VORTEX-INDUCED NONLINEAR OSCILLATION OF TENSION LEG PLATFORM TETHERS

The paper concerns the nonlinear oscillation of tension leg platform tethers induced by vortex shedding in a combined wave and current field. Quadratic damping and parametric excitation are included in the mathematical model. Only the vortex-induced oscillations normal to the wave and current are considered. However, the method used can also be applied to study the in-line oscillations due to waves. Stability analysis of the nonlinear system will be presented in a separate paper. A multiple-term Galerkin's method is used in the numerical computations. Results for the CONOCO's Hutton TLP are presented to illustrate the importance of multiple-term solutions under lock-on conditions. The effects of the drag and lift coefficients and the frequencies of the waves and parametric excitations have also been investigated.

• Supplemental Notes:
  • Ocean Engng, v 18 n 5, 1991, p 451 [14 p, 7 ref, 1 tab, 7 fig]
• Authors:
  • Dong, Y
  • Lou, J Y
• Publication Date: 1991

Language

• English

Subject/Index Terms

• TRT Terms: Oscillation; Tension; Vortex shedding
• Old TRIS Terms: Tension leg platforms
• Subject Areas: Marine Transportation;

Filing Info

• Accession Number: 00700979
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM