Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
PARAMETRIC POD-BASED MODEL ORDER REDUCTION OF MULTIBODY SYSTEM DYNAMICS BASED ON THE ABSOLUTE NODAL COORDINATE FORMULATION
Submission Author:
Matheus Basílio Rodrigues Fernandes , SP
Co-Authors:
Matheus Basílio Rodrigues Fernandes, Thiago de Paula Sales, Domingos Rade, Andre Fernando de Castro da Silva
Presenter: Matheus Basílio Rodrigues Fernandes
doi://10.26678/ABCM.COBEM2021.COB2021-0998
Abstract
The absolute nodal coordinate formulation (ANCF) is the state-of-art in the computational modeling of flexible multibody dynamics. However, as the accuracy requirements of the ANCF model become more stringent, or the number of bodies raises, the number of ANCF elements increases, bringing the model to be artificially high-dimensional. To improve the computational efficiency of the ANCF for large systems, a model order reduction based on the proper orthogonal decomposition (POD) and Galerkin projection is proposed. Also, to permit the reduced-order model (ROM) to be adaptative to the variation of system parameters, a methodology based on an interpolation of the ROMs in a manifold is used. Finally, two numerical examples of flexible systems undergoing large reference motions and large deformations are used to verify the accuracy of the proposed methodology.
Keywords
Flexible Multibody System Dynamics, Absolute Nodal Coordinate Formulation (ANCF), Parametric Model Order Reduction, Proper orthogonal decomposition (POD)
