SLOWLY VARYING DRIFT FORCES IN DIRECTIONAL WAVES

This paper is concerned with the numerical simulation of slowly varying drift forces in short crested waves. The new formulae of drift forces in cross waves are derived, based on Newman's far field theory and momentum conservation formulae. Numerical calculations of bidirectional quadratic transfer function of the drift forces due to an arbitrary combination of two waves of the same frequency from different directions have been carried out by using three-dimensional source technique. And the properties of transfer functions of drift forces are investigated. Calculated results indicate the importance of nonlinear interference of wave direction on drift forces. Finally, we discuss the applicability of Newman's assumption with respect to slowly varying drift forces and influence of different numerical models on drift forces in short crested waves.

• Supplemental Notes:
  • BOSS 92, 6th Intl Conf on the Behaviour of Offshore Structures; 7-10 July; London, U.K. Procs. Publ by BPP Tech Services Ltd., London. Vol 2, p 1184 [9 p, 8 ref, 18 fig]
• Authors:
  • INOUE, Y
  • Xue, W Y
• Publication Date: 1992

Language

• English

Subject/Index Terms

• TRT Terms: Drift; Mathematical models; Ship motion
• Old TRIS Terms: Directional seas; Drift forces
• Subject Areas: Geotechnology; Marine Transportation;

Filing Info

• Accession Number: 00704033
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM