Accession Number : ADA140317

Title :   A Study of Extreme Waves and Their Effects on Ship Structure.

Descriptive Note : Final rept.,


Personal Author(s) : Buckley,W H

PDF Url : ADA140317

Report Date : Jan 1983

Pagination or Media Count : 93

Abstract : Previous studies have indicated that certain extremely large waves, measured during Hurricane Camille, might be characterized as non-Gaussian. Waves of similar time-domain description had previously been found to cause ship damages during winter storms. Interviews with ship masters and officers furnished additional important characterizations of these waves, as well as indications of the synoptic weather conditions which were involved. A survey of heavy-weather damage information from Coast Guard records was conducted to evaluate general trends of heavyweather damage to ships. A preponderance of damage is attributed to local wave loadings. Selected cases of ship damage and severe hull girder stressing were examined in relation to the types of extreme waves reported to have been encountered, or believed to have been encountered, based in part upon prevailing synoptic weather conditions. A tentative characterization of large non-Gaussian waves is provided. Recent developments in nonlinear wave mechanics are reviewed to help explain the origin and propagation of these waves. Current studies of the synoptic development of winter storms are examined to identify wind field characteristics which appear to be related to the development of 'rogue' waves.

Descriptors :   *Ocean waves, *Ship structural components, Damage, Statistical distributions, Impact, Loads(Forces), Range(Extremes), Height, Nonlinear systems, Random variables, Girders, Ship hulls, Time series analysis, Threat evaluation, Marine meteorology, Oceanographic data, Statistical analysis, Storms, Hurricanes, Winter, Synoptic meteorology, Coast Guard

Subject Categories : Meteorology
      Physical and Dynamic Oceanography
      Statistics and Probability
      Marine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE