Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
QUANTIFICATION OF MATERIAL UNCERTAINTIES IN MODAL ANALYSIS OF A PLATE USING A GAUSSIAN PROCESS AND FINITE ELEMENT METHOD
Submission Author:
Thiago Henrique Gomes Lobato , PA , Germany
Co-Authors:
Thiago Henrique Gomes Lobato, Rodrigo Godoy da Fonseca, Newton Soeiro
Presenter: Thiago Henrique Gomes Lobato
doi://10.26678/ABCM.COBEM2017.COB17-1525
Abstract
Numerical simulations are very useful in designs to predict what response a system will have after it is built. Those predictions, however, are bounded to uncertainty due to many things as simplifications of the models, lack of knowledge of the exact real state of a system, materials properties deviations and so on. This work focus in the study of that last type of uncertainty in computational modal analysis, the goal is to see how to quantify, with the minimum computational cost possible, property variation in natural frequencies. To do this, a Gaussian process approach was used, avoiding the necessity of too many evaluations as in the Monte Carlo method and allowing a better understanding of the results and more robust models. A plate was used to avoid geometry uncertainties due to its easy modeling.
Keywords
modal analysis, uncertainty, Gaussian Process, Simulation
