VORTEX EXCITED STRUCTURAL OSCILLATIONS OF A CIRCULAR CYLINDER IN STEADY CURRENTS

Flow-induced oscillations in the cross-flow direction of circular structures in air are well documented but the excitation of flow-direction (in-line) oscillations of marine piles during construction of an oil terminal was totally unexpected, particularly as they were excited by velocities of one quarter those anticipated for the excitation of cross-fire. This paper is applicable to offshore structures in locations where significant steady currents are encounted (e.g. the N. Sea). It emphasizes the importance of considering excitation of fundamental and higher normal modes of structural oscillations in the flow direction, as these can be excited in velocities one quarter those required for cross-flow excitation. The use of free surface hydroelastic models is justified by quantitative correlation with full scale test results.

  • Supplemental Notes:
    • Presented at the 6th Annual Offshore Technology Conference, Houston, Texas, May 6-8, 1974. Requests for this paper should be directed to David L. Riley, Offshore Technology Conference.
  • Corporate Authors:

    Offshore Technology Conference

    6200 North Central Expressway
    Dallas, TX  USA  45206
  • Authors:
    • KING, R
  • Conference:
  • Publication Date: 1974-5

Media Info

  • Features: References;
  • Pagination: p. 143-154
  • Serial:
    • Volume: 1

Subject/Index Terms

Filing Info

  • Accession Number: 00072905
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Report/Paper Numbers: OTC #1948 Paper
  • Files: TRIS
  • Created Date: Jan 16 1975 12:00AM