Numerical assessment of factors affecting the survivability of damaged ro–ro ships in waves

Abstract A mathematical model in the time domain of the motions and flooding of ships in a seaway is described. This model is applied to the numerical simulation of the behaviour of a damaged ro–ro ship in waves. The effects of parametric variations of different factors in the ship's survivability are asessed. Numerical results are given for a passenger ro–ro ship, which is studied in a damage condition that includes the main engine room. The permeability of this room is taken in consideration by modeling the engines as intact blocks inside the engine room. The ship's survivability in irregular waves is then calculated for different variations in the following parameters: vertical location of the centre of gravity, spectral description of the seaway, roll damping factor, discharge coefficients, depth to main deck, double-hull in the main deck and initial heel angle. The transient effects associated with complicated damage condition geometries and the floodwater effects on roll motion are also assessed. The results are discussed and conclusions drawn.

[1]  J R Paulling,et al.  THE SIMULATION OF SHIP MOTIONS AND CAPSIZING IN SEVERE SEAS , 1989 .

[2]  Robert Tagg,et al.  A PERFORMANCE-BASED ASSESSMENT OF THE SURVIVAL OF DAMAGED SHIPS: FINAL OUTCOME OF THE EU RESEARCH PROJECT HARDER. , 2003 .

[3]  Heinrich Söding.  Flow computations for ship safety problems , 2002 .

[4]  C. Guedes Soares,et al.  Time domain modelling of the transient asymmetric flooding of Ro-Ro ships , 2002 .

[5]  Bor-Chau Chang,et al.  Survivability of damaged RO-RO passenger vessels , 2000 .

[6]  Michael S. Pantazopoulos.  THREE-DIMENSIONAL SLOSHING OF WATER ON DECKS , 1988 .

[7]  I W Dand.  EXPERIMENTS WITH A FLOODABLE MODEL OF A RO-RO PASSENGER FERRY , 1991 .

[8]  B. L. Hutchison,et al.  Model experiments to determine the survivability limits of damaged RO-RO ferries in waves. Discussion. Authors' closure , 1997 .

[9]  A. Incecik,et al.  An experimental study of motion behaviour with an intact and damaged Ro-Ro ship model , 2004 .

[10]  C. Guedes Soares,et al.  RO-RO SHIP DAMAGE STABILITY CALCULATIONS USING THE PRESSURE INTEGRATION TECHNIQUE , 2001 .

[11]  Apostolos Papanikolaou,et al.  COMPUTER-AIDED SIMULATIONS OF LARGE AMPLITUDE ROLL MOTIONS OF SHIPS IN WAVES AND OF DYNAMIC STABILITY , 1987 .

[12]  Dongkon Lee,et al.  Theoretical and experimental study on dynamic behavior of a damaged ship in waves , 2007 .

[13]  C. Guedes Soares,et al.  Study of damaged ship motions taking into account floodwater dynamics , 2008 .

[14]  Dracos Vassalos,et al.  A realistic approach to assessing the damage survivability of passenger ships. Discussion. Authors' closure , 1994 .

[15]  Jeff Dillingham,et al.  MOTION STUDIES OF A VESSEL WITH WATER ON DECK , 1980 .

[16]  Evangelos Boulougouris,et al.  Investigation into the sinking of the Ro-Ro passenger ferry Express Samina , 2004 .

[17]  J T Stubbs,et al.  FLOODING PROTECTION OF RO-RO FERRIES , 1996 .