2011 Ultra-Deepwater

Vortex Induced Vibration Study for Deep Draft Column Stabilized Floaters

Subcontractor: Houston Offshore Engineering

Principal Investigator: Arun Antony
Project Number Project Status
11121-5404-03 Active
RPSEA Project Manager: Rick Baker
Participants
MARIN; Los Alamos National Laboratory; John Halkyard & Associates; Red Wing Engineering
Period of Performance
Start Date End Date
December 4, 2013 September 30, 2016
Total Project Cost RPSEA Share Cost Share
$2,673,692.00 $2,138,100.00 $535,592.00
Project Objectives

A vortex induced motion (VIM) study to determine the sensitivity of the VIM response to the geometric parameters of deep draft semisubmersibles,  computational fluid dynamics (CFD) analysis to understand semi-submersibles’ VIM and sensitivity to various parameters by studying the fluid flow (i.e., vortex shedding and wake interface) and VIM response to be used in the development of guidelines; and a model test to validate the VIM performance of one benchmark semi hull configuration and several variations in VIM mitigation options in a towing tank, with and without suppression devices. The research will be conducted in two phases:

  • The VIM study and CFD analysis will be conducted for an ultra-deepwater dual column dry tree concept and a second deep draft concept developed by Aker (DTS Floating System), both of which are undergoing further evaluation for suitability in RPSEA Project 10121-4404-02). The study may result in changes to VIM suppression strake designs, column geometry modifications, and/or active flow control systems. A systematic CFD analysis will be carried out to study and improve the VIM performance of sixteen (16) semisubmersible designs, based on two hull types (paired column and conventional), with eight variations in column and node configuration (shape, spacing, and orientation) (TRL1).
  • The model test will result in VIM suppression devices or hull geometric optimization recommendations with due consideration to the platform global performance and constructability (TRL2).

This work will complement the 10121-4405-02 research and will, by virtue of determination of the strengths and weaknesses of the paired column and the conventional semi systems, contribute to the decision to down-select a concept.

 

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RPSEA Project Fact Sheet: Download 256.9 KB
Reports
File Type Date
Vortex Induced Motion Study for Deep Draft Column Stabilized Floaters ( 23.2 MB ) VIM Model Test Report Vol. 2, App H Part 2 04/16
Vortex Induced Motion Study for Deep Draft Column Stabilized Floaters ( 21.8 MB ) VIM Model Test Report Vol. 2, App H Part 1 04/16
Vortex Induced Motion Study for Deep Draft Column Stabilized Floaters ( 14.1 MB ) VIM Model Test Report Vol. 2, App G10 04/16
Vortex Induced Motion Study for Deep Draft Column Stabilized Floaters ( 11.6 MB ) VIM Model Test Report Vol. 2, App G9 04/16
Vortex Induced Motion Study for Deep Draft Column Stabilized Floaters ( 11.9 MB ) VIM Model Test Report Vol. 2, App G8 04/16
Vortex Induced Motion Study for Deep Draft Column Stabilized Floaters ( 12.1 MB ) VIM Model Test Report Vol. 2, App G7 04/16
Vortex Induced Motion Study for Deep Draft Column Stabilized Floaters ( 11.5 MB ) VIM Model Test Report Vol. 2, App G6 04/16
Vortex Induced Motion Study for Deep Draft Column Stabilized Floaters ( 11.3 MB ) VIM Model Test Report Vol. 2, App G5 04/16
Vortex Induced Motion Study for Deep Draft Column Stabilized Floaters ( 12.1 MB ) VIM Model Test Report Vol. 2, App G4 04/16
Vortex Induced Motion Study for Deep Draft Column Stabilized Floaters ( 12.6 MB ) VIM Model Test Report Vol. 2, App G3 04/16
Vortex Induced Motion Study for Deep Draft Column Stabilized Floaters ( 11.7 MB ) VIM Model Test Report Vol. 2, App G2 04/16
Vortex Induced Motion Study for Deep Draft Column Stabilized Floaters ( 11.9 MB ) VIM Model Test Report Vol. 2, App G1 04/16
Vortex Induced Motion Study for Deep Draft Column Stabilized Floaters ( 2.1 MB ) VIM Model Test Report Vol. 2 04/16
Vortex Induced Motion Study for Deep Draft Column Stabilized Floaters ( 6.2 MB ) Phase 1 Final Report 06/15
Presentations
Title: Paper Presentation: Model Test Investigation of the Influence of Damping on the Vortex Induced Motions of Deep Draft Semi-Submersibles Using a Novel Active Damping Device - 06/16 ( 317.5 KB )
Title: PHASE 1 FINAL PRESENTATION: Vortex Induced Motion Study for Deep Draft Column Stabilized Floaters - 04/15 ( 2.1 MB )
Articles
Title: CFD For VIM Estimation Of Semisubmersibles - 07/15
URL : http://www.epmag.com/cfd-vim-estimation-semisubmersibles-804426
Download ( 296.4 KB )
Pictures
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