A Coupled Sensitivity Method for Structural Damage Detection
Based on the vibration information, a mixed sensitivity method is presented to identify structural damage by combining the eigenvalue sensitivity with the generalized flexibility sensitivity. The sensitivity of structural generalized flexibility matrix is firstly derived by using the first frequency and the corresponding mode shape only and then the eigenvalue sensitivity together with the generalized flexibility sensitivity are combined to calculate the elemental damage parameters. The presented mixed perturbation approach is demonstrated by a numerical example concerning a simple supported beam structure. It has been shown that the proposed procedure is simple to implement and may be useful for structural damage identification.
Xiancan Deng and Xufeng Dong
J. Li and P. J. Wei, "A Coupled Sensitivity Method for Structural Damage Detection", Advanced Materials Research, Vol. 681, pp. 271-275, 2013