%0 Journal Article
%T DAMAGE DETECTION FOR TRUSS STRUCTURES BASED ON IMPROVED RESIDUAL FORCE VECTOR METHOD<br>基于改进残余力向量法的桁架结构损伤诊断
%A 邹万杰
%A 瞿伟廉
%A 罗臻
%J 力学与实践
%D 2009
%I 
%X A damage detection method for truss structures based on an improved residual force vector method is proposed. The stiffness connectivity matrix of the truss structures is obtained by the sensitivity analysis, and the stiffness matrix perturbation of the damaged structure can be expanded to a diagonal matrix by the stiffness connectivity matrix, then with its substitution into the residual force vector equation, a new residual force vector equation expressed by the stiffness connectivity matrix is obtained, which can be solved directly, so the stiffness perturbation of truss bars is obtained, therefore, the damaged bars and the damage extents can be detected. Because the complete modal shapes are difficult to get by measurement, the complete modal shapes are obtained by modal expansion. At last, a numerical example of a truss structure is given, the effectiveness of the proposed method is verified.
%K residual force vector
%K stiffness connectivity matrix
%K modal shapes expand
%K damage identification<br>残余力向量
%K 刚度联系矩阵
%K 模态扩阶
%K 损伤识别
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=5D344E2AD54D14F8&jid=0BF5C9FB031A532ED0A6D99DC4F6181A&aid=F1861430495074753E9353EED03FB491&yid=DE12191FBD62783C&vid=4AD960B5AD2D111A&iid=E158A972A605785F&sid=2001E0D53B7B80EC&eid=1AE5323881A5ECDC&journal_id=1000-0879&journal_name=力学与实践&referenced_num=1&reference_num=11