Model calibration of a locally non-linear structure utilizing multi harmonic response data
Paper i proceeding, 2014

Model correlation and model calibration using test data are natural ingredients in the process of validating computational models. Here, model calibration for the important sub-class of non-linear systems consisting of structures dominated by linear behavior having presence of local non-linear effects is studied. The focus is on the selection of uncertain model parameters together with the forming of the objective function to be used for calibration. To give precise estimation of parameters in the presence of measurement noise, the objective function data have to be informative with respect to the parameters chosen. Also, to get useful data the excitation force is here designed to be multi-harmonic since steady-state responses at the side frequencies are shown to contain valuable information for the calibration process. In this paper, test data from a replica of the Ecole Centrale de Lyon (ECL) nonlinear benchmark together with steady-state solutions stemming from calculations using the Multi-Harmonic Balancing method are used for illustration of the proposed model calibration procedure.

Fisher information matrix






Y. Chen

Linnéuniversitetet, Växjö

Vahid Yaghoubi Nasrabadi

Chalmers, Tillämpad mekanik, Dynamik

Andreas Linderholt

Linnéuniversitetet, Växjö

Thomas Abrahamsson

Chalmers, Tillämpad mekanik, Dynamik

Proceedings, Society for Experimental Mechanics: 32nd IMAC Conference and Exposition on Structural Dynamics, 2014; Orlando, FL; United States; 3 February 2014 through 6 February 2014

2191-5652 (eISSN)

Vol. 2 97-109