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WindFloat: A floating foundation for offshore wind turbines
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10.1063/1.3435339
/content/aip/journal/jrse/2/3/10.1063/1.3435339
http://aip.metastore.ingenta.com/content/aip/journal/jrse/2/3/10.1063/1.3435339

Figures

Image of FIG. 1.
FIG. 1.

HyWind (spar), blue H (tension leg), SWAY (tension leg/spar), and WindSea (semisubmersible).

Image of FIG. 2.
FIG. 2.

Detail of structural reinforcement of water-entrapment plate on WindFloat.

Image of FIG. 3.
FIG. 3.

WindFloat hull and turbine.

Image of FIG. 4.
FIG. 4.

Turbine thrust vs wind speed.

Image of FIG. 5.
FIG. 5.

Turbine rated power vs wind speed.

Image of FIG. 6.
FIG. 6.

WindFloat location and metocean data buoy.

Image of FIG. 7.
FIG. 7.

Wetted hull of the WindFloat for the WAMIT model.

Image of FIG. 8.
FIG. 8.

Picture of the WindFloat model.

Image of FIG. 9.
FIG. 9.

WindFloat model in the 100 year storm.

Image of FIG. 10.
FIG. 10.

RAO in surge, heave, and pitch at 0° with and without wind.

Image of FIG. 11.
FIG. 11.

RAO in yaw at 90° without wind.

Image of FIG. 12.
FIG. 12.

WindFloat rotations in 4 m seas with 12 m/s wind.

Image of FIG. 13.
FIG. 13.

Tower base motion in 4 m seas with 12 m/s wind.

Image of FIG. 14.
FIG. 14.

Power outtake and blade pitch in 4 m seas with 12 m/s wind.

Image of FIG. 15.
FIG. 15.

Truss finite-element model.

Image of FIG. 16.
FIG. 16.

Maximum API design ratios on WindFloat platform in 90° heading sea state 1.

Image of FIG. 17.
FIG. 17.

Deformed (50×) shape of WindFloat structure in worst loading conditions (sea state 1 at 90° heading).

Image of FIG. 18.
FIG. 18.

Bending stress (kips/ft) and sway (ft) at the base of the tower at the largest wave of sea state 1.

Image of FIG. 19.
FIG. 19.

Sensitivity of bending stress with damping ratio in sea state 1 at 90° heading.

Image of FIG. 20.
FIG. 20.

Bending stress (kips/ft) and sway (ft) at the base of the tower at the largest wave of sea state 12.

Image of FIG. 21.
FIG. 21.

(Left) Axial force in compression. (right) Bending moment at largest event of sea state 1 at 90° heading.

Tables

Generic image for table
Table I.

WindFloat main dimensions.

Generic image for table
Table II.

5 MW turbine characteristics.

Generic image for table
Table III.

Operational metocean case.

Generic image for table
Table IV.

ECG.

Generic image for table
Table V.

100 year storm.

Generic image for table
Table VI.

Directional extreme events.

Generic image for table
Table VII.

Summary of stability characteristics.

Generic image for table
Table VIII.

Numerical and model test results in the 100 year storm with 0° wave heading and 25 m/s steady wind.

Generic image for table
Table IX.

Sea states for structural strength analysis.

Generic image for table
Table X.

Fatigue life on connection between bracings based on nominal wall thickness.

Generic image for table
Table XI.

Fatigue life with double wall thickness at the connection.

Generic image for table
Table XII.

Summary of sensitivity of fatigue damage on SCF.

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/content/aip/journal/jrse/2/3/10.1063/1.3435339
2010-06-15
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: WindFloat: A floating foundation for offshore wind turbines
http://aip.metastore.ingenta.com/content/aip/journal/jrse/2/3/10.1063/1.3435339
10.1063/1.3435339
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