Accession Number : ADA131429

Title :   Prediction of Impact Pressure Induced by Breaking Waves on Marine Systems in Random Seas.

Descriptive Note : Rept. no. 2 (Final), Jan 81-May 83,


Personal Author(s) : Ochi,Michel K ; Tsai,Cheng-Han

PDF Url : ADA131429

Report Date : Jul 1983

Pagination or Media Count : 43

Abstract : This paper presents a method to statistically predict the magnitude of impact pressure (including extreme values) produced by deep water waves breaking on a circular cylinder representing a column of an ocean structure. Breaking waves defined here are not those whose tops are blown off by the wind but those whose breaking is associated with steepness. The probability density function of wave period associated with breaking waves is derived for a specified wave spectrum, and then converted to the probability density function of impact pressure. Impacts caused by two different breaking conditions are considered; one is the impact associated with waves breaking in close proximity to the column, the other is an impact caused by waves approaching the column after they have broken. As an example of the application of the present method, numerical computations are carried out for a wave spectrum obtained from measured data in the North Atlantic. (Author)

Descriptors :   *Ocean waves, *Impact, Offshore structures, Cylindrical bodies, Spectra, Dynamic pressure, Probability density functions, Measurement, Model tests, Hydraulic models

Subject Categories : Physical and Dynamic Oceanography
      Structural Engineering and Building Technology

Distribution Statement : APPROVED FOR PUBLIC RELEASE