NUMERICAL ANALYSIS OF NONLINEAR SHIP WAVEMAKING PROBLEM BY THE COUPLED ELEMENT METHOD

In this paper, the free surface condition for the ship wavemaking problem is analyzed and simplified with a new order analysis for the ship wavemaking potential based on the slow-ship theory. The total velocity potential is expressed as PHI= + r+ , where is the wave disturbance potential, and r is the double-body disturbance potential with the order O(Fnk) and k>1, so that the nonlinear free surface condition can be simplified and calculated on z=0. In the numerical calculation, the coupled element method is applied. The flow domain is divided into inner and outer regions. The finite element method is used with the simplified nonlinear free surface condition for the inner region and the Green function method is employed with the linear free surface condition for the outer region. In the outer region, the Kelvin source function is used as the Green function, so that no numerical treatment of the radiation condition is needed. Numerical calculations were carried out for a cylinder, a sphere, a Wigley model and a Series 60 Block 60 ship model. The computed results agreed well with the experimental results.

  • Supplemental Notes:
    • 6th Intl Conf on Numerical Ship Hydrodynamics; 2-5 Aug 1993; Iowa, USA. Sponsored by US National Research Council et al. Procs. Publ by National Academy Press, USA, 1994. Session 2, p 45 [12 p, 9 ref, 2 tab, 6 fig]
  • Authors:
    • Yu, X W
    • Hsiung, C C
  • Publication Date: 1994

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00716181
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Feb 28 1996 12:00AM