In this paper, a synchronous vibration control method was proposed to avoid the high-cycle fatigue fracture of aeroengine rotor blade. Firstly. The harmonic force, causing synchronous vibration, was derived by Fourier series expansion by the mean of simplifying the aerodynamic exciting forces into the periodic rectangular pulse wave forces. It was found that the synchronous vibration can be controlled by adjusting the primary excitation forces parameters. Based on this, the additional secondary excitation forces were introduced to control the synchronous vibration caused by primary excitation forces. Secondly, the influences of the number, position, direction, duration of additional secondary excitation forces and the phase difference between additional secondary excitation forces and primary excitation forces on the synchronous vibration control were obtained through theoretical analysis, which was simulated and verified by a single-degree-of-freedom model. Thirdly, a high-speed straight blade test bench was established, and the feasibility of the method in controlling synchronous vibration of rotor blade was proved by adding additional magnet excitation forces on the basis of fixed magnet excitation forces. Finally, the suppression strategy of synchronous vibration of rotor blade by introducing additional secondary excitation forces was given. It can provide theoretical and technical support for effectively controlling the synchronous vibration amplitude and avoiding the high-cycle fatigue fracture of rotor blade in engineering practice.

为了避免航空发动机转子叶片的高周疲劳断裂，提出了一种同步振动控制方法。首先。傅里叶级数展开是通过将空气动力激发力简化为周期性矩形脉冲波力而产生的，引起同步振动的谐波力。发现可以通过调节初级激振力参数来控制同步振动。在此基础上，引入了附加的二次激振力来控制由一次激振力引起的同步振动。其次，数量，位置，方向的影响，通过理论分析，获得了附加二次激励力的持续时间以及同步振动控制上附加二次激励力与一次激励力之间的相位差，并通过单自由度模型对其进行了仿真和验证。第三，建立了高速直叶片试验台，通过在固定的磁体激励力的基础上增加附加的磁体激励力，证明了该方法控制转子叶片同步振动的可行性。最后，通过引入额外的二次激励力，给出了转子叶片同步振动的抑制策略。