摘要
为克服传统无损检测方法检测缺陷成本高、局部化等缺点,采用单输入单输出(SISO)的试验模态分析方法,对直径8 mm的不同损伤钢杆进行试验研究.通过对相应动态参数的分析,提取振型应变模态差分曲线为裂纹缺陷直接评价指标.模态分析结果表明,利用此指标能准确地判断实际损伤位置和评估损伤程度,此方法可用于工程结构缺陷的动态无损检测和评估中.
To overcome the disadvantages of the traditional non-destructive testing methods such as the high cost and localization, a single-input single-output （SISO） experimental modal analysis method was used to analyze the steel bar with the diameter of 8 mm in different damage. Strain modal difference curve was served as the evaluation index through the analysis of the corresponding dynamic parameter. The results show that the index can accurately determine the actual damage location and assess the degree of injury. The method can be used for the non- destructive testing and evaluation of the engineering structure defects in the dynamic test.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第5期691-694,共4页
Journal of Northeastern University(Natural Science)
基金
中央高校基本科研业务费专项资金资助项目(N110403012)
国家自然科学基金资助项目(50905030)
关键词
钢棒
试验模态
损伤识别
裂纹缺陷
单输入单输出
steel bar
experimental modal
damage identification
crack defect
single-inputsingle-output
