Application of bolt joints dynamic parameters identification in machine tools based on partially measured frequency response functions

作者：Deng Congying; Heng Liang^*; Yin Qin; Lin Lijun; Yin Guofu

来源：Journal of Vibroengineering, 2015, 17(3): 1090-1104.

• bolt joints identification
• partially measured frequency response functions
• machine tools
• substructuring method

This paper presents a method to identify the bolt joints dynamic parameters based on partially measured frequency response functions (FRFs) and demonstrates its application in machine tools. Basic formulas are derived to identify the joint dynamic properties based on the substructuring method and an algorithm to estimate the unmeasured FRFs is also developed. The identification avoids direct inverse calculation to the frequency response function matrix, and its validity is demonstrated by comparing the simulated and measured FRFs of the assembled free-free steel beams with a bolt joint. An approach is put forward to apply the identification in machine tools by constructing structures assembled of substructures and joint structures to substitute the bolt joints in machine tools and assuring the contact conditions unchanged. The identification of the bed-column bolt joint in a vertical machining center is provided to describe the application procedure and show the feasibility of the proposed approach.

• 出版日期2015-5
• 单位四川大学