SHIP ROLLING AT ZERO SPEED IN RANDOM BEAM SEAS WITH NONLINEAR DAMPING AND RESTORATION

A theoretical method is developed for estimating the root-mean-square of nonlinear roll for surface ships at zero speed under the influence of random beam seas. The nonlinearities considered include both "square'law" damping and a "Duffing-type" stiffness. An explicit relationship is derived for the rms nonlinear roll in terms of the linear roll variance and the ratios of nonlinear to linear damping and restoration coefficients. The method is illustrated by two examples stemming from earlier studies of similar problems.

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  • Corporate Authors:

    Society of Naval Architects and Marine Engineers

    601 Pavonia Avenue
    Jersey City, NJ  USA  07306-2907
  • Authors:
    • Vassilopoulis, L
  • Publication Date: 1971-12

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Filing Info

  • Accession Number: 00034691
  • Record Type: Publication
  • Source Agency: Society of Naval Architects and Marine Engineers
  • Files: TRIS
  • Created Date: Sep 29 1972 12:00AM