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    Structural damage identification with extracted impulse response functions and optimal sensor locations

    Access Status
    Fulltext not available
    Authors
    Li, Jun
    Hao, Hong
    Fan, X.
    Date
    2015
    Type
    Journal Article
    
    Metadata
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    Citation
    Li, J. and Hao, H. and Fan, X. 2015. Structural damage identification with extracted impulse response functions and optimal sensor locations. Electronic Journal of Structural Engineering. 14 (1): pp. 123-132.
    Source Title
    Electronic Journal of Structural Engineering
    Additional URLs
    http://www.ejse.org/Archives/Fulltext/2015-1/2015-1-12.pdf
    ISSN
    1443-9255
    URI
    http://hdl.handle.net/20.500.11937/31571
    Collection
    • Curtin Research Publications
    Abstract

    This paper presents a structural damage identification approach based on the time domain impulse response functions, which are extracted from the measured dynamic responses with the input available. The theoretical sensitivity of the impulse response function with respect to the system stiffness parameters considering the damping model is derived. The first-order sensitivity based model updating technique is performed for the iterative model updating. The initial structural finite element model and acceleration measurements from the damaged structure are required. Local damage is identified as a reduction in the elemental stiffness factors. The impulse response function sensitivity based optimal sensor placement strategy is employed to investigate the best sensor locations for identification. Numerical studies on a beam model are conducted to validate the proposed approach for the extraction of time domain impulse response functions and subsequent damage identification. The simulated damage can be identified effectively and accurately.

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