气动加热下高速尾翼的热颤振分析

运用MSC.Nastran软件对高速飞行器尾翼在不同温度下的模态进行分析,并采用p-k法对尾翼进行了颤振分析.结果显示,气动加热使得结构的固有频率不断降低,并最终降低飞行器的颤振速度,从而影响飞行器的稳定性.而对于温度分布均匀的结构,主要是材料性能的降低使得颤振速度下降.

Analysis of Tail Thermal Flutter under Aerodynamic Heating

First,analysis the modes of hypersonic tail at different temperature by using MSC.Nastran.Then,analysis the flutter of the tail solved with p-k method.The research results show that increased temperature will decrease the natural frequency of the tail,and decrease the flutter velocity.In the uniform temperature,the flutter velocity decrease by the material properties of the structure.