THE INTERACTION DYNAMICS OF A SEMI-SUBMERSIBLE TOWING A LARGE TOWFISH

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Authors
  1. Seto, M.L.
  2. Watt, G.D.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
The interactions between a semi-submersible drone and its large towfish, where the tension in the tow calbe joining them is about 20% of the weight of the drone, are investigated. Since standard cable dynamics modelling computer programs do not model tow-vehicle/tow-body interactions, an iterative approach to calculating these interactions is developed. Drone motions are modelled with a non-linear, six degree-of-freedom, underwater vehicle simulation incorporating pre-defined, three component, time dependent tow cable tensions applied at the tow point. Cable dynamics are modelled with the non-linear, finite segment, cable/towfish dynamic simulator DYNTOCABS, which accepts pre-defined tow-point accelerations as time varying boundary conditions. The interactions are calculated by iterating between these two programs. The method is applied to simple turning maneuvers important to minehunting operations.
Keywords
Towfish;Interactions
Date of publication
01 May 1998
Number of Pages
8
Reprinted from
International Society of Offshore and Polar Engineers, vol II, 1998, p 263-270
DSTKIM No
98-01452
CANDIS No
508292
Format(s):
Hardcopy;Document Image stored on Optical Disk

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