Research Information System
WECANet COST Action CA17105: A pan-European Network for Marine Renewable Energy with a Focus on Wave Energy, Ghent, Belgium, 6 - 07 March 2023, pp.56
The fixed-bottom hybrid systems OWT/WEC are subjected to environmental loads such as horizontal
cyclic loading due to wind and waves. These systems are exposed to earthquake loading and
environmental loading in seismic areas. However, the response of the hybrid wind-wave energy
converters under combined environmental and seismic loads has yet to be much studied in the
literature.
The proposed research will implement for the hybrid systems in the Aegean Sea, Turkey, which is an
active seismic area. It is comprising two main goals: (I) Investigating the potential offshore energy
sites around Turkish coastlines in the Aegean Sea using multi-criteria decision-making tools; (II)
Numerical analyses of hybrid wind-wave energy converters at two selected potential sites under
environmental and seismic loading. The 3D finite element method will be carried out for the
numerical analyses. Wavestar [1] point absorbers mounted around the monopile will be investigated
as hybrid offshore energy systems OWT/WEC within the scope of this study. A diameter of 𝐷 =
10 𝑚, a diameter-to-wall thickness ratio 𝐷⁄𝑡 = 100, and an embedded length of 𝐿 = 50 𝑚 will
consider for the numerical simulation of the monopile. The pile head deformation and rotation
accumulation and the excess pore water accumulation around the monopile will investigate under
seismic and environmental loadings.
This proposed study provides a site recommendation for OWT/WEC systems in the Aegean Sea,
Turkey. Within the framework of the numerical simulation study, the seismic response of largediameter
monopiles for hybrid offshore energy systems will assess.