Tetrahedral underwater arrays and the effect of current on their shape

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Authors
  1. Verrall, R.I.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
Underwater acoustic arrays shaped like tetrahedrons are possible candidates for rapidly deployable systems (RDS). They have aperture in all three physical dimensions, and therefore might be suitable for matched-field processing. This paper calculates the deformation of such an array in a current and compares this deformation to that of a simple vertical array. The paper derives the equations of the cable shape and presents the results of a number of numerical integrations. It appears that the tetrahedral shapes are not as stiff as one would infer from their triangular nature. The paper then points out very simple equations that will predict the cable shapes under quite common conditions. These back-of-the-envelope equations may well be a very useful design tool.
Keywords
Hydrophone arrays;Straightness;RDS (Rapidly Deployable Systems);Array shape;Array deployment
Report Number
DREA-TM-2000-093 — Technical Memorandum
Date of publication
01 Sep 2000
Number of Pages
32
DSTKIM No
CA010913
CANDIS No
515215
Format(s):
Hardcopy;Document Image stored on Optical Disk

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