Sensitivity of Parameter Changes in Structural Damage Detection

Article type: Research Article

Authors: Jenkins, C. H. | Kjerengtroen, L. | Oestensen, H.

Affiliations: Mechanical Engineering Department, South Dakota School of Mines and Technology, Rapid City, SD 57701

Abstract: Structural damage detection by nondestructive methods is highly desirable. Changes in modal parameters such as frequency, damping, and mode shape are particularly inviting. Evidence is presented here that reveals that static deflection can, in many cases, be a more sensitive predictor of structural damage than frequency. The reasons for this are illuminated within, and hinge on very fundamental issues about the very nature of structural response. Furthermore, static deflection measurements are often easier to make, with higher levels of accuracy than dynamic measurements. Comparisons are made between theoretical models and experimental results for simple structures, with extensions given to more complex structures.

DOI: 10.3233/SAV-1997-4103

Journal: Shock and Vibration, vol. 4, no. 1, pp. 27-37, 1997