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http://dx.doi.org/10.9765/KSCOE.2013.25.4.236

Fragility Assessment of Offshore Wind Turbine by Ship Collision  

Cho, Byung Il (Dep. of Ocean Science and Engineering, Kunsan National University)
Kim, Dong Hyawn (Dep. of Ocean Science and Engineering, Kunsan National University)
Publication Information
Journal of Korean Society of Coastal and Ocean Engineers / v.25, no.4, 2013 , pp. 236-243 More about this Journal
Abstract
Offshore wind turbines has to be proved against accidental events such as ship collision. In this study, ship collision fragility analysis of offshore wind turbine is done. Dynamic collision analysis is accomplished by considering soil foundation interaction and fluid structure interaction. Uncertainties due to ship weight and speed, angle are also considered. By analyzing dynamic response of offshore wind turbine, fragility curves are obtained for different damage levels. They can be used for restricting boat speed around the wind turbine and allowable size of the boat for inspection and for other purposes. Results of the fragility, it was confirmed fragility of collision speed of bulk ship of 30,000DWT and 850ton barge ship.
Keywords
offshore wind turbine; mono-pile type support structure; p-y curve; hydrodynamic added mass; ship collision; collision fragility;
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