Write your message
Volume 11, Issue 21 (9-2015)                   Marine Engineering 2015, 11(21): 41-56 | Back to browse issues page

XML Persian Abstract Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Jamalkia A, Ettefagh M M, Mojtahedi A. Damage Identification of the Floating Wind Turbine Mooring Line by Fuzzy Classification . Marine Engineering 2015; 11 (21) :41-56
URL: http://marine-eng.ir/article-1-352-en.html
1- University of Tabriz
Abstract:   (6342 Views)

Structural health monitoring is essential for ensuring the structural safety performance during the service life. The process is of paramount importance in case of the floating wind turbine due to the structural parts subjected to the marine environmental risky conditions. In this paper a fuzzy-based damage identification method using dynamic response of the Spar floating wind turbine has been proposed. In the first step, the nonlinear equations of motion of the floating wind turbine system derived using the theorem of conservation of angular momentum and Newton’s second law. Then the variation values of the frequency characteristics of the structure in each DOFs due to stiffness changes of mooring lines (simulated damage) are considered as input features to the fuzzy system. Also the fuzzy system was trained based on calibrating of the membership functions by defining the damage classes properly. For validating the proposed method, noise with different SNRs was contaminated to the measured features and the success rate of the damage detection was calculated. The results showed that the proposed method is able to identify the damage classes with acceptable success rate.

Full-Text [PDF 1355 kb]   (3187 Downloads)    
Type of Study: Research Paper | Subject: Offshore Structure
Received: 2014/09/25 | Accepted: 2015/04/14

Send email to the article author


Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Creative Commons License
International Journal of Maritime Technology is licensed under a

Creative Commons Attribution-NonCommercial 4.0 International License.