MECHANICAL EXCITATION OF OFFSHORE TOWER MODEL

A large scale model of a bottom-pivoted, surface-piercing, cylindrical oil-drilling platform was built to obtain experimental data on hydrodynamic coefficients applicable to the structure. The wave force on the structure was simulated by a mechanical device in still water. Thus, the number of variables to calculate the drag and added mass coefficients associated with the structure for use in conjunction with the Morison equation was reduced. For instance, water particle velocity and acceleration were eliminated from the equation. Test runs were made at different simulated sea conditons. Consistent drag and added mass coefficients were obtained using various data reduction techniques.

• Supplemental Notes:
  • Order paper number 8713.
• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Rains, C
  • Chakrabarti, S K
• Publication Date: 1972-2

Media Info

• Pagination: p. 35-47
• Serial:
  • Journal of Waterways, Harbors & Coast Eng Div
  • Volume: 98
  • Issue Number: WW1
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Drag forces; Hydrodynamics; Offshore drilling platforms; Offshore structures
• Old TRIS Terms: Wave force analysis
• Subject Areas: Bridges and other structures; Design; Hydraulics and Hydrology; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00034782
• Record Type: Publication
• Source Agency: American Society of Civil Engineers
• Files: TRIS
• Created Date: Sep 29 1972 12:00AM