RESEARCH OF STRUCTURAL DAMAGE IDENTIFICATION METHOD BASED ON THE SUBSTRUCTURE ANALYSIS

摘要

The computational efficiency is usually very low by common methods in large-scale civil engineering structures which contain a large number of degrees of freedom.In order to reduce freedom and decrease the amount of numerical analysis and computation,it is necessary to divide a global structure into substructures which can effectly improve the computational efficiency.In this paper,a substructure method is used to the structural damage identification.The main idea of this article is,first,the whole structure is divided into two substructures.Then,the internal degrees of freedom of one of the substructure is to be condensed using an improved Guyan theory.Last,it needs to integrate the two substructures into a whole structure with the interface displacement synthesis method.Thus the new structure can be identified using the residual force vector method.The result simulated on a plane struss showed this new method is able to achieve a high level accuracy.