矿砂船舱口间甲板结构的横向强度评估
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摘要
针对一艘舱口间甲板发生屈曲破坏的矿砂船,对其舱口间甲板及其附连结构进行横向压缩强度分析.根据已提出的基于"第一原理"的简化计算方法,采用非线性有限元分析方法,对舱口间甲板结构进行横向极限强度分析,非线性有限元计算结果与简化计算方法的结果接近,验证了简化计算方法的合理性.此外,为了预估结构可能的失效模式,采用半解析公式计算舱口间甲板结构的临界应力,为强度评估提供了依据.综合评估结果表明,舱口间甲板结构的强度储备不足以抵抗外部载荷,屈曲破坏起始于檐板、舱口间甲板和垂向列板,这与目标船的事故分析报告中的屈曲现象吻合.
The transverse compressive strength of the cross-deck and its attached structure of an ore carrier with buckling failure was analyzed. According to the simplified calculation method based on the "first principle", the nonlinear finite element analysis method was adopted to analyze the transverse ultimate strength of the deck structure. The results of nonlinear finite element calculation are close to those of simplified calculation method, which verifies the rationality of simplified calculation method. In addition, in order to predict the possible failure modes of the structure, the semi-analytical formula was used to calculate the critical stress of the cross-deck structure, which provides the basis for strength evaluation The comprehensive evaluation results show that the strength reserve of the cross-deck structure is insufficient to resist external loads, and the buckling damage starts from the curtain plate, upper deck and upper stool vertical plate, which is consistent with the buckling phenomenon in the accident analysis report of the target ship.
The transverse compressive strength of the cross-deck and its attached structure of an ore carrier with buckling failure was analyzed. According to the simplified calculation method based on the "first principle", the nonlinear finite element analysis method was adopted to analyze the transverse ultimate strength of the deck structure. The results of nonlinear finite element calculation are close to those of simplified calculation method, which verifies the rationality of simplified calculation method. In addition, in order to predict the possible failure modes of the structure, the semi-analytical formula was used to calculate the critical stress of the cross-deck structure, which provides the basis for strength evaluation The comprehensive evaluation results show that the strength reserve of the cross-deck structure is insufficient to resist external loads, and the buckling damage starts from the curtain plate, upper deck and upper stool vertical plate, which is consistent with the buckling phenomenon in the accident analysis report of the target ship.
引文
[1] HUGHES O F,PAIK J K .Ship structural analysis and design[J].Society of Naval Architects and Marine Engineers,2010(1):25-29.
[2] 罗秋明,薛鸿祥,唐文勇.45万吨级超大型矿砂船全船结构有限元分析[J].船舶工程,2010(2):156-164.
[3] DO H C,JIANG W,JIN J X.Estimation of ultimate limit state for stiffened-plates structures:applying for a very large ore carrier structures designed by IACS common structural rules[J].Applied Mechanics and Materials,2013(4):1012-1018.
[4] ZHANG S,KHAN I.Buckling and ultimate capability of plates and stiffened panels in axial compression[J].Marine Structures,2009,22(4):791-808.
[5] ZHANG S.A review and study on ultimate strength of steel plates and stiffened panels in axial compression[J].Ships and Offshore Structures,2016,11(1):81-91.
[6] ZHU L,CHENG F.Strength assessment of ore carrier cross-deck structures[C].The Twenty-fourth International Ocean and Polar Engineering Conference,London,2014.
[7] FUJIKUBO M,YAO T,KHEDMATI M R,et al.Estimation of ultimate strength of continuous stiffened panel under combined transverse thrust and lateral pressure Part 1:Continuous plate[J].Marine Structures,2005,18(5):383-410.
[8] 吉国明,孙刚,张量.承受轴压载荷的加筋板的准静态分析[J].机械强度,2013,35(3):308-311.
[9] HUGHES O F.Ship structural design:a rationally-based,computer-aided,optimization approach[M].New York:Wiley-Interscience,1983.
[10] FAULKNER D,ADAMCHAK J C,SNYDER G J,et al.Synthesis of welded grillages to withstand compression and normal loads[J].Computers & Structures,1973,3(2):221-246.
[11] PAIK J K,THAYAMBALLI A K,PARK Y E.Local buckling of stiffeners in ship plating[J].Journal of Ship Research,1998,42(1):56-67.
[12] PAIK J K,THAYAMBALLI A K,LEE W H.A numerical investigation of tripping[J].Marine structures,1998,11(4):159-183.
[2] 罗秋明,薛鸿祥,唐文勇.45万吨级超大型矿砂船全船结构有限元分析[J].船舶工程,2010(2):156-164.
[3] DO H C,JIANG W,JIN J X.Estimation of ultimate limit state for stiffened-plates structures:applying for a very large ore carrier structures designed by IACS common structural rules[J].Applied Mechanics and Materials,2013(4):1012-1018.
[4] ZHANG S,KHAN I.Buckling and ultimate capability of plates and stiffened panels in axial compression[J].Marine Structures,2009,22(4):791-808.
[5] ZHANG S.A review and study on ultimate strength of steel plates and stiffened panels in axial compression[J].Ships and Offshore Structures,2016,11(1):81-91.
[6] ZHU L,CHENG F.Strength assessment of ore carrier cross-deck structures[C].The Twenty-fourth International Ocean and Polar Engineering Conference,London,2014.
[7] FUJIKUBO M,YAO T,KHEDMATI M R,et al.Estimation of ultimate strength of continuous stiffened panel under combined transverse thrust and lateral pressure Part 1:Continuous plate[J].Marine Structures,2005,18(5):383-410.
[8] 吉国明,孙刚,张量.承受轴压载荷的加筋板的准静态分析[J].机械强度,2013,35(3):308-311.
[9] HUGHES O F.Ship structural design:a rationally-based,computer-aided,optimization approach[M].New York:Wiley-Interscience,1983.
[10] FAULKNER D,ADAMCHAK J C,SNYDER G J,et al.Synthesis of welded grillages to withstand compression and normal loads[J].Computers & Structures,1973,3(2):221-246.
[11] PAIK J K,THAYAMBALLI A K,PARK Y E.Local buckling of stiffeners in ship plating[J].Journal of Ship Research,1998,42(1):56-67.
[12] PAIK J K,THAYAMBALLI A K,LEE W H.A numerical investigation of tripping[J].Marine structures,1998,11(4):159-183.