PREDICTION OF MOTION OF SHIPS WITH FLOODED COMPARTMENTS IN A SEAWAY

It is shown that in the presence of a free surface the flooded water in compartments have an influence upon all dynamic characteristics of a damaged ship, ie inertia, motion damping, transverse stability and exciting forces. These circumstances are proposed to be taken into account by means of a series of corrections for the relevant coefficients of dynamic equations. In order to calculate the corrections it is sufficient to have the information concerning the static corrections for metacentric height, response amplitude operators (RAO) for liquid sloshing relative to every compartment and the corresponding phase values. It is found that satisfactory results can be obtained within the linear calculation scheme if dynamics of only fundamental forms of liquid volume oscillations is taken into consideration while damping of these oscillations is related to the energy dissipated in generation higher order waves on liquid surface and in hydraulic losses if any. Then the possibility of considering the compartment permeability factors is easily realised. The method of correction, apart from clear physical interpretation of influence of a flooded compartment on ship motions, is very convenient due to possibilities offered for application of one and the same algorithm for predicting the motions of a damaged ship both with and without the flooded compartments.

  • Supplemental Notes:
    • STAB 94, 5th Intl Conf on Stability of Ships and Ocean Vehicles; 7-11 Nov 1994; Florida, USA. Sponsored by SNAME, USA and RINA, UK. Procs. Publ by Florida Inst Technology, USA. Vol 2, session 7 [18 p, 25 ref, 1 tab, 7 fig]
  • Authors:
    • Rakhmanin, N
    • Zhivitsa, S
  • Publication Date: 1994

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00717036
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Mar 4 1996 12:00AM