WAVE EXCITED OSCILLATIONS OF A GRAVITY PLATFORM

The dynamic response of a Condeep platform under transient linear wave excitation is determined by means of the modal method of analysis. The equations of motion for the fundamental torsional and bending modes are derived and solved by numerical step-by-step integration. The wave forces on the towers are obtained from a modification of Morison's formula, and the forces and moments on the base are calculated using the results of wave diffraction theory. In the case of bending oscillations, the effect of foundation flexibility and damping are incorporated by using the results of elastic half-space theory. Results calculated for various values of soil shear modulus are given.

• Supplemental Notes:
  • Prepared for ASME Meeting, Sept 19-24, 1976.
• Corporate Authors:

  American Society of Mechanical Engineers

  Two Park Avenue
  New York, NY  United States  10016-5990
• Authors:
  • Kirk, C L
  • Nataraja, R
• Publication Date: 1976-9

Media Info

• Features: References;
• Pagination: 11 p.

Subject/Index Terms

• TRT Terms: Amplitude (Physics); Excitation; Force; Gravity structures; Offshore structures; Oscillation; Waves
• Old TRIS Terms: Oscillation amplitude; Wave forces on structures
• Subject Areas: Bridges and other structures; Design; Marine Transportation;

Filing Info

• Accession Number: 00148551
• Record Type: Publication
• Source Agency: Engineering Index
• Report/Paper Numbers: Pap N76-Pet-33
• Files: TRIS
• Created Date: Mar 15 1977 12:00AM