WIND EFFECTS ON SHIP CAPSIZE RISK

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Authors
  1. McTaggart, K.A.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
The technical memorandum examines the wind model used in the ship motion code FREDYN and give a method for predicting capsize risk in waves and wind. Future improvements to FREDYN should include the influence of ship speed on relative wind and a new model for variation of wind forces with heel angle. For a ship in irregular seas, the occurrence of capsize is shown to be very sensitive to the phases of wave components. Consequently, several different combinations of wave phases should be used for evaluating capsize risk in irregular seas. A frigate case study illustrates the influence of wind collinear with waves on capsize risk. The presence of wind causes capsize risk to be more evenly distributed across headings than when wind effects are neglected. In general, wind effects are significant and should be included in future capsize studies.
Keywords
Time domain
Report Number
DREA-TM-95-204 — Technical Memorandum
Date of publication
01 Feb 1995
Number of Pages
89
DSTKIM No
95-01481
CANDIS No
150817
Format(s):
Hardcopy;Document Image stored on Optical Disk

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