Next Article in Journal
Using Polynomials to Simplify Fixed Pattern Noise and Photometric Correction of Logarithmic CMOS Image Sensors
Previous Article in Journal
Fluorescent Proteins as Genetically Encoded FRET Biosensors in Life Sciences
Article Menu

Export Article

Open AccessArticle
Sensors 2015, 15(10), 26315-26330; doi:10.3390/s151026315

Experimental Validation of Normalized Uniform Load Surface Curvature Method for Damage Localization

1
Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Korea
2
Agency for Defense Development, Yusong P.O.Box 35, DaeJeon 305-600, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 13 July 2015 / Accepted: 13 October 2015 / Published: 16 October 2015
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [1626 KB, uploaded 16 October 2015]   |  

Abstract

In this study, we experimentally validated the normalized uniform load surface (NULS) curvature method, which has been developed recently to assess damage localization in beam-type structures. The normalization technique allows for the accurate assessment of damage localization with greater sensitivity irrespective of the damage location. In this study, damage to a simply supported beam was numerically and experimentally investigated on the basis of the changes in the NULS curvatures, which were estimated from the modal flexibility matrices obtained from the acceleration responses under an ambient excitation. Two damage scenarios were considered for the single damage case as well as the multiple damages case by reducing the bending stiffness (EI) of the affected element(s). Numerical simulations were performed using MATLAB as a preliminary step. During the validation experiments, a series of tests were performed. It was found that the damage locations could be identified successfully without any false-positive or false-negative detections using the proposed method. For comparison, the damage detection performances were compared with those of two other well-known methods based on the modal flexibility matrix, namely, the uniform load surface (ULS) method and the ULS curvature method. It was confirmed that the proposed method is more effective for investigating the damage locations of simply supported beams than the two conventional methods in terms of sensitivity to damage under measurement noise. View Full-Text
Keywords: modal flexibility; ULS; ULS curvature; NULS; normalization; damage localization modal flexibility; ULS; ULS curvature; NULS; normalization; damage localization
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Jung, H.-Y.; Sung, S.-H.; Jung, H.-J. Experimental Validation of Normalized Uniform Load Surface Curvature Method for Damage Localization. Sensors 2015, 15, 26315-26330.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top