Flexible Multibody Dynamic Analysis using Reduced Deformation Modes

초록

This paper presents an efficient method for flexible multibody dynamic analysis. The proposed method is the one using reduced deformation modes which are obtained from the finite element model with reduced nodal degrees of freedom. Total nodal degrees of freedom of a finite element model are devided into master and slave ones. And then the reduced model corresponding to the master nodal degrees of freedom is obtained, and reduced deformation modes are computed from the reduced model. Flexibility information corresponding to the reduced deformation modes is economically obtained in terms of nodal coordinates, mode shapes, modal stiffness matrix, modal mass matrix and lumped mass matrix. The effectiveness of the proposed method is verified in numerical examples of a high speed rotating beam and a bump-passing mini-bus.