Model updating is an inverse problem to identify and correct uncertain modeling parameters, which leads to better predictions of the dynamic behavior of a target structure. This study presents a direct physical property adjustment method and the substructure energy approach, which can accurately update the stiffness and mass matrices of lattice structures using incomplete eigenvectors measured from critical substructures. For validation, the proposed method is applied to update models of a mass-spring system, a two-dimensional, and a three-dimensional lattice structure.
This work was supported by the National Natural Science Foundation of China (50928601 and 11002133), National Science Foundation (CMMI-0643726), World Class University program through the National Research Foundation of Korea (R32-2008-000-20042-0), Changjiang Scholar Program from Ministry of Education of China, Key Program of CAEP Science and Technology Fund (2010A0203007), and National 973 Basic Research Program of China (2006CB601206).
- Lattice structure
- Modal analysis
- Model updating