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http://dx.doi.org/10.7846/JKOSMEE.2016.19.3.194

Topology Optimization Application for Initial Platform Design of 10 MW Grade Floating Type Wave-wind Hybrid Power Generation System  

Song, Chang Yong (Department of Naval Architecture & Ocean Engineering, Mokpo National University)
Lee, Kangsu (Offshore Plant Research Division, Korea Research Institute of Ships & Ocean Engineering)
Hong, Keyyong (Offshore Plant Research Division, Korea Research Institute of Ships & Ocean Engineering)
Publication Information
Journal of the Korean Society for Marine Environment & Energy / v.19, no.3, 2016 , pp. 194-202 More about this Journal
Abstract
This study aims to review a topology optimization based on finite element analysis (FEA) for conceptual design of platform in the 10MW class floating type wave-wind hybrid power generation system (WHPGS). Two topology optimization theories, density method (DM) and homogenization design method (HDM) were used to check which one is more effective for a simplified structural design problem prior to the topology optimization of platform of WHPGS. From the results of the simplified design problem, the HDM was applied to the topology optimization of platform of WHPGS. For the conceptual platform design of WHPGS, FEA model was created and then the structural analysis was performed considering offshore environmental loads at installation site. Hydrodynamics analysis was carried out to calculate pressure on platform and tension forces in mooring lines induced from the offshore environmental loads such as design wave and current. Loading conditions for the structural analysis included the analysis results from the hydrodynamic analysis and the weights of WHPGS. Boundary condition was realized using inertia relief method. The topology optimization of WHPGS platform was performed using the HDM, and then the conceptual arrangement of main structural members was suggested. From the results, it was confirmed that the topology optimization might be a useful tool to design the conceptual arrangement of main structural members for a newly developed offshore structure such as the floating type WHPGS.
Keywords
Wave-wind hybrid power generation system; Topology optimization; Density method; Homogenization design method;
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