FREDYN simulations in support of the Maritime Helicopter Project

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Authors
  1. McTaggart, K.A.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
This report describes simulations of ship motions in support of the Maritime Helicopter Project. The time domain program FREDYN has been used to simulate the HALIFAX class during coursekeeping and maneuvering. The coursekeeping simulations model the ship travelling in severe seas for a wide range of speeds and headings. The maneuvering simulations model the ship completing a 180 degree turn for a variety of ship speeds, headings, rudder angles, and sea states. Among all simulations, the highest roll angle was 32 degrees. For some cases with low ship speeds and waves, the ship was unable maintain course or complete its maneuver. Second order drift forces are very difficult to predict accurately; thus, the predictions of coursekeeping and maneuvering at low speed in higher sea states have a high degree of uncertainty.

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Keywords
Time domain;Computer programs (FREDYN)
Report Number
DREA-TM-2001-102 — Technical Memorandum
Date of publication
01 Aug 2001
Number of Pages
37
DSTKIM No
CA011764
CANDIS No
516375
Format(s):
Hardcopy;Document Image stored on Optical Disk

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