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首页> 外文期刊>Marine Structures >Ultimate strength analysis of a bulk carrier hull girder under alternate hold loading condition - A case study Part 1: Nonlinear finite element modelling and ultimate hull girder capacity
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Ultimate strength analysis of a bulk carrier hull girder under alternate hold loading condition - A case study Part 1: Nonlinear finite element modelling and ultimate hull girder capacity

机译：交替保持载荷条件下散货船船体梁的极限强度分析-案例研究第1部分：非线性有限元建模和极限船体梁容量

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摘要

This is the first of two companion papers dealing with nonlinear finite element modelling and analysis of the ultimate strength of a bulk carrier hull girder under alternate hold loading (AHL) condition. The purpose is to contribute to establishing rational ultimate longitudinal strength criteria for the hull girder under combined loading. The focus is on the hogging condition. An important issue is the significant double bottom bending in empty holds in AHL due to combined global hull girder bending moment and local loads. The local loads may substantially reduce the strength of the hull girder. Different AHL conditions, i.e. fully loaded cargo and (partially) heavy cargo are considered. A critical review of external and internal design pressures for different AHL conditions is accomplished using both CSR-BC rules and DNV rules. A methodology for nonlinear finite element modelling of hold tanks of a bulk carrier under AHL is presented by use of ABAQUS. A mesh convergence study is carried out in order to find the appropriate mesh for the model. The implication of using different design pressures on the hull girder strength is assessed. The FE results can be used as a basis for establishing simplified methods applicable to practical design of ship hulls under combined loadings. This issue is discussed in the companion paper.
机译：这是两篇有关非线性有限元建模以及在交替保持载荷（AHL）条件下散装船体梁的极限强度分析的论文中的第一篇。目的是为建立组合荷载下船体梁的合理极限纵向强度标准做出贡献。重点是猪的状况。一个重要的问题是，由于整体船体梁的弯矩和局部载荷的共同作用，AHL空舱中出现了明显的双底弯曲。局部载荷可能会大大降低船体梁的强度。考虑了不同的AHL条件，即满载货物和（部分）重货物。使用CSR-BC规则和DNV规则对不同AHL条件的外部和内部设计压力进行严格审查。通过使用ABAQUS，提出了一种用于AHL下的散货船货舱非线性有限元建模的方法。为了找到适合模型的网格，进行了网格收敛研究。评估了使用不同设计压力对船体梁强度的影响。有限元分析结果可作为建立简化方法的基础，适用于组合载荷下船体的实际设计。随附文件中讨论了此问题。

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