基于传递率函数的结构损伤识别

Structural Damage Identification Based on Transmissibility Function

针对结构健康监测问题,采用一种基于传递率函数的结构损伤识别方法进行损伤识别.首先在结构健康状态和损伤状态下计算得到相邻2点的加速度传递率函数,利用不同状态下的加速度传递率函数构建传递率矩阵,进而在此基础上进行主成分分析,并以2种状态下的主成分有无发生偏离为依据来判断结构是否发生了损伤;最后以较复杂的三维桁架结构为例,验证其所采用方法的可行性.结果表明:该方法可以有效地对结构进行损伤预警判别和损伤位置识别。

For structural health monitoring,a structural damage identification method based on transfer rate function is used for damage identification.First,the acceleration transfer rate function of two adjacent points is calculated in the structural health state and damage state,and the acceleration transfer in different states is used.Rate function is used to construct the transfer rate matrix,and then the principal component analysis is carried out on this basis;finally,whether the principal components in the two states deviate or not is used as the basis to determine whether the structure has been damaged.The more complex three-dimensional truss structure is used as an example to verify the feasibility of the method used.The results show that this method can effectively carry out damage early warning and damage location identification of the structure.