A METHOD OF IDENTIFYING INTERFACE CHARACTERISTIC FOR MACHINE TOOLS DESIGN

In order to develop the technology of calculating static and dynamic behavior of a new product during its design period without prototype, an identification method for calculating interface characteristic of mechanical structure system is presented. The paper discusses an optimum algorithm, in which the contact stiffness coefficients are taken as design variables, aiming at minimizing the sum of squares of eigenfrequency differences between finite element modes and their corresponding experimental modes, based on mode shape identification. The corresponding software has been developed. Using the identified parameters from an interface sample composed of one base and two columns, the eigenfrequency of mechanical structure system has been calculated and their accuracy has been verified by testing.