A FREQUENCY-DOMAIN METHOD OF STRUCTURAL DAMAGE IDENTIFICATION FORMULATED FROM THE DYNAMIC STIFFNESS EQUATION OF MOTION

✍ Scribed by U. LEE; J. SHIN

• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 739 KB
• Volume: 257
• Category: Article
• ISSN: 0022-460X
• DOI: 10.1006/jsvi.2002.5058

✦ Synopsis

This paper introduces a frequency-domain method of structural damage identi"cation. It is formulated in a general form from the dynamic sti!ness equation of motion for a structure and then applied to a beam structure. Only the dynamic sti!ness matrix for the intact state appears in the "nal form of the damage identi"cation algorithm as the structure model. The appealing features of the present damage identi"cation method are: (1) it requires only the frequency response functions experimentally measured from the damaged structure as the input data, and (2) it can locate and quantify many local damages at the same time. The feasibility of the present damage identi"cation method is tested through some numerically simulated damage identi"cation analyses and then experimental veri"cation is conducted for a cantilevered beam with damage caused by introducing three slots.