中北大学学报（自然科学版）2011，Vol.32Issue(6)：682-687,6.DOI:10.3969/j.issn.1673-3193.2011.06.006
基于应变模态分析的损伤识别方法研究
Damage Identification Method Based on Analysis of Strain Modal
摘要
Abstract
As the traditional damage identification indicator is not sensitive to the early partial damage, a damage identification indicator that can identify the position and the degree of early damage was studied based on strain modal. This indicator measured strain measurements of a series of key points, and then the technique of the parameter identification of strain modal was used to get the strain modal shape, and the differences between the strain modal shapes was gained, thus to achieve the purpose of identifying the position of early damage and degree the damage. Digital simulation and experimental results show that the strain mode shape is very sensitive to the damage at the non-modal node, and the difference between the strain modes is very sensitive to the damage at the modal node. By using these two indicators, the identification of early damage can be realized.关键词
损伤识别/应变模态/环境激励/应变模态差Key words
damage identification/ strain modal/ ambient excitation/ strain mode difference分类
通用工业技术引用本文复制引用
牛雪梅,王锋,熊晓燕,孟文俊..基于应变模态分析的损伤识别方法研究[J].中北大学学报（自然科学版）,2011,32(6):682-687,6.基金项目
国家自然科学基金资助项目(50975188) （50975188）
山西省自然科学基金资助项目(2011011019) （2011011019）
