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针对现代翼吊式机翼发动机系统的特点,考虑发动机陀螺效应对系统结构动力学特性的影响,建立了基于梁振动理论的机翼弯扭颤振方程;分析了陀螺效应对系统颤振特性的影响规律。结果表明:不考虑发动机吊挂刚度影响时,陀螺效应不影响系统弯扭颤振发生机理,系统颤振速度和颤振频率随着发动机转速的提高而增大;转子陀螺效应对机翼弯扭颤振特性的影响可等效为系统阻尼,且该等效阻尼亦随着发动机转速的提高而增大。
Aiming at the characteristics of the modern wing-mounted wing engine system, considering the effect of the engine gyroscopic effect on the dynamic characteristics of the system structure, the wing bending and torsional flutter equation based on the beam vibration theory is established. The gyroscopic effect on the flutter characteristics of the system Affect the law. The results show that the gyroscopic effect does not affect the mechanism of the system bending-torsional flutter, and the flutter frequency and flutter frequency of the system increase with the increase of the engine rotational speed without considering the influence of the stiffness of the engine suspension. The rotor gyroscopic effect The effect of flutter characteristics is equivalent to the damping of the system, and the equivalent damping also increases as the engine speed increases.