Fiber Reinforced Composite Power-Mooring Cables Design and Manufacturing applied to Wave Energy Converters Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/db78tf99d

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  • The design and analysis of single point power-mooring cables applied to wave energy converters (WECs) is presented. WECs are mechanical devices designed and deployed to extract energy from waves in varying ways, and at varying distances from the shoreline. WEC devices operating on the water surface require mooring lines or cables to anchor the device to the ocean floor. A mooring cable design process is suggested, and effects on cable properties of cable cross-sectional layout, material selection, and conductor design are investigated. The study focuses on cable design and structural material, however manufacturing and cable termination are also investigated to ensure production feasibility. Combinations of six cable configurations and four structural materials were studied for a total of 18 different designs. The structural materials used for the study, chosen for significant strength and fatigue properties, included Vectran HS, Kevlar 49, Carbon fibers in a vinyl ester matrix, and MP35N alloy. Copper was used as the conductor material in all cable configurations Structural component configuration had minimal impact on cable properties, while electrical component design, material used, and component helical angle exhibited significant effects on overall cable mechanical properties. Synthetic fiber designs exhibited more desirable cable mechanical properties and fatigue performance than carbon fibers in a vinyl ester matrix and MP35N alloy. Wave device heave motion and cable tension were not significantly affected by cable design or material. Cable termination requirements caused certain configurations to be impractical, while current cable manufacturing equipment, such as cabling, stranding, braiding, and extruding was found to be applicable to the proposed designs.
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