Minimizing differential deflection in a pontoon-type,very large floating structure via gill cells |
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| Institution: | 1. Centre for Offshore Research and Engineering, Department of Civil Engineering, National University of Singapore, Kent Ridge, Singapore 119260, Singapore;2. Maritime and Port Authority of Singapore, 460 Alexandra Road, #17-00, PSA Building, Singapore 119963, Singapore;3. Jurong Consultants Pte Ltd, 8 Jurong Town Hall Road, The JTC Summit, Singapore 609434, Singapore;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. 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;3. School of Marine Science and Technology, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK |
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| Abstract: | When a pontoon-type, very large floating structure is heavily loaded in the central portion, it will deform with its central deflection much larger than its corner deflections. The resulting differential deflection, if large enough, may cause machines and equipment sensitive to differential deflection to cease operation or the floating structure to be subjected to additional large stresses. In this paper, we introduce the so-called gill cells which are compartments within the floating structure with holes or slits at the bottom floor to allow water to flow in and out freely. It will be shown herein that these gill cells reduce the differential deflection and the bending stresses significantly while maintaining the structural stiffness integrity by using the example problem of a super-large floating container terminal. |
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