A Numerical Study on the Damage Assessment of a Simply-supported Beam on Natural Frequencies
GUO Guo hui,YI Wei jian
DOI:10.11835/j.issn.1674-4764.2001.02.004
Received ,Revised July 06, 2000, Accepted , Available online July 01, 2015
Volume ,2001,Pages 17-21
- Abstract
Based on the perturbation theory, it was proved that the ratio of changes of frequencies is the function of structural damage location. Taking a uniform cross-sectioned simply supported beam for example, the ratio of changes of frequencies between the damaged and intact beam was used to locate and qualify beam damage. For different extents of damage, the changes of frequencies and ratio of changes of frequencies were studied and the effects resulted from the omission of second order items were discussed. Finally, the deficiency of this method was pointed out.