FURTHER DEVELOPMENT OF A PROCEDURE FOR DETERMINATION OF WAVE RESISTANCE FROM LONGITUDINAL-CUT SURFACE PROFILE MEASUREMENTS

The single-longitudinal-cut method of Moran and Landweber is refined both in the experimental techniques and the analytical procedures. Analytically, a method combining iteration and elimination is used, instead of matrix inversion, to solve the linear equation for the amplitude spectrum; the upper truncation point XT is held constant in the analysis of wave data; and the modified procedures are applied both to the symmetical source distribution used by Moran as well as to an asymmetical one. Similar results were obtained with the latter distribution. Experimentally, it was found that the results obtained with the single-longitudinal-cut procedure were sensitive to the lateral position of the cut. Consequently, a multiple-longitudinal-cut technique was developed, using three probes in parallel, with the data analyzed by the method of least squares. Applying the multiple-longitudinal cut method to a family of four Series 60 models, consistent results among the 0.60 block models were obtained. Furthermore, the wave resistance was found to be essentially constant with respect to wave-record length for the 0.60 block geosims.

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  • Corporate Authors:

    Society of Naval Architects and Marine Engineers

    601 Pavonia Avenue
    Jersey City, NJ  USA  07306-2907
  • Authors:
    • Tsai, C E
    • Landweber, L
  • Publication Date: 1975-6

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Filing Info

  • Accession Number: 00098508
  • Record Type: Publication
  • Source Agency: Society of Naval Architects and Marine Engineers
  • Files: TRIS
  • Created Date: Aug 13 1975 12:00AM