文献类型：期刊文献

中文题名：网架结构损伤检测的一种方法

英文题名：Damage detection technique for reticulated structures

作者：杨秋伟[1];刘济科[2]

机构：[1]绍兴文理学院土木工程系;[2]中山大学应用力学与工程系

年份：2009

卷号：28

期号：2

起止页码：22

中文期刊名：振动与冲击

外文期刊名：Journal of Vibration and Shock

收录：CSTPCD、、EI(收录号：20091211971046)、Scopus(收录号：2-s2.0-62249167249)、CSCD2011_2012、北大核心2008、北大核心、CSCD

基金：国家自然科学基金(10772202);浙江省教育厅科研计划项目(20070503);高等学校博士学科点专项科研基金(20050558032);广东省自然科学基金(07003680;05003295)资助项目

语种：中文

中文关键词：损伤检测;网架结构;刚度联系向量;灵敏度

外文关键词：damage detection;reticulated structure;stiffness connectivity vector;sensitivity

中文摘要：从网架结构单元刚度矩阵的分解出发,导出单元刚度联系向量,由各单元刚度联系向量和损伤前后振型变化向量之间的点积来判别可能的损伤单元,利用频率灵敏度法来计算损伤程度。以一个网架结构为例对所提方法作了验证。结果表明:所提方法计算简单,在测量数据有误差的情况下也能较好地识别出损伤位置和程度。

外文摘要：A simple and effective method to detect damages in reticulated structures was presented,which approaches the problem of damage location and extent determination in a decoupled fashion.The elemental stiffness matrix of the reticulated structure was decomposed to obtain the elemental stiffness connectivity vector.Then a damage localization criterion was defined as the dot matrix of the elemental stiffness connectivity vector multiplied by the change of eigenvector.Subsequently the probable damaged elements can be determined according to the relatively larger element values in the localization vector constituted by the damage localization criterions of all the elements.With the probable damage locations determined,the eigenvalue perturbation technique was employed to estimate damage locations and extents more accurately.The proposed method was demonstrated on a reticulated structure and its efficiency was discussed through a damage simulation.The results show that the proposed technique can give good prediction for both single and multiple damage cases even if noise is present.