计算力学学报2018，Vol.35Issue(3)：321-325,5.DOI:10.7511/jslx20170227002
考虑质量变化的刚架结构损伤识别方法研究
Study on damage identification frame structures considering mass change
摘要
Abstract
Because damage is accompanied by the decrease of the mass of the structure when structural elements have gaps,a damage identification method considering mass change was presented.Here,structural damage was defined by the reduction of element cross-sectional area.Firstly,Fractional modal strain energy index was applied to detect the damage position precisely,then the elemental stiffness matrix was considered as the combination of stiffness matrices contributed by different sectional properties,and multiple indexes were used to describe elemental damage.Subsequently,the least-square technique was used to solve damage equation with multiple indexes.Numerical example results indicated that the proposed method is capable of realizing the accurate damage localization and the precise damage quantification considering even a certain noise level.关键词
质量变化/刚度矩阵分解/模态应变能/损伤识别/多指标识别Key words
mass change/stiffness matrix decomposition/modal strain energy/damage identification/multi-index identification分类
建筑与水利引用本文复制引用
梁振彬,董聪..考虑质量变化的刚架结构损伤识别方法研究[J].计算力学学报,2018,35(3):321-325,5.基金项目
国家电网公司科技项目(GC71-12-001)资助项目. （GC71-12-001）
