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Model Updating of Complex Assembly Structures Based on Substructures-Joint Parameters

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Topics in Model Validation and Uncertainty Quantification, Volume 4

Abstract

To study the dynamic behavior of complex assembled structures consisting of several substructures and real joints connecting them, an updated finite element model of the associated structure is required. This paper presents a new technique to create an accurate updated finite element model of such structures. Given the fact that modal testing of real joints (such as bolt with some washers) are almost impossible; in this research the updated model of the assembled structures is constructed by utilizing parametric finite element model of the joint in conjunction with modal testing of the assembly structure and its substructures. In this paper, eigen-sensitivity method (used for characterizing cost function) and genetic algorithm (used for minimization scheme) are employed to update the assembled structure as well as substructures. A laboratory-scale unsymmetrical cross-beam is employed as the case study. The actual dynamic properties of the joint (including stiffness, mass and damping matrix) of this structure were estimated. The accuracy of the estimated parameters of the model was examined by comparison of the FRFs of the real assembled structure with the ones of the updated model. By achieving full compliance between these FRFs, the accuracy and efficiency of the proposed method, in a wide frequency range, is demonstrated.

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Author information

Authors and Affiliations

  1. Tabriz University, Tabriz, Iran

    Morteza H. Sadeghi & Parivash Soleimanian

  2. Middle East Technical University, Ankara, Turkey

    Hamed Samandari

Authors
  1. Morteza H. Sadeghi
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  2. Parivash Soleimanian
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  3. Hamed Samandari
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Corresponding author

Correspondence to Parivash Soleimanian .

Editor information

Editors and Affiliations

  1. Sandia National Laboratories, Albuquerque, 87185-0708, USA

    T. Simmermacher

  2. University of Franche-Comte, Besançon, France

    S. Cogan

  3. NASA Langley Research Center, Hampton, 23665, USA

    L.G. Horta

  4. University of Sheffield, Sheffield, United Kingdom

    R. Barthorpe

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© 2012 The Society for Experimental Mechanics, Inc. 2012

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Sadeghi, M.H., Soleimanian, P., Samandari, H. (2012). Model Updating of Complex Assembly Structures Based on Substructures-Joint Parameters. In: Simmermacher, T., Cogan, S., Horta, L., Barthorpe, R. (eds) Topics in Model Validation and Uncertainty Quantification, Volume 4. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-2431-4_18

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  • DOI: https://doi.org/10.1007/978-1-4614-2431-4_18

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  • Publisher Name: Springer, New York, NY

  • Print ISBN: 978-1-4614-2430-7

  • Online ISBN: 978-1-4614-2431-4

  • eBook Packages: EngineeringEngineering (R0)

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