General information
One of the important mean environmental loads on offshore structures are the wind loads. In high wind conditions the wind loads on the floater can be significant. In practice wind is not constant, but can vary both in velocity and direction. Wind spectra are often used to represent stationary wind conditions, while other conditions can be represented using a time record of the particular event (e.g. squall conditions).
One of the important mean environmental loads on offshore structures are the wind loads. In high wind conditions the wind loads on the floater can be significant. In practice wind is not constant, but can vary both in velocity and direction. Wind spectra are often used to represent stationary wind conditions, while other conditions can be represented using a time record of the particular event (e.g. squall conditions).
Services & Activities
The Offshore Department has a lot of expertise in the field of wind loads on FPSOs, Semi-submersibles and Spars. Wind loads can be modeled in one of MARIN's basins, either by generating actual wind (using wind fans) or by applying a calibrated load to the model (using a wire attached to a winch or a weight). The wind loads are usually calibrated based on available wind load coefficients, e.g. from wind tunnel tests. Alternatively, the wind loads can be determined through calculations by using either a data base wind load coefficients (using measurement results for similar vessels), semi-empirical methods (building block approach, e.g. WINDOS) or CFD calculations with e.g. our in-house viscous-flow solver ReFRESCO.
The Offshore Department has a lot of expertise in the field of wind loads on FPSOs, Semi-submersibles and Spars. Wind loads can be modeled in one of MARIN's basins, either by generating actual wind (using wind fans) or by applying a calibrated load to the model (using a wire attached to a winch or a weight). The wind loads are usually calibrated based on available wind load coefficients, e.g. from wind tunnel tests. Alternatively, the wind loads can be determined through calculations by using either a data base wind load coefficients (using measurement results for similar vessels), semi-empirical methods (building block approach, e.g. WINDOS) or CFD calculations with e.g. our in-house viscous-flow solver ReFRESCO.
Facilities & Tools
Wind loads are modelled in model tests carried out in the following MARIN facilities :
Wind loads are modelled in model tests carried out in the following MARIN facilities :
The following tools are used to study wind loads:
TERMSIM: Assessment of dynamic line and fender loads for moored tankers
DYNFLOAT: Assessment of dynamic mooring system loads and tanker motions
WINDOS: Assessment of wind loads on ships and offshore structures
DBSHIP: Assessment of mean wave, wind and current forces on ships
DPCAP: Analysis of thruster capacity in dynamic positioning
DPSIM: Low frequency motion simulation of moored and DP vessels
ReFRESCO: Versatile CFD tool for marine hydrodynamics
DYNFLOAT: Assessment of dynamic mooring system loads and tanker motions
WINDOS: Assessment of wind loads on ships and offshore structures
DBSHIP: Assessment of mean wave, wind and current forces on ships
DPCAP: Analysis of thruster capacity in dynamic positioning
DPSIM: Low frequency motion simulation of moored and DP vessels
ReFRESCO: Versatile CFD tool for marine hydrodynamics
Software Sales
Some software tools are available for commercial use outside MARIN. A complete overview of these software tools for sale can be found under Software Sales.
Some software tools are available for commercial use outside MARIN. A complete overview of these software tools for sale can be found under Software Sales.
Experience
The list below gives a review of projects carried out at MARIN in which special attention was paid to the modelling of wind loads:
The list below gives a review of projects carried out at MARIN in which special attention was paid to the modelling of wind loads:
- Okume TLP and Tender Assisted Drilling (TAD) vessel tests (2006)
- Atlantis semi-submersible (GVA / BP, 2002)
- FPSO and shuttle tanker wind load measurements (Offloading Operatbility JIP, 2001)
- Saipem 10000 drilling vessel (Saipem / Samsung, 1998)
Most recent papers on wind loads presented by MARIN
(complete overview of papers can be found under Publications)
(complete overview of papers can be found under Publications)
Predicting Wind Loads For FPSO Tandem Offloading Using CFD
Koop, A.H., Klaij, C.M. and Vaz, G.N.V.B., OMAE Conference, Shanghai, 2010
Motions and Mooring Loads of an LNG-Carrier Moored at a Jetty in a Complex Bathymetry
Otto Weiler (Deltares), Hans Cozijn (MARIN), Bas Wijdeven (Deltares), Stephane Le-Guennec (Total) and Francois Fontaliran (Yemen, OMAE Conference, Honolulu, 2009
Time Domain Analysis for DP Simulations
Jorrit-Jan Serraris (MARIN), OMAE Conference, Honolulu, 2009
On the power savings by an auxiliary kite propulsion
Naaijen, P., Koster, V. and Dallinga, R.P., International Shipbuilding Progress, 2006
Advanced and future hydrodynamic optimisation tools in sail yacht design
Ridder de E.J. and Gaillarde G., MDY Madrid Design Yacht 06, 2006
Koop, A.H., Klaij, C.M. and Vaz, G.N.V.B., OMAE Conference, Shanghai, 2010
Motions and Mooring Loads of an LNG-Carrier Moored at a Jetty in a Complex Bathymetry
Otto Weiler (Deltares), Hans Cozijn (MARIN), Bas Wijdeven (Deltares), Stephane Le-Guennec (Total) and Francois Fontaliran (Yemen, OMAE Conference, Honolulu, 2009
Time Domain Analysis for DP Simulations
Jorrit-Jan Serraris (MARIN), OMAE Conference, Honolulu, 2009
On the power savings by an auxiliary kite propulsion
Naaijen, P., Koster, V. and Dallinga, R.P., International Shipbuilding Progress, 2006
Advanced and future hydrodynamic optimisation tools in sail yacht design
Ridder de E.J. and Gaillarde G., MDY Madrid Design Yacht 06, 2006
Most recent articles on wind loads written for MARIN Report
(complete overview of articles can be found under Publications)
(complete overview of articles can be found under Publications)
Determining wind loads with CFD
Arjen Koop, MARIN Report, 2011
CFD for offshore applications
Arjan Koop & Guilherme Vaz, MARIN report, 2010
Tandem offloading of LNG by means of DP
Jorrit-JanSerraris, MARIN report, 2010
Measuring success
MARIN Report, 2009
Oasis of the Seas
Giedo Loeff, Jaap van Heerd & Reint Dallinga, MARIN report, 2009
Arjen Koop, MARIN Report, 2011
CFD for offshore applications
Arjan Koop & Guilherme Vaz, MARIN report, 2010
Tandem offloading of LNG by means of DP
Jorrit-JanSerraris, MARIN report, 2010
Measuring success
MARIN Report, 2009
Oasis of the Seas
Giedo Loeff, Jaap van Heerd & Reint Dallinga, MARIN report, 2009
Contact
For more information on how MARIN can help your organisation with wind loads, please contact the Offshore Department, the Manoeuvring Department, the Seakeeping Department or MSCN for nautical training.
For more information on how MARIN can help your organisation with wind loads, please contact the Offshore Department, the Manoeuvring Department, the Seakeeping Department or MSCN for nautical training.