本文从复模态理论出发,探讨了在机床模态分析中,应用脉冲激振法激励机床时的一些问题。监用此法对 C336K-1回轮式六角车床进行激励和模态分析。通过付里叶分析系统的模态动态显示(可见录象),形象地演示了机床13阶整机的振动模态和主轴箱、六角头、床身和拖板等4个主要零件的分离振动模态。并清楚地反映了机床在结构上存在的问题。 Based on the theory of complex modality, this paper discusses some problems in the modal analysis of machine tools and the use of the pulsed excitation method to stimulate the machine tool. This method was used to monitor the excitation and modal analysis of the C336K-1 turret type hexagonal lathe. Through the modal dynamic display of the Fourier analysis system (visible video), the vibration modes of the machine’s 13th-order machine, and the separation vibrations of the four main parts such as the headstock, hexagonal head, bed, and carriage are visually demonstrated. Modality. And clearly reflects the problems in the structure of the machine tool.