Introduction

A high-fidelity finite element model (FEM) is frequently required by response prediction, optimization design, vibration control, and damage identification. The FEM of a large-scale structure usually consists of a large number of degrees of freedom (DOFs) and many uncertain parameters. Repeatedly calculating the solutions from such a large-scale FEM is very expensive or even prohibited in terms of computational time and memory. The substructuring method analyzes the large-scale structure in a piece-wise manner rather than as a whole. The time-consuming optimization calculation, uncertainty analysis, and nonlinear calculation are constrained to the local substructure, which can effectively improve the accuracy and efficiency of model updating and damage identification. This book introduces widely used dynamic substructuring methods for model updating and damage identification of large-scale structures.