Model order reduction for dynamic simulation of a flexible multibody system via absolute nodal coordinate formulation

摘要: Abstract The Absolute Nodal Coordinate Formulation (ANCF) can be used to model a flexible multibody system subject both overall motions and large deformations. With an increasing number of finite elements ANCF mesh bodies, however, the computation cost will become extremely high. To improve computational efficiency for large-scaled system, systematic method is proposed in this study order reduction based on proper orthogonal decomposition Galerkin projection. At first, approach selection reduced constraint equations deal with singularity coefficient matrix Reduced-Order Model (ROM). Then, stiffness generalized force vector ROM are parallelized via OpenMP directives. Afterwards, two parametric approaches presented make adaptive change parameters. One interpolation reduced-order basis vectors manifold obtain ROM, other fast-to-slow extracted from fast dynamic responses simulate slow responses. Finally, four numerical examples given validate efficacy simulations rigid systems.