| Title |
Damage Detection of Truss Structure based on the Predicted Change of Parameter Matrices |
| Authors |
Kang, Taik-Seon ; Lee, Byeong-Hyeon ; Eun, Hee-Chang |
| DOI |
https://doi.org/10.5659/JAIK_SC.2018.34.1.27 |
| Keywords |
damage detection ; residual force ; eigenfunction ; parameter matrix |
| Abstract |
This work provides the analytical methods to represent the updated form of stiffness or flexibility matrices using the measurements of the first few natural frequencies and the corresponding mode shapes. This study derives the mathematical forms on the variance of stiffness or flexibility matrices to minimize the performance index in the satisfaction of the eigen-function including the residual force depending on the measured data. The proposed methods can be utilized in detecting damage and updating the parameter matrices deviated from the analytical parameter matrices. The validity of the proposed methods is investigated in a numerical experiment of truss structure and the numerical results of stiffness-based and flexibility-based methods are compared. The sensitivity to the external noise is also examined for applying to the practical work. |