研究了变速切削系统的振动响应特征，理论分析和实验结果均表明，在发生再生型颤振时，变速切削系统的振动响应和动态切削力的频率随时间的变化规律和机床主轴转速随时间的变化规律相同；动态切削力为一宽频的激励信号，振动响应为一窄带的响应信号；动态切削力和振动响应的包络变动周期与机床主轴的变动周期相同 The vibration response characteristics of variable speed cutting system are studied. The theoretical analysis and experimental results show that the variation of vibration response and dynamic cutting force frequency of variable speed cutting system with time and the spindle speed of machine tool over time The dynamic cutting force is a wide-band excitation signal, the vibration response is a narrow-band response signal, and the envelope change cycle of dynamic cutting force and vibration response is the same as that of the spindle of the machine tool