The present report covers the fluctuating characteristics of the shaft revolutions on CPP equipped ships in an astern movement. The ship's motion and the fluctuating characteristics of the shaft revolutions are calculated by solving the 2-dimensional equation of the ship's movement and the propeller shaft. Simulation tests of various designs are carried out after comparisons with the actual measurements were made. One of the attending problems is the rough estimate of the changing conditions of the CPP root strain at the time the blade angle is changed. To obtain the appropriate stopping abilities of CPP equipped ships, a comparison with that of the FPP equipped ships becomes important. To conduct quantitative studies on the major differences with CPP equipped ships, the authors divide the transient phenomena into five ranges and check each of them against the data obtained from actual ships. Following this, computed values relevant to the stopping tests of FPP equipped ships are obtained and compared with the actual trial results. Furthermore, this program was utilized in a simulation to study the factors which determine the propriety of the stopping abilities of FPP equipped ships.

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  • Corporate Authors:

    International Periodical Press

    193 Heemraadssingel
    Rotterdam,   Netherlands 
  • Authors:
    • OKAMOTO, H
    • TANAKA, A
    • Nozawa, K
    • SAITO, Y
  • Publication Date: 1974-3

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Filing Info

  • Accession Number: 00054871
  • Record Type: Publication
  • Source Agency: International Periodical Press
  • Files: TRIS
  • Created Date: Jul 15 1974 12:00AM