NUMERICAL METHODS IN WATER-WAVE DIFFRACTION AND RADIATION

The subject of diffraction and radiation of water waves by natural boundaries or man-made structures is of considerable importance in ocean engineering. As a result of the rapid growth of ocean exploration and transportation, detailed knowledge of wave effects is now a virtual necessity for the safe design of costly projects such as tankers and their moorings, offshore terminals and drilling rigs, and other offshore structures. Predicting the responses to possible incident waves is essential for the safe and economical operation of existing and new harbors. The report defines two diffraction categories: waves that are of mixed small and large amplitude and wavelength, and waves of small amplitude and wavelength. In the latter condition, diffraction crucially affects the local wave pattern. The report develops numerical methods (for which extensive use of the computer is necessary) for this latter category, covering arbitrary geometries and frequencies of harmonic waves. The report begins with a mathematical formulation of the lineralized theory, and then concentrates on two major methods: the integral equation method, and the hybrid element method. In conclusion, the report discusses the respective merits of each and their technical application, and ends with a challenge to continue wave diffraction investigations to include transient or random waves.

  • Corporate Authors:

    Massachusetts Institute of Technology

    Sea Grant Program, 77 Massachusetts Avenue
    Cambridge, MA  United States  02139
  • Authors:
    • Mei, C C
  • Publication Date: 1978-10

Media Info

  • Pagination: 23 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00189878
  • Record Type: Publication
  • Source Agency: Massachusetts Institute of Technology
  • Report/Paper Numbers: MITSG 78-17J
  • Files: TRIS
  • Created Date: Apr 25 1979 12:00AM