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

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Journal Title
Journal ISSN
Volume Title
School of Engineering | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2015
Major/Subject
Mcode
Degree programme
Language
en
Pages
108-126
Series
Journal of Fluids and Structures, Volume 57
Abstract
Numerical non-linear time domain simulation method for damaged ship motionsis presented. Floodwater motion modelling is based on the lumpedmass method with a moving free surface. The ship and floodwater motionsare fully coupled. The variation of the floodwater mass is accounted for. Amodel to account for the flooding ingress transporting the momentum is presented.The experiments of abrupt flooding have shown that the ship mayexperience the first large roll towards the undamaged side, especially when alarge undivided compartment is flooded. The presented time domain modelis validated against the experimental data on the roll damping of the floodedship and transient flooding. Two different initial stability conditions andtwo different compartment layouts are studied. Viscous dissipation of thefloodwater motions is modelled with an equivalent friction coefficient. Theimpact of the viscous damping is studied. Transient flooding tests show thatthe 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.
Description
Keywords
time domain simulation, floodwater progression, floodwater motion, lumped mass, sloshing, damage stability
Other note
Citation
Manderbacka, Teemu & Mikkola, Tommi & Ruponen, Pekka & Matusiak, Jerzy. 2015. Transient response of a ship to an abrupt flooding accounting for the momentum flux. Journal of Fluids and Structures. Volume 57. 108-126. ISSN 0889-9746 (printed). DOI: 10.1016/j.jfluidstructs.2015.06.001.