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Simple method to evaluate ultimate hull girder strength of bulk carrier in alternate heavy loading condition
Pages: 849-857
Year: Issue:  7
Journal: Journal of Ship Mechanics

Keyword:  two-beam theoryultimate hull girder strengthbulk carriertotal system collapse analysisalternate heavy loading condition;
Abstract: When heavy cargos such as ore are loaded on bulk carrier, they are usually loaded only in cargo holds of an odd number, which is called alternate heavy loading condition. Under such situation, double bottom structure is subjected to local bending, and this reduces the ultimate hull girder strength in hogging. In this paper, a simple method is proposed which can account for the influence of local bending of double bot-tom on the ultimate hull girder strength in the framework of Smith’s method. Two-beam theory is applied and local bending of double bottom as a plate is also considered. The calculated results are compared with the FEM results, and the proposed method is assessed.
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