In order to have a better damping effect, the design parameters of the built-in damping boring bar should be optimized in the design stage. It is generally believed that the establishment of its simplified kinetic model for frequency domain analysis was a simple method. However, the traditional method that was described in S.A Tobias’s book applied only to the constant frequency. In order to overcome this problem, the global optimization search numerical method was used to solve several parameters,which made the damping boring bar has the minimal value of the relative vibration amplitude when the exciting frequency of vibration was in a wide range of changes. In order to obtain the conclusive optimal parameters, the parameters were amended by the frequency response curve with the smallest area method. The optimized damping boring bar and the same size solid boring bar’s BODE chart were drawn. The charts showed that the amplitude of the optimized damping boring bar of which are significantly smaller than the solid damping boting bar’s.
