SPAR Platforms: Technology and Analysis Methods by Edited by Moo-Hyun Kim

By Edited by Moo-Hyun Kim

The layout, research, and use of spar systems for offshore oil construction is tested completely during this new ebook. This quantity surveys the background of spar improvement and offers specified layout modeling features of spar hull, mooring, and anchoring platforms. Ocean and coastal engineers, these excited about the layout and development of offshore constructions, and petroleum engineers will locate the publication an invaluable complement to present necessities for spar structures

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The critical load cases will be the focus for the early stages of the mooring system design. Specifically, those cases in this category considered to be governing (for example, the 100-year design extreme environment and the 1000-year survival environment) need to be covered in the mooring sizing stage to define the mooring system design. The remaining critical cases can be covered in the preliminary mooring design to confirm the system design. The mooring system design is not considered to be confirmed in principal without completing the analysis for the non-transparent load cases.

Often some of the load cases may be equally critical, if not governing, based on the analysis results. These should be regrouped into the critical load cases. Additionally, some of the load cases originally deemed critical may be down-graded. By the end of this mooring design cycle, the critical and non-critical load cases are regrouped and more clearly defined, and the number of non-transparent load cases is reduced to a small group. This progression of mooring analysis sharpens and maintains the design focus.

A tendon mooring system consists of a set of nominally vertically tensioned tendons used for mooring TLPs. 1 Fig. 2-1. Examples of floating offshore platforms 1 The turret-mooring used for the FPSO shown is a spread mooring type. 33 34 SPAR PLATFORMS Mooring System Tendon Systems Spread Mooring System Conventional Catenary Semi Taut-leg Catenary System Taut-Leg Catenary System Fig. 2-2. The types of mooring systems Spread mooring systems are generally catenary. The suspended vertical line profile of each of the mooring lines is of catenary shape, defined by the well-known catenary equations.

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