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- W657432004 abstract "The OCEAN RANGER was drilling in the Hibernia Field off the coast of Newfoundland in February 1982 when struck by a severe storm that led to its capsize and the loss of all 84 crew members. As part of an investigation into the disaster the National Research Council of Canada (NRCC) undertook extensive model studies of the dynamic response and overturning of the rig in the wind and wave conditions that occurred during the disastrous storm. The paper describes modelling procedures, model control methods and measurement techniques. The main undertaking was the testing of a 1:40 scale hydrodynamic model in the NRCC 50m x 30m x 3m wave basin. To complete the modelling of the environmental loads, the mean and fluctuating components of the wind loads were measured in the NRCC 9m x 9m wind tunnel using a 1:100 scale model in a simulated atmospheric wind. Forces and moments were measured on all three axes for various combinations of vessel attitude, draft, wind direction and wave position. The combined, simultaneous effect of wind and waves was achieved by applying the measured mean and fluctuating wind forces to the hydrodynamic model by a high precision servomechanical control system through cables attached to the model. Computer-controlled motors were used to fluctuate the tension in each line to simulate the unsteady wind loads and to take account of the instantaneous attitude metacentric height, wind speed and direction, trim angle, and both regular and irregular waves." @default.
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- W657432004 date "1987-01-01" @default.
- W657432004 modified "2023-09-27" @default.
- W657432004 title "MODELLING OF DYNAMIC WIND LOADS IN WAVE BASIN TESTS OF THE SEMISUBMERSIBLE DRILLING PLATFORM OCEAN RANGER" @default.
- W657432004 hasPublicationYear "1987" @default.
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