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    Substructural interface force identification with limited vibration measurements

    Access Status
    Fulltext not available
    Authors
    Li, Jun
    Hao, H.
    Date
    2016
    Type
    Journal Article
    
    Metadata
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    Citation
    Li, J. and Hao, H. 2016. Substructural interface force identification with limited vibration measurements. Journal of Civil Structural Health Monitoring. 6 (3): pp. 395-410.
    Source Title
    Journal of Civil Structural Health Monitoring
    DOI
    10.1007/s13349-016-0157-8
    ISSN
    2190-5452
    School
    Department of Civil Engineering
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/DE140101741
    URI
    http://hdl.handle.net/20.500.11937/38700
    Collection
    • Curtin Research Publications
    Abstract

    This paper presents a dynamic substructural interface force identification approach with limited vibration measurements from the target substructure. The substructure is considered to be subjected to both the external excitation forces at some specific degrees-of-freedom (DOFs) within the substructure and the interface forces at interface DOFs. The interface force time histories are represented as orthogonal polynomials and their discrete Fourier transform is expressed in the matrix multiplication form which transforms the time domain interface forces into their Fourier transforms in the frequency domain. A frequency-time domain method is used to formulate the identification equation based on the relationship between two sets of response vectors in a substructure. The coefficients of orthogonal functions are identified with the Tikhonov regularization technique. Numerical studies on a seven-storey plane frame structure are conducted to investigate the accuracy and efficiency of the proposed substructure interface force identification approach.

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