摘要
由于大型复杂结构参数识别困难,提出将频响函数型模型修正方法与子结构方法结合进行损伤识别。构造一个关于损伤频响函数的优化方程。通过子结构有限元模型向损伤后频响函数修正的过程,识别损伤参数。以一个三层平面刚架为数值算例,计算结果表明该算法对损伤参数较为敏感,识别精度较高,可以准确识别出预设的子结构损伤单元和损伤程度。
Due to the difficulty in identifying parameters of a large and complex structure, a damage identification method was proposed combining model updating based on the frequency response function(FRF) method with the substructure method. An optimization equation about the FRF after damage was constructed, and the damage parameters were identified by updating the substructure finite element model(FEM) to FRF after damage. A three-layer plane frame was used as a numerical example. The calculation results show that the algorithm is more sensitive to damage parameters and has higher recognition accuracy. The method can accurately identify the predefined substructure damage elements and damage degrees.
作者
方有亮
娄佳琪
张颖
李宗娆
侯童非
FANG You-liang;LOU Jia-qi;ZHANG Ying;LI Zong-rao;HOU Tong-fei(College of Civil Engineering and Architecture,Hebei University,Baoding 071002,China;Technology Innovation Center for Testing and Evaluation in Civil Engineering of Hebei Province,Baoding 071002,China)
出处
《科学技术与工程》
北大核心
2020年第18期7356-7362,共7页
Science Technology and Engineering
基金
河北省建设科技研究计划项目(2019-07-01)
河北省建设科技研究计划项目(2019-07-02)。
关键词
子结构
Guyan缩聚
频响函数
损伤识别
substructure
Guyan reduction
frequency response function
damage identification