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