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Yun, Chung Bang
Structural Dynamics Lab
Research Interests
  • Structural dynamics
  • Stochastic mechanics and structural reliability
  • Smart sensors for structural health monitoring
  • System identification and damage diagnosis
  • Offshore, earthquake, and wind engineering
  • Soil-structure and fluid-structure interactions

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Electromechanical impedance-based long-term SHM for jacket-type tidal current power plant structure

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Title
Electromechanical impedance-based long-term SHM for jacket-type tidal current power plant structure
Author
Min, JiyoungYi, Jin-HakYun, Chung Bang
Issue Date
2015-02
Publisher
TECHNO-PRESS
Citation
SMART STRUCTURES AND SYSTEMS, v.15, no.2, pp.283 - 297
Abstract
Jacket-type offshore structures are always exposed to severe environmental conditions such as salt, high speed of current, wave, and wind compared with other onshore structures. In spite of the importance of maintaining the structural integrity for an offshore structure, there are few cases to apply a structural health monitoring (SHM) system in practice. The impedance-based SHM is a kind of local SHM techniques and to date, numerous techniques and algorithms have been proposed for local SHM of real-scale structures. However, it still requires a significant challenge for practical applications to compensate unknown environmental effects and to extract only damage features from impedance signals. In this study, the impedance-based SHM was carried out on a 1/20-scaled model of an Uldolmok current power plant structure in Korea under changes in temperature and transverse loadings. Principal component analysis (PCA)-based approach was applied with a conventional damage index to eliminate environmental changes by removing principal components sensitive to them. Experimental results showed that the proposed approach is an effective tool for long-term SHM under significant environmental changes
URI
https://scholarworks.unist.ac.kr/handle/201301/10904
URL
http://ocean.kisti.re.kr/IS_mvpopo001P.do?method=multMain&cn1=JAKO201507158234620&poid=tp&free=
DOI
10.12989/sss.2015.15.2.283
ISSN
1738-1584
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