摘要
提出了一种用交叉模型交叉模态(Cross Model Cross Mode,CMCM)方法与L1正则化结合的损伤识别方法。首先介绍了CMCM方法的基本原理,以及L2正则化与L1正则化的特点。然后通过一个实验室的钢框架结构对提出的方法进行了验证。结果表明,CMCM方法与L2正则化结合容易造成非损伤单元的误判,而在CMCM方法中使用L1正则化则能更准确地识别结构的损伤。即使仅用第一阶测量模态,用L1正则化技术求解CMCM方程也能很准确地识别框架结构的损伤。
A damage identification method based on CMCM and L1 regularization is proposed.Firstly,the basic principle of cross modal method and the characteristics of L2 regularization and L1 regularization are introduced.The proposed method was then validated with a steel frame structure in a laboratory.The results show that the combination of CMCM and L2 regularization can easily lead to misjudgment of undamaged elements,while L1 regularization in CMCM can identify structural damage more accurately.Even if only the first measurement mode is used,the L1 regularization technique can be used to solve the CMCM equation to accurately identify the damage of the frame structure.
作者
靳帮虎
宋彦朋
邱虎
JIN BangHu;SONG YanPeng;QIU Hu(School of Civil Engineering,Wuhan Huaxia Institute of Technology,Wuhan 430227,China;School of Civil Engineering,College of Post and Telecommunication of Wuhan Institute of Technology,Wuhan 430073,China;School of Civil Engineering and Architecture,Wuhan Institute of Technology,Wuhan 430073,China;State Grid Electric Power Research Institute Wuhan Nanrui Co.,Ltd.,Wuhan 430074,China)
出处
《机械强度》
CAS
CSCD
北大核心
2023年第6期1509-1513,共5页
Journal of Mechanical Strength
基金
湖北省教育厅科学技术研究计划指导性项目(B2021389)资助。
关键词
L1
正则化
损伤识别
交叉模型交叉模态
模型修正
L1 regularization
Damage identification
Cross model cross mode(CMCM)
Model updating
