SUM-FREQUENCY DIFFRACTION LOADS ON TENSION-LEG PLATFORMS IN BIDIRECTIONAL WAVES

Second-order diffraction theory is utilized to compute the sum- frequency diffraction loads on a deepwater tension leg platform (TLP) in bidirectional waves. The linear diffraction solution is obtained utilizing a Green's function approach using higher-order boundary elements. The second-order potential are computed suing the indirect, assisting radiation potential method. An efficient numerical technique is presented to treat the free-surface integral which appears in the second-order load formulation. Numerical results are presented for a stationary ISSC TLP in water of infinite depth. It is found that wave directionality may have a significant influence on the second-order hydrodynamic loads on a TLP and that the assumption of undirectional waves does not always lead to conservative estimates of the sum-frequency loading.

• Supplemental Notes:
  • OMAE 1995, 14th Intl Conf on Offshore Mechanics & Arctic Engng; 18-22 June 1995; Copenhagen, Denmark. Sponsored by ASME et al. Procs. Publ by ASME, ISBN 0-7918-1307-X. Vol I, Pt B, p 161 [8 p, 13 ref, 14 fig]
• Authors:
  • Vazquez, J H
  • Williams, A N
• Publication Date: 1995

Language

• English

Subject/Index Terms

• TRT Terms: Diffraction; Numerical analysis
• Old TRIS Terms: Hydrodynamic loads; Tension leg platforms; Wave diffraction
• Subject Areas: Marine Transportation;

Filing Info

• Accession Number: 00718515
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Mar 27 1996 12:00AM