INTERDEPENDENCE BETWEEN DYNAMIC SURGE MOTIONS OF PLATFORM AND TETHERS FOR A DEEP WATER TLP

The tethers of tension leg platforms (TLP's) undergoing surge motions are subjected to inertia and hydrodynamic loads. The purpose of this paper is to present an investigation into the effects of the tether curvature caused by these loads. The investigation is conducted by solving the coupled equations of surge motion of the tethers/platform system. The solution method presented here involves no linearisation of the equations of motion. For a typical TLP in 600 m deep water it is found that the effect of the tether curvature on the TLP surge motion is not significant. However, the amplitude of the surge restoring force supplied by the curved tethers is considerably larger (by a factor of about three) than would be the case if the tethers were straight. To ensure the reliable performance of deep water TLP's, tether/platform connections must be provided with sufficient horizontal load capacity to accommodate this increased force.

• Supplemental Notes:
  • Proceedings of the 4th International Conference on Behaviour of Offshore Structures, held Delft, The Netherlands, 1-5 July 1985, p. 557 [6 pp., 6 ref., 4 fig.]
• Authors:
  • Simiu, E
  • Carasso, A
• Publication Date: 1985

Language

• English

Subject/Index Terms

• Subject Areas: Marine Transportation;

Filing Info

• Accession Number: 00689922
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM