Accession Number : AD0690323

Title :   INFLUENCE OF DESIGN FEATURES ON UNDERWATER TOWED SYSTEM STABILITY,

Corporate Author : DEFENCE RESEARCH ESTABLISHMENT ATLANTIC DARTMOUTH (NOVA SCOTIA)

Personal Author(s) : Jeffrey,N. E.

Report Date : 08 JUL 1968

Pagination or Media Count : 10

Abstract : Development of faired cables has increased the feasible speed and depth of underwater towed systems, but a much more refined approach is now needed to obtain good dynamic stability with passively stabilized systems. Parametric analytical stability studies have demonstrated some fundamental effects of cable and body designs and their interactions on body behavior. These studies were based on a relatively simple mathematical model, which included approximate cable configuration parameters and body virtual masses and inertias. Results demonstrate the existence of a mode dominated by cable configuration, a mode dependent on cable-body coupling effects, a mode primarily affected by body design and three modes unlikely to be of practical importance. Relative effects of primary cable and body design features are shown in root-locus form, and conclusions are drawn concerning their significance to the over-all system. (Author)

Descriptors :   (*TOWED BODIES, TOWING CABLES), (*TOWING CABLES, STABILITY), MATHEMATICAL MODELS, TOWING CABLES, FAIRINGS, DRAG, DAMPING, EQUATIONS OF MOTION, OSCILLATION, UNDERWATER

Subject Categories : Marine Engineering
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE