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TECHNICAL PAPERS

Vibration-Based Damage Identification in Structures Exhibiting Axial and Torsional Response

[+] Author and Article Information
T. A. Duffey, S. W. Doebling, C. R. Farrar, W. E. Baker, W. H. Rhee

Engineering Analysis Group, Engineering Sciences & Applications Division, Los Alamos National Laboratory, Los Alamos, NM 87545

J. Vib. Acoust 123(1), 84-91 (Apr 01, 2000) (8 pages) doi:10.1115/1.1320445 History: Received February 01, 2000; Revised April 01, 2000
Copyright © 2001 by ASME
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References

Figures

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Schematic of analytical 8DOF system
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Change in modal frequency with 10 percent damage
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Change in first mode shape with 10 percent damage
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Change in eighth mode shape with 10 percent damage
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Damage index results for simulated 8DOF system −10 percent Damage in element 3
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Change in flexibility for 10 percent damage in: (top) element 1; (middle) element 2; (bottom) element 3
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Change in flexibility for simultaneous damage at elements 3 and 6
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Influence of number of modes on detection of damage in element 4
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Schematic of experimental 8DOF system
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Experimental 8DOF system with excitation shaker attached
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Damage index results for experimental 8DOF system −24 percent damage in element 1
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Damage index results for experimental 8DOF system −24 percent damage in element 5
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Damage index results for experimental 8DOF system −24 percent damage in element 7
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Damage index results for experimental 8DOF system −7 percent damage in element 1
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Flexibility change results for experimental 8DOF system–7 percent damage in element 1
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Flexibility change results for experimental 8DOF system–7 percent damage in element 5

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