Structural health monitoring of AVLB


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06/06/2004

Damage detection in AVLB

 AVLB stands for Armored Vehicle Launched Bridge. I have designed a system for performing damage detection and localization in AVLB using vibration data. Specifically, the damage detection method is based on a modified method of strain energy mode shapes.

Video on the bottom of this page shows the system in action. You should "enable active content" in Internet Explorer to view the video.

The bridge is installed on airbags and excited by band-limited white noise. A scanning laser vibrometer installed on a robotic gantry crane can be positioned at any location above the bridge with accuracy of 5mm. A frequency response function (FRF) is computed between excitation measured by a force transducer and response of the bridge. A grid of points is scanned along each girder and displacement (bending) modeshapes are computed for the bridge. Then a sequence of signal processing and a fuzzy expert system identify possible damage and its location.

Publications

·     Optimal spatial sampling interval for damage detection by curvature or strain energy mode shapes, E. Sazonov, P. Klinkhachorn, Journal of Sound and Vibration, Volume 285, Issue 4-5, p. 783-801, 08/2005.

·     Non-baseline detection of small damages from changes in strain energy mode shapes E. S. Sazonov, P. Klinkhachorn, U. B. Halabe, H. V. S. GangaRao, Non-Destructive Testing and Evaluation,  Taylor & Francis Publishing, Volume 18, Numbers 3-4 / July 2003, Pages: 91 – 107.

·     Fuzzy logic expert system for automated damage detection from changes in strain energy mode shapes, Edward S. Sazonov, Powsiri Klinkhachorn, Hota V.S. GangaRao, and Udaya B. Halabe. Non-Destructive Testing and Evaluation, Taylor & Francis Publishing, Volume 18, Number 1/2002, Pages 1 - 17. 

·     An Automated Damage Detection System for Armored Vehicle Launched Bridge” Dissertation, Sazonov, Eduard S. (2002). West Virginia University, Available: http://etd.wvu.edu/templates/showETD.cfm?recnum=2497

·     Automated Laser Sensor System, Srinivas Aluri, Eduard Sazonov, Hota V. S. GangaRao, Samer H. Petro, Powsiri Klinkachorn, Structural Materials Technology Conference: NDE/NDT for Highways and Bridges Topical, September 10-13, 2002, Cincinnati, Ohio.

·     Non-baseline damage detection from changes in strain energy mode shapes. Experiments on Armored Vehicle Launched Bridge, Edward S. Sazonov, Powsiri Klinkhachorn, Hota V.S. GangaRao, Udaya B. Halabe. Proceedings of 29th Annual Review of Progress in Quantitative Nondestructive Evaluation (QNDE). July 2002, Bellingham, WA.

·     Enhancing accuracy of data acquired by a laser vibrometer in a field setting Edward S. Sazonov, Powsiri Klinkhachorn, Hota V.S. GangaRao, Udaya B. Halabe. Proceedings of 28th Annual Review of Progress in Quantitative Nondestructive Evaluation (QNDE). August 2001, Brunswick, Maine.

·     An automated damage detection system for AVLB, Edward S. Sazonov, Powsiri Klinkhachorn, Hota V.S. GangaRao, Udaya B. Halabe. Proceedings of 28th Annual Review of Progress in Quantitative Nondestructive Evaluation (QNDE). August 2001, Brunswick, Maine.

AVLB Video

Video should play below. If you do not see it, click here to download.

 

AVLB

Structural health monitoring, damage detction, strain energy mode shapes, AVLB, fuzzy expert system, damage localization, bridge monitoring, displacement mode shapes

Structural health monitoring, damage detction, strain energy mode shapes, AVLB, fuzzy expert system, damage localization, bridge monitoring, displacement mode shapes

Structural health monitoring, damage detction, strain energy mode shapes, AVLB, fuzzy expert system, damage localization, bridge monitoring, displacement mode shapes

Structural health monitoring, damage detction, strain energy mode shapes, AVLB, fuzzy expert system, damage localization, bridge monitoring, displacement mode shapes

Structural health monitoring, damage detction, strain energy mode shapes, AVLB, fuzzy expert system, damage localization, bridge monitoring, displacement mode shapes

Structural health monitoring, damage detction, strain energy mode shapes, AVLB, fuzzy expert system, damage localization, bridge monitoring, displacement mode shapes

Structural health monitoring, damage detction, strain energy mode shapes, AVLB, fuzzy expert system, damage localization, bridge monitoring, displacement mode shapes