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针对柔性自旋飞行器动力学问题,考虑结构自身旋转作用,建立计入陀螺力矩及随动推力影响的运动方程,研究系统的动力学响应问题。将柔性自旋飞行器简化为非均匀转子结构,采用剪切变形对轴向位移有影响的Timoshenko梁模型,计入了陀螺力矩及随动推力的影响,基于有限元方法建立了运动方程,分析了质量偏心力作用下转速和推力对系统动力响应的影响以及结构失稳的情况。分析结果表明:随动推力的增加会减小系统的刚度和临界转速;激振频率等于系统临界转速频率时系统发生共振;推力达到或超过临界推力将导致系统失稳;转速的增加会降低系统的临界推力值;结构的非均匀性对系统的临界转速和临界推力造成很大影响。
Aiming at the dynamics problem of flexible spin-aero vehicle, considering the rotation of the structure itself, the equations of motion that take into account the influence of gyroscopic moment and following thrust are established and the dynamic response of the system is studied. The simplified spinosy is simplified as a non-uniform rotor structure. The Timoshenko beam model, which has influence on the axial displacement due to shear deformation, is taken into account. The gyroscopic moment and the thrust force are taken into account. The equations of motion are established based on the finite element method. The Influence of Rotational Speed and Thrust on the Dynamic Response of the System and the Structural Instability under the Eccentric Force. The results show that the increase of follow-up thrust will reduce the stiffness and critical speed of the system. When the excitation frequency is equal to the critical speed of the system, the system will resonate. If the thrust reaches or exceeds the critical thrust, the system will not be stable. Of the critical thrust value; structural non-uniformity of the system critical speed and critical thrust caused a great impact.