The dynamic characteristic analysis of spindle based on ANSYS

The basic concept of dynamic characteristics of spindle is introduced. The first ten order vibration mode and natural frequency of shaft are obtained by modal analysis and harmonic response analysis using software ANSYS. The deformation trend of spindle under resonance state is analysed and the contrast between theory and simulation critical speed is done. The frequency response curve of spindle is given. The first order, second order dynamic stiffness and dynamic stiffness under general conditions are calculated. The influence of bearing damping to spindle dynamics characteristics is discussed. In the end, the measures of improving spindle performance are summarized.