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FEM Calibration with FRF Damping Equalization

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Model Validation and Uncertainty Quantification, Volume 3

Abstract

A finite element model calibration procedure that uses frequency response function data and relies on damping equalization is presented. In this, the dampings of the finite element model and the corresponding experimental model are set equal before calibration. The damping equalization is made to avoid the mode pairing problem that normally needs to be solved in other model updating procedures. It is demonstrated that one particular use of frequency response data gives a calibration deviation metric that is smooth in the variation of model parameters and give a large radius of convergence to the calibration minimum. The method is combined with model reduction for increased speed and employs a minimizing procedure that employs randomized multiple starting points in the parameter space to get to the calibration solution. The performance of the calibration procedure is demonstrated by two numerical examples.

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Acknowledgement

We are grateful to Quartus Engineering, Inc., for generously letting us use and distribute the satellite FE model.

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Authors and Affiliations

  1. Department of Applied Mechanics, Chalmers University of Technology, S41296, Göteborg, Sweden

    Thomas J. S. Abrahamsson

  2. Department of Engineering Physics, University of Wisconsin - Madison, Madison, WI, 53706, USA

    Daniel C. Kammer

Authors
  1. Thomas J. S. Abrahamsson
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  2. Daniel C. Kammer
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Corresponding author

Correspondence to Thomas J. S. Abrahamsson .

Editor information

Editors and Affiliations

  1. Civil Engineering Department, Clemson University, Clemson, North Carolina, USA

    H. Sezer Atamturktur

  2. Department of Civil and Envt. Eng., Tufts University, Medford, Massachusetts, USA

    Babak Moaveni

  3. Department of Mech. & Industrial Eng., University of Thessaly, Volos, Greece

    Costas Papadimitriou

  4. Sandia National Laboratories, Albuquerque, New Mexico, USA

    Tyler Schoenherr

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© 2014 The Society for Experimental Mechanics, Inc.

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Abrahamsson, T.J.S., Kammer, D.C. (2014). FEM Calibration with FRF Damping Equalization. In: Atamturktur, H., Moaveni, B., Papadimitriou, C., Schoenherr, T. (eds) Model Validation and Uncertainty Quantification, Volume 3. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-04552-8_26

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  • DOI: https://doi.org/10.1007/978-3-319-04552-8_26

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-04551-1

  • Online ISBN: 978-3-319-04552-8

  • eBook Packages: EngineeringEngineering (R0)

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