The reason for the vibration of rotating machinery is that the rotor has an unbalance, of which the vibration caused by unbalance accounts for 24% of all vibrations. For high-speed rotating machinery, the vibration caused by unbalance is more significant. Therefore, it is necessary to conduct dynamic balance inspection on the rotating components of various rotating machinery, and the quality of the inspection directly affects the accuracy and service life of the machinery.

To perform dynamic balancing on rotating components, a dynamic balancing machine is necessary, and the swing frame of the dynamic balancing machine is closely related to its detection accuracy. The dynamic characteristics of the swing frame of the dynamic balancing machine directly affect its working performance. The dynamic stiffness characteristics of the dynamic balancing machine swing frame directly affect the natural frequency of the dynamic balancing machine swing frame. Therefore, it is necessary to conduct dynamic stiffness analysis on the swing frame of the dynamic balancing machine, identify the weak links on it, provide a basis for the optimization design of the swing frame of the dynamic balancing machine, and ensure the smooth progress of the dynamic balancing experiment of the rotor.