WAVE FORCES ON CYLINDERS NEAR PLANE BOUNDARY

Potential flow theory predicts: (1) The added mass of a cylinder near a plane boundary is independent of the direction of the flow and more than twice as large as that of the same cylinder far away from the boundary; (2) a possible failure mechanism of alternating positive and negative lift force, which is proportional to horizontal velocity squared, for pipe-lines resting on the bottom boundary and subjected to waves and currents; and (3) the force from convective acceleration of the ambient flow can be large as 30% of total acceleration force for waves. Laminar boundary-layer theory suggests that a phase shift exists between maximum velocity and maximum drag force for cylinders subjects to waves. Laboratory wave force experimentation confirms the aforementioned theoretical findings 1 and 2.

  • Corporate Authors:

    American Society of Civil Engineers

    345 East 47th Street
    New York, NY  USA  10017-2398
  • Authors:
    • Yamamoto, T
    • Nath, J H
    • Slotta, L S
  • Publication Date: 1974-11

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00084590
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Report/Paper Numbers: #10961 Proceeding
  • Files: TRIS
  • Created Date: May 19 1975 12:00AM