Transient response of a ship to an abrupt flooding accounting for the momentum flux

Teemu Manderbacka, Tommi Mikkola, Pekka Ruponen, Jerzy Matusiak

Research output: Contribution to journalArticleScientificpeer-review

34 Citations (Scopus)

Abstract

Numerical non-linear time domain simulation method for damaged ship motions is presented. Floodwater motion modelling is based on the lumped mass method with a moving free surface. The ship and floodwater motions are fully coupled. The variation of the floodwater mass is accounted for. A model to account for the flooding ingress transporting the momentum is presented. The experiments of abrupt flooding have shown that the ship may experience the first large roll towards the undamaged side, especially when a large undivided compartment is flooded. The presented time domain model is validated against the experimental data on the roll damping of the flooded ship and transient flooding. Two different initial stability conditions and two different compartment layouts are studied. Viscous dissipation of the floodwater motions is modelled with an equivalent friction coefficient. The impact of the viscous damping is studied. Transient flooding tests show that the inflow momentum has to be accounted for when the undivided compartment is flooded. The simulation model is capable of capturing the impact of the inflooding jet and the first roll on the opposite side of the damage is reproduced.

Original languageEnglish
Pages (from-to)108-126
Number of pages19
JournalJournal of Fluids and Structures
Volume57
DOIs
Publication statusPublished - 1 Aug 2015
MoE publication typeA1 Journal article-refereed

Keywords

  • Damage stability
  • Floodwater motion
  • Floodwater progression
  • Lumped mass
  • Sloshing
  • Time domain simulation

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