MODEL TESTS ON THE PERFORMANCE OF AN ANTI-ROLLING TANK (FOR THE TSUSHIMA) IN IRREGULAR SEAS

During the design of a 70-m navigation-aid research ship (the Tsushima, built by Mitsui for the Japanese Maritime Safety Agency), performance tests for her anti-roll tank were conducted on a 1:28-scale self-propelled model of the ship in the seakeeping basin at Tokyo University. The Authors describe these tests and present the results. The paper inlcudes inter alia a diagrammatic sketch of the experimental installation used in the basin. The model was subjected to irregular waves with simulated ITTC spectra for wind-speeds of 10 and 15 m/sec., and its motions were recorded. Spectral analysis and amplitude collation were carried out. From the analysed data, the effectiveness of the tank was evaluated by a formula presented in the paper. The results show that the tank was not effective in head seas, was slightly effective in beam seas, and was considerably effective in following oblique seas. The maximum effectiveness was about 50% which appeared to be satisfactory. Order from: BSRA No. 48,565.

  • Availability:
  • Corporate Authors:

    Kansai Zosen Kyokai, Osaka University

    Aza-yamadaue, Suitashi
    Osaka,   Japan 
  • Authors:
    • Motora, S
    • Ueda, K
  • Publication Date: 1977-12

Language

  • Japanese

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00179542
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Aug 27 1978 12:00AM