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Alternative method for identification of the dynamic properties of bolted joints

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Abstract

Bolted joints often have a significant effect on the dynamical behavior of assembled mechanical structures. An accurate model of an assembled structure depends on correctly determining and identifying the dynamic parameters of bolted joints. This paper presents an alternative method for identifying these dynamic parameters using structure’s natural frequency and damping. A novel experiment is designed with a test piece consisting of only bolted joints, with the governing equations of the test piece established using the analytical method. The relationships between the equivalent dynamic parameters of the bolted joints and the natural frequencies and damping ratios of the test piece are determined for both the normal and tangential directions. The parameter identification problem for bolted joints is thus transformed into a test of the natural frequency and the damping ratio of the test piece. In order to check the accuracy of the proposed identification method, the test piece and bolted joints are modeled using the finite element method (FEM) and the dynamic properties of the test piece are analyzed. The maximum error between the natural frequencies of the FEM result and the experimental values in the normal and tangential models are 4.73% and 0.34%, respectively. The result indicates that the proposed method is valid for the dynamic parameter identification of bolted joints.

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Authors and Affiliations

  1. College of Mechanical & Electrical Engineering, Beijing University of Technology, Beijing, 100124, China

    Tieneng Guo

  2. School of Mechanical and Electrical Engineering, Xi’an University of Architecture Technology, Xi’an, 710055, China

    Ling Li, Ligang Cai & Yongsheng Zhao

Authors
  1. Tieneng Guo
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  2. Ling Li
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  3. Ligang Cai
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  4. Yongsheng Zhao
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Corresponding author

Correspondence to Ling Li.

Additional information

Recommended by Editor Yeon June Kang

Ling Li is a lecturer in the College of Coustruction Machinery, Chang’an University. He graduated from Beijing University of Technology with a Ph.D in Mechanical Engineering. His research interests include machine dynamics, mechanical behavior of the bolted joints and interfaces of the critical structures, non-linear mechanics, and accuracy design of machine tool, etc.

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Guo, T., Li, L., Cai, L. et al. Alternative method for identification of the dynamic properties of bolted joints. J Mech Sci Technol 26, 3017–3027 (2012). https://doi.org/10.1007/s12206-012-0815-7

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  • DOI: https://doi.org/10.1007/s12206-012-0815-7

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