FPSO典型舱段极限强度研究
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江苏科技大学

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国家自然科学基金


Study on ultimate strength of typical tank of FPSO
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Jiangsu University of Science and Technology

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National Natural Science Foundation of China

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    摘要:

    针对FPSO主船体货舱区域结构采用ABAQUS准静态分析法,考虑材料非线性因素以及船舶工作海域实际海况,建立3档强框模型并对其在垂向弯矩、30°艏斜浪作用下的极限承载能力进行研究。采用整船波浪直接计算得到的弯矩RAO比值确定联合载荷中垂向与水平载荷加载关系。研究表明在垂向载荷作用时结构抵抗中拱弯矩的能力更强;引入水平载荷后会导致结构抵抗垂向外载荷能力的降低且对中垂极强弯矩的影响更大,极限弯矩发生时相应结构一般发生大面积的屈曲破坏;水平极限弯矩总是先于垂向极限弯矩出现,舭部结构的存在有效传导了中拱与水平弯矩联合载荷。

    Abstract:

    This research based on ABAQUS quasi-static analysis method for cargo hold area structure of FPSO main hull, a three-step strong frame model was established to study its ultimate bearing capacity under vertical bending moment and 30° bow wave, considering material nonlinearity and actual sea conditions in the vessel's working area.The relationship between vertical load and horizontal load in the combined load was determined by using the RAO ratio of bending moment directly calculated by the whole ship wave.The results show that the ability of arch bending moment is stronger when the structure is subjected to vertical load.When horizontal load is introduced, the resistance ability of the structure to vertical external load is reduced, and the influence on the extremely high bending moment of the mid-vertical is greater. When the ultimate bending moment occurs, the corresponding structure generally suffers buckling failure in a large area.The horizontal ultimate moment always appears before the vertical ultimate moment and the bilge structure effectively transits the joint load between the middle arch and the horizontal moment.

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  • 收稿日期:2021-03-01
  • 最后修改日期:2021-03-18
  • 录用日期:2021-03-19
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