Validation of a model calibration method through vibrational testing of a mechanical system with local clearance
Paper in proceedings, 2016

Nonlinear finite element models are often validated using experimental data. A previously proposed calibration method, which concerns pre-test planning, multi-sinusoidal excitation and an effective optimization routine, is improved with an extended version of the pre-test planning. The improved method is validated using a test structure with a clearance type nonlinearity. From the pretest planning, an optimal configuration for the data acquisition is determined. The multi-harmonic nonlinear frequency response functions (FRFs) of the structure under test are then generated by a multi-sinusoidal excitation. Model calibration is conducted by minimizing the difference between the experimental multi-harmonic nonlinear FRFs and their analytical counterparts. The uncertainties of the estimated parameters are assessed by a k-fold cross validation, which confirm that the uncertainties of the estimated parameters are small when the optimal configuration is applied.



Y. Chen

Linnaeus University, Växjö

Andreas Linderholt

Linnaeus University, Växjö

Thomas Abrahamsson

Chalmers, Applied Mechanics, Dynamics

Y. X. Xia

University of the West of England

M. I. Friswell

Swansea University

Proceedings of Isma2016 International Conference on Noise and Vibration Engineering and Usd2016 International Conference on Uncertainty in Structural Dynamics, ED. BY Sas, P; Moens, D; VanDeWalle, A.


Subject Categories

Mechanical Engineering