Abstract

In this paper, a thorough damage detection study for tripod-type offshore wind turbine (OWT) structure is investigated. First, two damage locations are chosen based on the strength analysis results. Damages are simulated according to the likely damage patterns of each member. Modal strain energy (MSE) method and modal strain energy decomposition (MSED) method are applied for the damage detection procedure where the "measured" data are generated from a finite-element model while adding the simulated measurement noise. Both complete and incomplete measured modal data cases are considered during various damage scenarios. The numerical results suggest that damage members can be diagnosed exactly with complete modal data. When spatial incomplete modal data is available, the damage area can be identified.

Keywords:
offshore wind turbine structure, element 30, mse method, damage scenario, modal strain energy, offshore projects planning and execution, artificial intelligence, wind energy, damage indicator, damage detection
Subjects:
Offshore Facilities and Subsea Systems, Facilities and Construction Project Management, Platform design, Offshore projects planning and execution
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2014. International Society of Offshore and Polar Engineers
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