Base excitation analysis is widely used to predict the dynamic behavior of the structure, such as a spacecraft, and these results are generally verified by the dynamic testing. The standard correlation criteria, such as the modal assurance criterion and normalized cross-orthogonality check, are found to be insufficient for assuring the quality of the finite element model of the structure under base excitation. Here, to overcome these difficulties, the recently introduced base force assurance criterion is used to assess the correlation between the analytical and the experimental dynamic characteristics. The procedure is demonstrated using the experiment performed on a cantilever and two real spacecraft structures. The force transmitted to the base during the base excitation test and those calculated using the Craig–Bampton method are used to determine the base force assurance criterion for all three structures in different directions of excitation. It is demonstrated that the criterion can reasonably well predict the error in the absolute acceleration and the error in the natural frequencies of the fundamental modes, and it avoids the expensive modal testing for correlation.


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    Titel :

    Use of Base Force Assurance Criterion for Spacecraft Structure Model Correlation


    Beteiligte:

    Erschienen in:

    Erscheinungsdatum :

    2015-03-17


    Format / Umfang :

    9 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch