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针对全机低速颤振风洞试验中存在的模型刚体不稳定现象,建立颤振模型刚体运动学一般性方程。运用稳定性原理判别模型系统的稳定性类型,并求解出不稳定风速,分析了一些因素对模型稳定性的影响规律,给出了模型静、动不稳定性发生转换与物理特性之间的关系,同时可进行悬挂系统及配重体系的设计,以保证全机低速颤振风洞试验的顺利进行。
Aiming at the instability phenomenon of the model rigid body in the low-speed flutter wind tunnel test, a general equation of rigid body kinematics of the flutter model is established. By using the principle of stability, the type of stability of the model system is discerned and unsteady wind speed is solved. The influence of some factors on the stability of the model is analyzed. The relationship between the conversion of static and dynamic instability and the physical characteristics is given , At the same time can be suspended system and counterweight system design to ensure the smooth low-speed flutter wind tunnel test.