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TECHNICAL PAPERS

Physical Model Experiments to Assess the Hydrodynamic Interaction Between Floating Glacial Ice Masses and a Transiting Tanker

[+] Author and Article Information
R. Gagnon

Institute for Ocean Technology, National Research Council of Canada, St. John’s Newfoundland, A1B 3T5, Canada

J. Offshore Mech. Arct. Eng 126(4), 297-309 (Mar 07, 2005) (13 pages) doi:10.1115/1.1835986 History: Received May 01, 2003; Revised December 01, 2003; Online March 07, 2005
Copyright © 2004 by ASME
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References

Lever, J., Colbourne, B., and Mak, L., 1989, “Model Study of the Wave-Driven Impact of Ice Masses With a Semi-Submersible Platform,” Proceedings of the 8th International OMAE Conference, Vol. IV, pp. 393–403.
Isaacson,  M., and McTaggart,  K., 1990, “Influence of Hydrodynamic Effects on Iceberg Collisions,” Can. J. Civ. Eng., 17, pp. 329–337.
Arunachalam,  V. M., Murray,  J. J., and Muggeridge,  D. B., 1987, “Short Term Motion Analysis of Icebergs in Linear Waves.,” Cold Regions Sci. Technol., 13, pp. 247–258.
Farell,  C., 1971, “On the Flow About a Spheroid Near a Plane Wall,” J. Ship Res., 15, pp. 246–252.
Lewandowski,  E. M., 1992, “Hydrodynamic Forces and Motions of a Cylinder Near a Vertical Wall,” J. Ship Res., 36, pp. 248–254.
Foschi,  R., Isaacson,  M., Allyn,  N., and Yee,  S., 1996, “Combined Wave-Iceberg Loading on Offshore Structures,” Can. J. Civ. Eng., 23, pp. 1099–1110.
Grue,  J., 1986, “Time-Periodic Wave Loading on a Submerged Circular Cylinder in a Current,” J. Ship Res., 30, pp. 153–158.
Cumming, D., and Georghiou, A., 1999, “Physical Model Experiments to Assess the Hydrodynamic Interaction Between Iceberg Models and a Floating Structure—Phase 2,” IOT Report TR-1999-08.
Gagnon, R., 2001, “Analysis of Physical Model Experiments to Assess the Hydrodynamic Interaction Between Bergy Bits and a Transiting Tanker—Phase II,” IOT Report TR-2001-02.

Figures

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An illustration showing the three ice mass model shapes
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A close up view of the large spherical ice mass model with the top shell removed. The inner construction shows the ABS tubes with light-colored foam inserts that give the correct overall density when the sphere is flooded with water.
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A view of all three medium sized ice mass models with the large sphere in the background
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A photograph of a typical test using the small spherical ice mass model. The array of retro-reflective targets used by the video tracking system is visible on top of the model.
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Tanker model towing arrangement
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Ice mass model positioning system
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Sway and surge data from a typical test using the small pyramid-shaped ice mass with a model tanker track separation of 1.375 m and speed of 1.24 m/s. The tanker fore perpendicular position (FP) corresponds to the tanker model’s bow position along the tow tank axis relative to the initial position of the model ice mass along the tow tank axis.
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Maximum surge versus maximum sway data from tests using the spherical models, without waves
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Maximum surge versus maximum sway data from tests using the cylindrical models, without waves
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Maximum surge versus maximum sway data from tests using the pyramid models, without waves
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Maximum sway versus tanker speed (large sphere) for different ice mass/tanker track separations (D). Wave period (P) and height (H) are given for the tests in waves.
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Maximum sway versus tanker speed (medium sphere)
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Maximum sway versus tanker speed (small sphere)
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Maximum sway versus tanker speed (all spheres)
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Sway speed versus tanker speed (large sphere) for different ice mass/tanker track separations (D). Wave period (P) and height (H) are given for the tests in waves.
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Sway speed versus tanker speed (medium sphere)
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Sway speed versus tanker speed (small sphere)
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Sway speed versus tanker speed (all spheres)

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