A computational system has been developed which can be used to calculate the interactions of waves with any configuration of perforated walls. The mathematical model includes the non-linear pressure flow relation at the perforated wall. Using these programmes a study has been made of nearly hollow cylindrical and double concentric perforated systems as employed in offshore designs. The behaviour of these systems is discussed and compared with the behaviour of planar harbour breakwaters, and with solid offshore designs. The main conclusions are that: (i) In contrast to the behaviour of planar breakwaters the wave forces on cylindrical jackets are minimised by reducing the absorption of wave energy and maximising the wave flow through the system. (ii) Perforated protection walls around large solid structures do not reduce the total wave force, but may be added to an existing structure for other reasons without greatly increasing the forces. (iii) Reduction of the structure cross-section around the wave surface offers the best design solution to the wave force problem.

Media Info

  • Features: References;
  • Pagination: p. 781-796

Subject/Index Terms

Filing Info

  • Accession Number: 00138196
  • Record Type: Publication
  • Source Agency: Offshore Technology Conference
  • Report/Paper Numbers: V1, OTC 2501 Proceeding
  • Files: TRIS
  • Created Date: Aug 23 1976 12:00AM