Eventos Anais de eventos
DINAME 2023
XIX International Symposium on Dynamic Problems of Mechanics
On the Experimental Identification of Jointed Structures: Parametric and Non-Parametric Modeling Perspectives
Submission Author:
Rafael de Oliveira Teloli , France , Brazil
Co-Authors:
Rafael de Oliveira Teloli, Samuel da Silva
Presenter: Rafael de Oliveira Teloli
doi://10.26678/ABCM.DINAME2023.DIN2023-0099
Abstract
Over the past decades, the scientific community that investigates the dynamics of jointed structures has devoted a significant level of interest in designing tools for new lap-joints configurations, further insights on experimental measurements, proposing reliable predictive models, and developing contributions toward the identification field. In this context, this paper addresses the problem of identifying bolted joints from two points of view. At first, a parametric model, the Duffing-Van der Pol oscillator, is used to represent the nonlinear behavior of an Orion beam. Then, a nonparametric GP-NARX model is approached to reproduce the vibratory response of the BERT benchmark. The advantages and disadvantages of both models in representing the nonlinear behavior of bolted joints are also discussed.
Keywords
Duffing-Van der Pol model, Orion beam, BERT benchmark, GP-NARX, bolted structures
