Investigation on a damaged ship model sinking into water based on three dimensional SPH method |
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| Institution: | 1. Research Center of Coastal and Estuarine Engineering, Tianjin Research Institute for Water Transport Engineering, Ministry of Transport, Tianjin 300456, China;2. Department of Naval Architecture and Marine Engineering, University of Strathclyde, Glasgow, G4 0LZ, UK;1. Aalto University, Department of Mechanical Engineering, Espoo, Finland;2. Universitá degli Studi di Napoli, Federico II, Department of Industrial Engineering, Naples, Italy;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 Applied Mechanics, Helsinki, Finland;2. Napa Ltd, Helsinki, Finland;3. Aalto University, School of Electrical Engineering, Department of Automation and Systems Technology, Helsinki, Finland;1. CEHINAV Research Group, ETSI Navales, Technical University of Madrid, Av. Arco de la Victoria 4, 28040, Madrid, Spain;2. School of Aeronautics and Space Engineering, Technical University of Madrid, Plaza Cardenal Cisneros 3, 28040, Madrid, Spain;3. Department of Engineering and Architecture, University of Trieste, Via A. Valerio 10, 34127, Trieste, Italy |
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| Abstract: | Damaged ship at sea will be a direct threat to lives and property, and it has a great significance of studying ship's remaining buoyancy, stability, sinking time and other important parameters. The process of a damaged ship sinking into water is a complex motion involving ship hull, inner and outer fluid coupled with waves and many other factors. It is featured by high nonlinearity and hard to establish a precise theoretical model to study. Yet SPH (smoothed particle hydrodynamics) as a meshfree method has a great advantage in solving such problems because of the nature of self-adaptive and Lagrangian. Firstly, the experiments of two scaled ship models with different openings sinking into water are carried out, through the sinking processes of broadside opening and bottom opening models, the conclusion is drawn that although the serious loss of stability of broadside opening model, the sinking time and other parameters are more conducive to rescue after maritime distress. Secondly, the parallel program of three dimensional SPH is developed to simulate the above more complex model, broadside opening model. The coupled process of sloshing is compared with that of experiment, and the results show good agreement with each other which verify the accuracy and feasibility of three dimensional parallel program. |
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