基于广义模态柔度矩阵的结构损伤识别  

Structural Damage Identification Based on Generalized Modal Flexibility Matrix

作　　者：谢少鹏 吴柏生 钟慧湘 XIE Shaopeng;WU Baisheng;ZHONG Huixiang(School of Electromechanical Engineering,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]广东工业大学机电工程学院,广州510006

出　　处：《吉林大学学报（理学版）》2020年第3期518-526,共9页Journal of Jilin University:Science Edition

基　　金：国家自然科学基金(批准号:11672118).

摘　　要：用最小平方正交三角分解(LSQR)法研究结构损伤识别问题,首先提出一种损伤定位方法,然后将基于广义模态柔性矩阵的损伤识别问题转化为最小二乘问题,最后用LSQR方法逐步确定损伤的位置和程度.所给算例验证了方法的有效性.We used least square QR-factorization(LSQR)method to study the problem of structural damage identification.Firstly,we proposed a damage location method.Secondly,the damage identification problem based on the generalized modal flexibility matrix was transformed into a least squares problem.Finally,the LSQR method was used to progressively determine the location and extent of damage.The effectiveness of the proposed method was verified by two examples.

关 键 词：广义模态柔度矩阵 损伤识别 LSQR法 

分 类 号：O327[理学—一般力学与力学基础]