|
|||||
|
|
Transient response of a ship to an abrupt flooding accounting for the momentum flux |
|
| Affiliation: | 1. Aalto University, School of Engineering, Department of Applied Mechanics, Helsinki, Finland;2. Napa Ltd, Helsinki, Finland;1. Aalto University School of Engineering, Department of Mechanical Engineering, Marine Technology, Puumiehenkuja 5, P.O. Box 14300, 02150, Espoo, Finland;2. NAPA, Tammasaarenkatu 3, 00180, Helsinki, Finland;3. CTO, Ship Design and Research Centre, Environmental Laboratories Division, 65 Szczecińska St., 80-392, Gdańsk, Poland;4. MEC Insenerilahendused OÜ, Akadeemia tee 21/1, 12618, Tallinn, Estonia;1. Department of Industrial Engineering, University of Naples Federico II, Via Claudio 21, Naples, Italy;2. Department of Naval Architecture Ocean and Marine Engineering, University of Strathclyde, Glasgow, UK;1. State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, 200240 Shanghai, China;2. Faculty of Engineering, Computing and Mathematics, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia;3. School of Marine Science and Technology, Newcastle University, Newcastle upon Tyne EN1 7RU, United Kingdom |
| 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. |
| Keywords: | Time domain simulation Floodwater progression Floodwater motion Lumped mass Sloshing Damage stability |
| 本文献已被 ScienceDirect 等数据库收录！ | |