NDLI: Dry and Wet Tree Damper Chamber Column Semisubmersible Design in Harsh Environment

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Alaa, M. Mansour Upston, Laurence Wan, Yaming
Copyright Year	2011
Abstract	The Damper Chamber Column Semi is a new semisubmersible conceptual design that is developed to provide a cost effective solution that can be used in deepwater dry or wet tree applications. The new semisubmersible design resembles the conventional design with a ring pontoon. However, in the new design, the columns have been configured with free flooding inner damper chambers; hence the name Damper Chamber Column Semi (DCC Semi). At quayside and during wet tow, the column configurations provide large water plane area for stability purposes, while for the in service conditions the inner chambers are flooded and the trapped water provides considerable amount of “free” added mass that significantly reduces the semisubmersible motion response. In this paper the performance of the DCC Semi located in Gulf of Mexico (GoM) environment has been simulated using fully coupled time domain analysis. Numerical results are presented for the platform motion and the tensioner stroke to demonstrate the platform performance feasibility. Structural design is performed to confirm the steel weight and establish the column connection details of the new design. The paper also presents the topside to hull quayside integration approach for this case study.
Sponsorship	Ocean, Offshore and Arctic Engineering Division
Starting Page	515
Ending Page	521
Page Count	7
File Format	PDF
ISBN	9780791844335
DOI	10.1115/OMAE2011-49729
Volume Number	Volume 1: Offshore Technology; Polar and Arctic Sciences and Technology
Conference Proceedings	ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering
Language	English
Publisher Date	2011-06-19
Publisher Place	Rotterdam, The Netherlands
Access Restriction	Subscribed
Subject Keyword	Dry tree unit Quayside integration Damper chamber column Semisubmersibe Top tensioned risers Dampers Design Semi-submersible offshore structures
Content Type	Text
Resource Type	Article

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