Publicações

Tello, M., Bhattacharjee, J. e Guedes Soares, C. (2012), “Dynamics and hydrodynamics of a ship like Wave Energy Converters in roll”, Maritime Engineering and Technology, C. Guedes Soares, Y. Garbatov, S. Sutulo, T.A. Santos, (Eds.), Taylor and Francis Group, pp. 655-666

The hydrodynamic and dynamic performance of a wave energy device designed to convert ocean wave energy by roll motion is analysed. To perform the study, the coastal zone of Leixões, Portugal, is chosen as the installation site; the main hull characteristics are designed aiming to match the predominant wave period of the operational zone. Frequency domain transfer functions are obtained, viscous roll damping corrections are introduced, and the power take off influence is also taken into account. Moreover, analysis based on irregular seas is made aiming to estimate the responses in a real sea state. The results show that the designed geometrical shapes guaranties amplitudes in roll higher than 3? for the most common zero crossing period and the observed significant wave height. Further, a static analysis of the mooring system reveals that less heavy materials for the mooring line reduces the vertical loads on the fairlead and the anchor point. In addition, subsurface floaters may be added to the mooring system in order to further reduce the load, especially the vertical load at the fairlead.

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