TIME-DOMAIN SIMULATION OF LARGE-AMPLITUDE RESPONSE OF FLOATING PLATFORMS

Two numerical simulation models to predict large-amplitude motions of floating platforms are presented. The first method is based on the application of the relative-velocity formulation of Morison's equation for force calculations. The second method developed in this work uses the three-dimensional potential theory in time domain. In this method, both the Froude-Krylov and scattering forces are calculated by considering finite wave amplitude effects in random waves. The effect of various nonlinearities on the low-frequency motions and high-frequency tether-tension response of a tension leg platform are studies using these simulation models in conjunction with power spectral methods. The presence of current and the nonlinear drag force are observed to have a significant effect on the low frequency motions and tether tensions.

• Supplemental Notes:
  • Ocean Engng, v 22 n 4, May 1995, p 367 [19 p, 33 ref, 10 fig]
• Authors:
  • Chitrapu, A S
  • Ertekin, R C
• Publication Date: 1995

Language

• English

Subject/Index Terms

• TRT Terms: Mathematical models; Motion; Offshore platforms; Time; Time domain analysis
• Uncontrolled Terms: Numerical models
• Old TRIS Terms: Large amplitude; Platform motions; Platform response
• Subject Areas: Bridges and other structures; Marine Transportation;

Filing Info

• Accession Number: 00717277
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Mar 4 1996 12:00AM