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首先研究了热效应对壁板结构动力学特性的影响.将基于超音速活塞理论的非定常气动力模型与壁板的结构动力学方程相结合,得到了热壁板的颤振方程.利用p-k法进行了热壁板的颤振计算,讨论了气流偏角对颤振速度的影响.数值结果表明,热效应对壁板的固有特性有较大影响,进而影响壁板的颤振特性.
Firstly, the influence of thermal effect on the dynamic characteristics of the wall structure is studied. The unsteady aerodynamic model based on the supersonic piston theory is combined with the structural dynamic equation of the wall to obtain the flutter equation of the thermal wall. The pk method The flutter calculation of the hot wall is carried out and the influence of the airflow declination on the flutter speed is discussed.The numerical results show that the thermal effect has a significant influence on the inherent characteristics of the wall and thus affects the flutter characteristics of the wall.