AN INVESTIGATION INTO THE STABILISATION EFFECTS OF ANTI-ROLL TANKS WITH FLOW OBSTRUCTIONS

Previous research has studied the performance of anti-roll tanks in 'damping' the roll motion of the ship. Although certainly the greatest effect of introducing the anti-roll tank is to increase the roll damping, there is another important aspect which so far has been neglected, and that is the effect it has on the ship roll restoring moment characteristics and thus the natural frequency of roll motion. This paper elaborates on the above idea and presents a case study involving an actual application to a diving support vessel. The problem addressed was made more complicated, because the tanks pace was subdivided by non-water-tight longitudinal girders for reasons of structural strength. A detailed account of model bench tests is given and the method of analysing the experimental results discussed. Using the data obtained, suitable girder configurations are suggested and recommendations are made on the operation of such a device as well as on the general use of anti-roll tanks as detuning devices.

  • Supplemental Notes:
    • Intl Shipbuilding Progress, v 43 n 433, April 1996, p 70 [17 p, 4 ref, 14 fig]
  • Authors:
    • Lee, B S
    • Vassaols, D
  • Publication Date: 1996

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00728008
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Nov 4 1996 12:00AM