FEM calibration with FRF damping equalization

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• 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. © The Society for Experimental Mechanics, Inc. 2014.

Ämnesord

NATURVETENSKAP  -- Geovetenskap och miljövetenskap -- Geofysik (hsv//swe)

NATURAL SCIENCES  -- Earth and Related Environmental Sciences -- Geophysics (hsv//eng)

Nyckelord

Calibration procedure

Mode-matching-free comparison

Experimental modeling

Frequency response

FE model calibration

Structural dynamics

Calibration solutions

Finite element method

Damping

Equalizers

Damping equalization

Finite element model calibrations

Mode matching

Radius of convergence

Frequency response functions

FE model

Frequency response calibration

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kon (ämneskategori)

ref (ämneskategori)