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Project Number 116
Date of Summary March 31, 1988
Subject Impact of Annual Ice with a Cable-Moored Platform
Performing Activity University of Iowa
Principal Investigator Dr. Robert Ettema
Contracting Agency Minerals Management Service
Estimated Completion Completed
Description This was a Joint Industry Project (JIP). The objective was to determine the ice loads and motions likely to be experienced by a cable-moored platform subject to a moving ice flow or field of ice rubble. Presently such data are scarce, although cable-moored platforms are being considered as work platforms in Arctic waters. The project evaluated the ice forces, moments, and platform motions resulting from ice impact. Parameters to be varied will be thickness, speed, and strength of the ice masses. A prototype model of the Gulf Canada platform `Kulluk` was used in a tank test to gather data to compare with actual field measurements taken from the `Kulluk.`
Progress Completed. The proprietary period on the reports has ended.

Reports
AA File in Adobe's Portable Document Format (PDF) . (6878 KB; 184 pages) Ettema, R., Stern, F., Lazaro, J., Dynamics of Continuous-Mode Icebreaking by a Polar-Class Icebreaking Hull, IIHR Report, Iowa Institute of Hydraulic Research, The University of Iowa, Iowa City, Iowa, April 1987.
AB File in Adobe's Portable Document Format (PDF) .(1182 KB; 126 pages) Ettema, R., Matsuishi, M., Ice Loads and Motions Experienced by a Floating Moored Platform in Mushy Ice Rubble, IIHR Report 295, The University of Iowa, Iowa City, Iowa, November 1985.
AC File in Adobe's Portable Document Format (PDF) . (4901 KB; 159 pages) Ettema, R., Matsuishi, M., The Dynamical Behavior of a Floating, Cable-Moored Platform Continuously Impacted by Ice Floes, IIHR Report 294, The University of Iowa, Iowa City, Iowa, November 1985.
AD Pilkington, G. R., Wright, B. D., Dixit, B. C., Woolner, K. S., O'Dell, B. D., A Review of Kulluk's Performance after Three Years Operations in the Beaufort Sea, Gulf Canada Corporation, Calgary, Alberta, Canada (Out of Print).
AE File in Adobe's Portable Document Format (PDF) . (2091 KB; 80 pages) Nixon, W. A., Ettema, R., Ice-Sheet Interaction with a Cable- Moored Platform, Iowa Institute of Hydraulic Research, The University of Iowa, Iowa City, Iowa, December 1987.
AF File in Adobe's Portable Document Format (PDF) . (1437 KB; 56 pages) Nixon, W. A., Ettema, R., Ice Rubble Impact with a Moored Platform, Iowa Institute of Hydraulic Research, The University of Iowa, Iowa City, Iowa, January 1988 (Draft).
AG Nixon, W. A., Ettema, R., Ice Rubble Impact with a Moored Platform, Report No. 147, Iowa Institute of Hydraulic Research, The University of Iowa, Iowa City, Iowa, April 1988 (Out of Print).

 

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