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Experimental study of slam-induced stresses in a containership
Institution:1. Unit of Marine Technology Engineering, Instituto Superior Técnico, Universidade Técnica de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;2. University of Newcastle upon Tyne, Department of Marine Technology, Armstrong Building, NE 7RU Newcastle upon Tyne, UK;1. ENSA Agadir, MMGC, Avenue Tamesoult, Agadir 80000, Maroc;2. Laboratoire d’Innovation Durable et de Recherche Appliquée (L.I.D.R.A), Universiapolis, Bab Al Madina, QrTilila, Agadir, Morocco;3. ENSTA Bretagne, IRDL, UMR CNRS 6027, 2 Rue François Verny, 29806 Brest Cedex 9, France;4. University of Technology, Bagdad, Iraq;1. State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;2. Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai 200240, China;1. Australian Maritime College, University of Tasmania, TAS 7248, Australia;2. Arab Academy for Science, Technology and Maritime Transport, Alexandria 1029, Egypt;3. University College London, London WC1E 7JE, UK;4. Centre for Advanced Composite Materials, University of Auckland, Auckland 1023, New Zealand;1. National Maritime Research Institute, Japan;2. Osaka University, Japan;1. Korea Research Institute of Ships and Ocean Engineering, Daejeon, Korea
Abstract:Experiments for the ship motions and sea loads were carried out on a segmented model of a container ship in ballast condition. Comparisons between the measurements and the theoretical results were carried out for the vertical motions and bending moments. For the evaluation of the primary stresses it is assumed that the total vertical bending moment induced by waves is divided into one component obtained by the linear theory and another one is due to the slamming loads. Several formulations for the determination of the slamming loads are compared with experimental results. The vibratory response of the model is calculated by modelling the hull with rotational springs and rigid links. Linear finite elements with a consistent mass formulation are adopted for the structural model and the response is obtained by modal superimposing and direct integration methods.
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