• CN：11-2187/TH
• ISSN：0577-6686

›› 2013, Vol. 49 ›› Issue (7): 168-175.

• 论文 •

### 栓接结合部动态特性辨识方法

1. 西安建筑科技大学机电工程学院;北京工业大学机械工程与应用电子技术学院
• 发布日期:2013-04-05

### Identification Method for Dynamic Properties of Bolted Joints

LI Ling;CAI Anjiang;CAI Ligang;GUO Tieneng;RUAN Xiaoguang

1. School of Mechanical and Electrical Engineering, Xi’an University of Architecture Technology College of Mechanical & Electrical Engineering, Beijing University of Technology
• Published:2013-04-05

Abstract: The ill-posed problem is produced by its non-linear property of bolted joints, noise effect and numerical error at using the frequency response functions (FRFs) to identify parameters of bolted joints. In order to avoid the ill-posed problem, the normal and tangential dynamic model of bolted joints is established by sub-structure synthesized method, and using weighted function method to make the coefficients of each identification equations maintaining at the same level. Then using the FRFs method to identify parameters of bolted joints, respectivity, the identification results are regarded as the initial numerical values and calculated the sensitivity by iterative method in the whole frequency range. In the end, the experimental data is selected by sensitivity method and then to identify the parameters of bolted joints. From the results of experiment and verification, results show that the proposed method can significantly improve the accuracy of identification, and the sensitivity method can be used to avoid the ill-conditioned problem.