文献类型：期刊文献

英文题名：An Exact Approach for Structural Damage Assessment

作者：Yang, Q.W.[1]

机构：[1]Shaoxing Univ, Dept Civil Engn, Shaoxing 312000, Peoples R China

年份：2013

卷号：2013

外文期刊名：MATHEMATICAL PROBLEMS IN ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:000327639000001)、、EI(收录号：20135117097357)、Scopus(收录号：2-s2.0-84890100831)、WOS

基金：This work is supported by National Natural Science Foundation of China (11202138) and Zhejiang Province Natural Science Foundation (Y1110949).

语种：英文

外文关键词：Sandwich structures - Stiffness - Stiffness matrix - Structural analysis

外文摘要：An exact approach is proposed for damage identification in statically determinate structures. The contribution of this study is twofold. Firstly, a rigorous disassembly formulation of structural global flexibility matrix is presented based on the matrix spectral decomposition, which can provide an exact relationship between the modifications of structural stiffness parameters and the associated flexibility matrix. Secondly, the static minimum-rank flexibility change is derived to obtain the exact flexibility change before and after damage. The proposed method is economical in computation and is simple to implement. For the statically determinate structures, the proposed method can exactly compute the elemental perturbed stiffness parameter only using a few of incomplete static displacement data. The efficiency of the proposed method is demonstrated by two statically determinate structures.