Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
FLUTTER ANALYSIS TOOLS IN A NONLINEAR STRUCTURAL-FLIGHT DYNAMICS NUMERICAL PLATFORM
Submission Author:
Luiz Felipi Ribeiro Siqueira , Buscando endereço... , Brazil
Co-Authors:
Luiz Felipi Ribeiro Siqueira, Marcelo Sousa, Sebastião Simoes Cunha Jr, Flavio Luiz Cardoso-Ribeiro
Presenter: Sebastião Simoes Cunha Jr
doi://10.26678/ABCM.COBEM2019.COB2019-0226
Abstract
A numerical model of an airplane done with Nonlinear Flight Dynamics– Nonlinear Structural Dynamics– Strain-based formulation (NFNS_S) methodology is used as a basis to create numerical tools to extract sufficient data to support a flutter physical analysis, which is the main objective of this research. The numerical code was updated to store the matrices of eigenvalues and eigenvectors at each trimmed condition. Furthermore, it is possible to filter the aeroelastic modes of interest, calculate the results and plot the charts of frequency, damping ratio, amplitude, and phase. These results provide support for future analysis about the physical mechanism of flutter and solutions that can be applied to avoid the phenomenon and improve aircraft’s design.
Keywords
flexible aircraft, numerical model, code update, Flutter, Aeroelasticity
