A Merged Binding Modeling Method for Contact Fields of Bolted Joints

被引：0
|
作者：
Cui F. [1 ]
Hua D. [1 ]
Li Y. [1 ]
Kong L. [1 ]
Li P. [1 ]
机构：
[1] School of Mechanical and Precision Instrument Engineering, Xi'an University of Technology, Xi'an
来源：
Li, Yan (jyxy-ly@xaut.edu.cn) | 1912年 / Chinese Mechanical Engineering Society卷 / 29期
关键词：
Bolted joint; identification; Merged binding; Modal analysis; Parameter;
D O I：
10.3969/j.issn.1004-132X.2018.16.004
中图分类号：
学科分类号：
摘要：
A merged binding modeling method for contact areas of bolted joints was presented in order to improve the accuracy of on-line dynamic monitoring and real-time updating of large-scale complex structures' models.During the modeling processes,the contact field elements were constructed by separating a part of elements from the two mating substructures at each side of the interfaces.The elements in the contact regions would meet the isotropic conditions after a equivalent treatment, and a merged binding contact relationship was established among the elements.The greatest advantage of this modeling method is timesaving because it may effectively avoid increasing the numbers of degrees of freedom in the joint model.Moreover,this method is more universal with advantages of convenience in parameter identification.In the interest of the consistent accuracy between the calculation model and the physical model,the effects of additional masses of bolts,nuts and sensors on modeling accuracy were taken into account together with an optimization and identification of physical characterization parameters of bolted joints based on multi-objective genetic algorithm.The results show that the first six order theoretical mode shapes are in excellent coherence with their experimental counterparts,and the absolute values of the relative errors of corresponding natural frequency are less than 10%, which shows the proposed modeling method may effectively solve the dynamic modeling problems of joints in engineering practices. © 2018, China Mechanical Engineering Magazine Office. All right reserved.
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页码：1912 / 1920
页数：8
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