Using of model updating considering damped frequency response function

Pereira, J. A.; Borges, A. S.

Using of model updating considering damped frequency response function

Date

2002-01-01

Authors

Pereira, J. A.

Borges, A. S.

Publisher

Soc Experimental Mechanics Inc

Type

Work presented at event

Access right

Acesso aberto

Abstract

The search for better performance in the structural systems has been taken to more refined models, involving the analysis of a growing number of details, which should be correctly formulated aiming at defining a representative model of the real system. Representative models demand a great detailing of the project and search for new techniques of evaluation and analysis. Model updating is one of this technologies, it can be used to improve the predictive capabilities of computer-based models. This paper presents a FRF-based finite element model updating procedure whose the updating variables are physical parameters of the model. It includes the damping effects in the updating procedure assuming proportional and none proportional damping mechanism. The updating parameters are defined at an element level or macro regions of the model. So, the parameters are adjusted locally, facilitating the physical interpretation of the adjusting of the model. Different tests for simulated and experimental data are discussed aiming at defining the characteristics and potentialities of the methodology.