Design safety margin of a 10,000 TEU container ship through ultimate hull girder load combination analysis |
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| Institution: | 1. School of Marine Science and Technology, Newcastle University, UK;2. Lloyds Register Asia, Technology Group, South Korea;1. Department of Naval Architecture and Ocean Engineering, INHA University, 100, Inha-ro, Nam-gu, Incheon, South Korea;2. Marine Structure Research Department, Hyundai Heavy Industries, Co., Ltd., 1000, Bangeojinsunhwan-doro, Dong-gu, Ulsan, South Korea;3. DSME R&D Institute, Daewoo Shipbuilding and Marine Engineering, Co., Ltd., 3370, Geoje-daero, Geoje-si, Gyeongsangnam-do, South Korea;4. Research Department, Marine & Offshore Division, Bureau Veritas, 92200, Neuilli sur Seine, France;1. Hyundai Heavy Industries Co., Ltd., Ulsan, Republic of Korea;2. University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, Croatia;3. Bureau Veritas, Research Department, Paris, France;4. Pusan National University, Department of Naval Architecture and Ocean Engineering, Busan, Republic of Korea;1. School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai, China;2. State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai, China;3. Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai Jiao Tong University, Shanghai, China |
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| Abstract: | Assessment of the ultimate longitudinal strength of hull girders under combined waveloads can be of particular importance especially for ships with large deck openings and low torsional rigidity. In such cases the horizontal and torsional moments may approach or exceed the vertical bending moment when a vessel progresses in oblique seas. This paper presents a direct calculation methodology for the evaluation of the ultimate strength of a 10,000 TEU container ship by considering the combined effects of structural non-linearities and steady state wave induced dynamic loads on a mid ship section cargo hold. The strength is evaluated deterministically using non-linear nite element analysis. The design extreme values of principal global wave-induced load components and their combinations in irregular seaways are predicted using a cross-spectral method together with short-term and long-term statistical formulations. Consequently, the margin of safety between the ultimate capacity and the maximum expected moment is established. |
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| Keywords: | Non-linear FE analysis Ultimate hull girder strength Load combination Container ships |
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