Response-based environmental conditions for the design of steel catenary risers

This work presents a semi-analytical methodology to select design environmental conditions based on long-term cross-section utilization ratios at the TDZ (Touchdown Zone) for steel catenary risers. This approach uses simplified analytical models to calculate time series of short-term utilization ratios, defined according to the DnV-OS-F201 (2010) standard. After processing these time series, long-term utilization ratios can be determined with relatively low computational cost. By evaluating long-term utilization ratios, it is possible to define short-term design environmental conditions, defined as short-term conditions for which the extreme riser responses are equal to the long-term ones. This kind of methodology may represent a substantial change to the traditional focus given to riser design, which is based on responses obtained from extreme environmental conditions, instead of on the extreme responses.

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 01676836
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 17 2018 3:06PM