使用振型叠加法以及模态截断法分别求解物体振动位移（附详细说明报告）-Using the mode superposition method and the modal truncation method were used to solve the vibration displacement of the object (with detailed reporting)

主轴有限元分析临界转速及刚度、阻尼与模态振型。-Finite Element Analysis Critical spindle speed and stiffness, damping and mode shapes.

itd，一种时域模态参数识别方法，可以得到结构频率，阻尼比，振型，可直接使用，不需更改-A time domain modal parameter identification, can be measured data get the structure frequency and damping ratio and mode shapes