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http://dx.doi.org/10.12989/was.2015.21.6.657

Numerical evaluation for vibration-based damage detection in wind turbine tower structure  

Nguyen, Tuan-Cuong (Department of Ocean Engineering, Pukyong National University)
Huynh, Thanh-Canh (Department of Ocean Engineering, Pukyong National University)
Kim, Jeong-Tae (Department of Ocean Engineering, Pukyong National University)
Publication Information
Wind and Structures / v.21, no.6, 2015 , pp. 657-675 More about this Journal
Abstract
In this study, the feasibility of vibration-based damage detection methods for the wind turbine tower (WTT) structure is evaluated. First, a frequency-based damage detection (FBDD) is outlined. A damage-localization algorithm is visited to locate damage from changes in natural frequencies. Second, a mode-shape-based damage detection (MBDD) method is outlined. A damage index algorithm is utilized to localize damage from estimating changes in modal strain energies. Third, a finite element (FE) model based on a real WTT is established by using commercial software, Midas FEA. Several damage scenarios are numerically simulated in the FE model of the WTT. Finally, both FBDD and MBDD methods are employed to identify the damage scenarios simulated in the WTT. Damage regions are chosen close to the bolt connection of WTT segments; from there, the stiffness of damage elements are reduced.
Keywords
frequency-based damage detection; mode-shape-based damage detection; wind turbine tower structure; Midas FEA;
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