摘要
为了提高柔度法应用于结构损伤识别的范围和准确度,提出了一种柔度曲率矩阵差的损伤识别新指标,并在柔度法理论基础上进行了改进.通过简支梁和连续梁的算例对这种识别指标的有效性进行了验证,同时采用了另外3种识别指标进行了对比.结果表明:在单处损伤和多处损伤的情况下,使用该指标仅需前一阶模态数据就能对文中梁结构进行准确的损伤定位,并对结构轻微的损伤进行了准确识别.与文中的另外3种损伤指标相比,新指标具有明显的优势,且更具准确性和广泛性.
In order to enhance the extent and precision of flexibility method applied to damage identification of structures,a new index for damage identification based on difference of flexibility curvature matrix was proposed,and was improved on the basis of flexibility theory.The availability of the identification index was verified with the calculating examples of both simple beam and continuous beam.Meanwhile,the other three identification indexes were adopted for comparison.The results show that under single damage and multiple damage conditions,only the former first mode data are needed to obtain the accurate damage location of the beam structures by using the proposed index.In addition,the precise identification for the slight damage of structures was carried out.Compared with the other three indexes,the new index has obvious superiority,precision and universality.
出处
《沈阳工业大学学报》
EI
CAS
北大核心
2012年第6期715-720,共6页
Journal of Shenyang University of Technology
基金
重庆市科技攻关计划项目(2009AB0040)
关键词
柔度
损伤识别
简支梁
连续梁
柔度曲率
柔度曲率矩阵差
一阶模态
轻微损伤
flexibility
damage identification
simple beam
continuous beam
flexibility curvature
difference of flexibility curvature matrix
first mode
slight damage
