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  United States  45206
• Authors:
  • KING, R
• Conference:
  • Presented at the 6th Offshore Technology Conference
  • Location: Houston Texas
  • Date: 1974-5-6 to 1974-5-8
• Publication Date: 1974-5

Media Info

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

Subject/Index Terms

• TRT Terms: Flow; Oscillation; Support piles; Vibration; Vortex shedding
• Old TRIS Terms: Flow induced vibration; Oscillating bodies
• Subject Areas: Design; Marine Transportation;

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