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发表于 2011-4-28 11:05
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来自： 中国上海
The Extendable Draft Platform (EDP) is a deep-draft semisubmersible concept characterized by columns sliding through openings in a buoyant barge-type deck that supports the complete structure before setup at operating site. The EDP design and a conventional semi-submersible design with slightly increased draft are compared and the comparison demonstrates that the EDP design is superior in motion performance while maintaining a high hull efficiency comparable to that of conventional semisubmersibles. In addition to better motion performance, the new EDP design is shown to offer other advantages compared with other deep draft floater concepts, such as low level dockside hull & deck integration, self-installation, flexible fabrication and delivery schemes, and reversible installation procedure permitting easy re-use.
Benefits of the EDP’s reduced motions to the riser system are also investigated. The EDP is shown to provide a cost-effective and reliable way to support top-tensioned risers (TTRs) and steel catenary risers (SCRs) for deepwater applications. Furthermore, the EDP’s low motions minimize SCR wave induced fatigue in comparison with a traditional semisubmersible of similar payload. |
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