In this work, a methodology for incorporating measured modal data into an existing refined finite element model is examined with the objective of detecting and locating structural damage. The algorithm is based on the partial inverse problem, in that only partial spectral information is required. The technique utilizes a symmetric eigenstructure assignment algorithm to perform the partial spectral assignment. Algorithms to enhance mode shape assignability and to preserve sparsity in the damaged FEM are developed. The sparsity preservation is of particular importance when considering damage detection in trusslike structures. Several examples are presented to highlight the key points made within the paper.


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    Title :

    Eigenstructure assignment approach for structural damage detection


    Contributors:

    Published in:

    AIAA Journal ; 30 , 7, Ju


    Publication date :

    1992-07-01



    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English