[1] Liu Xin, Sun Beibei, Li Lie, Chen Jiandong, et al. Nonlinear identification and characterizationof structural joints based on vibration transmissibility [J]. Journal of Southeast University (English Edition), 2018, 34 (1): 36-42. [doi:10.3969/j.issn.1003-7985.2018.01.006]

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Nonlinear identification and characterizationof structural joints based on vibration transmissibility()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

34

Issue:

2018 1

Page:

36-42

Research Field:

Mechanical Engineering

Publishing date:

2018-03-20

Info

Title:

Nonlinear identification and characterizationof structural joints based on vibration transmissibility

Author(s):

Liu Xin;  Sun Beibei;  Li Lie;  Chen Jiandong;  Xue Fei

School of Mechanical Engineering, Southeast University, Nanjing 211189, China

Keywords:

structural joint;  vibration transmissibility;  nonlinear identification;  harmonic balance method

PACS:

TH113.1

DOI:

10.3969/j.issn.1003-7985.2018.01.006

Abstract:

In order to investigate the nonlinear characteristics of structural joint, the experimental setup with a jointed mass system is established for dynamic characterization analysis and vibration prediction, and a corresponding nonlinearity identification method is studied. First, the sine-sweep vibration test with different base excitation levels are applied to the structural joint system to study the dominant modal of mass rigid motion. Then, based on the harmonic balance method principle, the measured vibration transmissibilities are utilized for nonlinearity identification using different excitation levels. Experimental results show that nonlinear spring and damping force can be represented by a polynomial order approximation. The identified nonlinear stiffness and damping force can predict the system’s response, and they can reveal the shifts of resonant frequency or damping due to discontinuity of contact mechanisms within a certain range.

References:

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Memo

Memo:

Biographies: Liu Xin(1987—), male, Ph.D.candidate; Sun Beibei(corresponding author), female, doctor, professor, bbsun@seu.edu.cn.
Foundation items: The Major National Science and Technology Project(No.2012ZX04002032, 2013ZX04012032), Graduate Scientific Research Innovation Project of Jiangsu Province(No.KYLX_-0096).
Citation: Liu Xin, Sun Beibei, Li Lie, et al.Nonlinear identification and characterization of structural joints based on vibration transmissibility[J].Journal of Southeast University(English Edition), 2018, 34(1):36-42.DOI:10.3969/j.issn.1003-7985.2018.01.006.

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