TESTING SHIP MODELS ON LONGITUDINAL SHIP MOTIONS BY TRANSIENT RESPONSE METHOD-PART 3 COUPLED MOTION

In the previous papers, the authors applied the transient response method to Pure Heave and Pure Pitch, and the practical effectiveness of this method for ship research was shown. In this paper, the results of the coupled forced oscillation test and the wave exciting forces test under the pure heave or pure pitch free condition are discussed in detail, comparing the experimental values with the calculated ones by Ordinary Strip Method (O.S.M.). The good correlation between the theory and the experiment is obtained with respect to the hydrodynamical forces and the coupling coefficients in frequency domain. Then, the discussion in time domain is given to the problem of prediction of the ship motion and the hydrodynamical force for the coupled forced oscillation test. The predicted time histories by O.S.M. coincide exactly with the measured phenomena. The following conclusions can be deduced from these studies. 1) The transient response method as an analytical technique is a useful method for study of ship motions. 2) The coupled forced oscillation test is of less importance. 3) The calculation by O.S.M. yields a successful estimation for practical use.

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  • Corporate Authors:

    Society of Naval Architects of Japan

    15-16, Toranomon, 1-chome, Minato-ku
    Tokyo,   Japan 

    Society of Naval Architects of Japan

    15-16, Toranomon, 1-chome, Minato-ku
    Tokyo,   Japan 
  • Authors:
    • Takezawa, S
    • Takekawa, M
  • Publication Date: 1973

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  • Accession Number: 00323711
  • Record Type: Publication
  • Source Agency: Stevens Institute of Technology
  • Files: TRIS
  • Created Date: May 21 1981 12:00AM