T尾不同支持刚度的颤振分析研究

建立了T尾有限元模型,以及T尾带后机身等不同支持情况的动力学模型,并分别分析了它们的固有频率特性。为了简化计算规模,只进行一般地定性研究,忽略了T尾平尾有攻角、安装角或上反角引起的附加的广义气动力的影响,用偶极子网格法计算了临界颤振速度,并分析了不同的颤振特性。最后,得出后机身的不同支持刚度对T尾的临界颤振速度影响的趋势曲线。本次计算结果为以后的T尾的颤振分析打下了基础,为后机身的刚度分配提供了宝贵的数据支持。

Flutter Analysis of T-tail According to the Different Supporting Stiffness

FEM of T-tail is built up in this paper,and T-tail with the aft fuselage and the other models are also established in the present work.The natural frequency characteristics of all the models are analyzed respectively.In this present study,the simulative models are simply treated,and qualitative investigation and analysis,generalization are presented.The critical flutter speeds of T-tail are attained by DOUBLE_lattice method,while the influence of the additional generalized aerodynamic forces is ignored,due ...