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Wind and Structures
  Volume 18, Number 3, March 2014, pages 267-279

Hydrodynamic response of alternative floating substructures for spar-type offshore wind turbines
Baowei Wang, SajadRahmdel, Changwan Han, Seungbin Jung and Seonghun Park

    Hydrodynamic analyses of classic and truss spar platforms for floating offshore wind turbines (FOWTs) were performed in the frequency domain, by considering coupling effects of the structure and its mooring system. Based on the Morison equation and Diffraction theory, different wave loads over various frequency ranges and underlying hydrodynamic equations were calculated. Then, Response Amplitude Operators (RAOs) of 6 DOF motions were obtained through the coupled hydrodynamic frequency domain analysis of classic and truss spar-type FOWTs. Truss spar platform had better heave motion performance and less weight than classic spar, while the hydrostatic stability did not show much difference between the two spar platforms.
Key Words
    floating offshore wind turbines (FOWT); classic spar platform; truss spar platform; frequency domain; hydrostatic analysis; hydrodynamic analysis; finite element method
Baowei Wang, SajadRahmdel, Changwan Han, Seungbin Jung and Seonghun Park: School of Mechanical Engineering, Pusan National University, Busan, Republic of Korea

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