Abstract

When a damage exists in a structure, the dynamic characteristics of the structure are changed. A great deal of effort has been elaborated to determine the position and the amount of the damage by using the natural frequencies and the mode shapes. In this paper, a theoretical method is given to detect the damage in a structure based on the changes of its natural frequencies and the mode shapes. After determining the location of the damage, a correcting factor describing a reduction in stiffness of damaged element gives the amount of the damage. This method is proved on two examples of beam structures.

Volume Subject Area:
13th Biennial Conference on Mechanical Vibration and Noise: Modal Analysis, Modeling, Diagnostics, and Control — Analytical and Experimental
Keywords:
dynamic identification, stiffness, mode shapes, eigenfrequency, damage, structure
Topics:
Damage, Mode shapes, Stiffness
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Copyright © 1991 by The American Society of Mechanical Engineers
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