Analysis And Design Of Offshore Triceratops Under Ultra-Deep Waters

• Main Authors: Srinivasan Chandrasekaran, R. Nagavinothini
• Format: Text
• Language: English
• Published: Zenodo 2017
• Subjects: Buoyant legs; dynamic analysis; offshore structures; preliminary design; random waves; triceratops.; Arctic; Webb; Newfoundland
• Online Access: https://dx.doi.org/10.5281/zenodo.1132863; https://zenodo.org/record/1132863

Offshore platforms for ultra-deep waters are form-dominant by design; hybrid systems with large flexibility in horizontal plane and high rigidity in vertical plane are preferred due to functional complexities. Offshore triceratops is relatively a new-generation offshore platform, whose deck is partially isolated from the supporting buoyant legs by ball joints. They allow transfer of partial displacements of buoyant legs to the deck but restrain transfer of rotational response. Buoyant legs are in turn taut-moored to the sea bed using pre-tension tethers. Present study will discuss detailed dynamic analysis and preliminary design of the chosen geometric, which is necessary as a proof of validation for such design applications. A detailed numeric analysis of triceratops at 2400 m water depth under random waves is presented. Preliminary design confirms member-level design requirements under various modes of failure. 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