Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
MEASUREMENT UNCERTAINTIES IN WAVENUMBER CHARACTERIZATION OF STRUCTURAL BEAMS
Submission Author:
Alberto Carlos Guimarães Castro Diniz , DF , Brazil
Co-Authors:
Rodolfo Morais, Alberto Carlos Guimarães Castro Diniz, Pedro Henrique de Melo Casado Matos, Adriano Todorovic Fabro
Presenter: Alberto Carlos Guimarães Castro Diniz
doi://10.26678/ABCM.COBEM2019.COB2019-0816
Abstract
The measurement uncertainty estimation in experimental characterization of the wavenumber of structural beams, using a global method of sensitivity analysis, is presented. The importance of correctly quantifying measurement uncertainties is critical to ensuring the reliability of results. However, due to the complexity of the wavenumber characterization method, which involves different stages, spectral analysis and identification procedures, the classic GUM Framework is not appropriate to estimate the measurement uncertainty. Alternatively, it is proposed to use the FAST method to determine the sensitivity coefficients and from them the expanded uncertainty associated with the number of waves.This methodology is described and compared to the classic GUM procedure. The results are also presented for two case studies: a polyamide beam with resonators and a steel beam.
Keywords
FAST method, GUM framework, Global sensitivity analysis, ISO-GUM
