STATISTICAL DISTRIBUTIONS OF HYDRODYNAMIC FORCES ON OBJECTS IN CURRENT AND WAVES

This paper deals with the various statistical distributions of Morison-type hydrodynamic forces when both waves and current are taken into consideration. The drag and inertia-coefficients are assumed to be constant in time. The initial distribution of the force is calculated in terms of a Whitaker-function series. This distribution is compared to various asymptotic expansions. For high values of the force the asymptotic expansion gives very good results, while for smaller values the correspondence is fair. The distribution of the local maxima of the force is calculated in terms of a conservative estimate. An asymptotic expansion of this estimate for high values of the force is found, and this shows excellent agreement with the values from numerical integration, even for smaller values of the force. At the end of the paper the calculation of the fractiles of the extreme-value distribution is discussed. The solution is given in tems of an asymptotic inverse power-series.

  • Corporate Authors:

    Selvigs Publishing A/S

    P.O. Box 9070 Vaterland, Christian Krohgs gt. 16
    Oslo 1,   Norway 
  • Authors:
    • Vinje, T
  • Publication Date: 1980

Media Info

  • Features: References;
  • Pagination: p. 20-26
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00323296
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 6 1981 12:00AM