UNCERTAINTIES IN ESTIMATING SECOND-ORDER LOW-FREQUENCY WAVE FORCES AND RESPONSES

Second-order wave loads can cause low-frequency motions of a floating platform or vessel at an exposed offshore location. These forces and motions can be estimated numerically or from model tests in a wave basin, but there are many possible sources of uncertainty and inaccuracy whichever model is used. Both types of model involve simplifying assumptions. The consequences of these assumptions are not easy to assess, because the controlling physical processes are complex, leading to uncertainties in interpreting and correlating results from computer predictions and measurements. This paper reviews some of the main sources of uncertainty, and concludes with illustrative results from a recent correlation study on a semi-submersible vessel operating in the North Sea.

• Supplemental Notes:
  • OMAE 1991, 10th Intl Conf on Offshore Mechanics & Arctic Engng; 23-28 June 1991; Stavanger, Norway. Sponsored by ASME et al. Procs. Publ by ASME, Vol 1, Part A, p 175 [12 p, 38 ref, 1 tab, 11 fig]
• Authors:
  • Standing, R G
• Publication Date: 1991

Language

• English

Subject/Index Terms

• TRT Terms: Motion; Offshore platforms
• Old TRIS Terms: Platform motions; Platform response; Wave loads on structures
• Subject Areas: Bridges and other structures; Marine Transportation;

Filing Info

• Accession Number: 00702169
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM