Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Spectrum sensitivity of the flow around spring-mounted cylinder
Submission Author:
Daiane Iglesia Dolci , SP , Brazil
Co-Authors:
Bruno Carmo, Daiane Iglesia Dolci
Presenter: Daiane Iglesia Dolci
doi://10.26678/ABCM.COBEM2017.COB17-1063
Abstract
In this paper, we calculate the sensitivity of the spectrum to structural modifications for a flow around spring-mounted cylinder, in order to identify what regions of the domain are more sensitive to structural changes. To obtain the mathematical expression for the sensitivity calculation an optimization problem is considered. The sensitivity is a function of the perturbation eigen-modes (direct modes) and its respective adjoints (adjoint modes). The numerical verification of the direct modes is achieved by comparing their respective eigenvalues with results of the literature. Next, the adjoint modes are verified by comparing its respective eigenvalues with the eigenvalues associated to the direct modes. The sensitivity analysis is applied in the flow past by an elastically mounted cylinder in the laminar flow regime. In the numerical simulations, the Spectral/hp element is used for spatial discretization and the Arnoldi is employed method to compute the eigenvalues.
Keywords
Adjoint method, Sensitivity analysis, fluid-structure interaction (FSI)
