不同对接焊缝布置下舰体结构的疲劳强度和极限承载分析  

Fatigue and ultimate strength analysis of naval structures with different butt-welding lines distribution

作　　者：黄洁琼[1] 薛鸿祥[1] 唐文勇[1] 宋友良[2] 

机构地区：[1]上海交通大学海洋工程国家重点实验室,上海200030 [2]中国船舶工业集团公司船舶工艺研究所,上海200032

出　　处：《舰船科学技术》2008年第1期62-66,共5页Ship Science and Technology

摘　　要：舰船建造中焊接结构强度对船体结构强度分析有着十分重要的意义。对两种不同对接焊缝布置下的船体结构进行疲劳强度和极限承载能力分析。利用国际焊接学会推荐的焊接结构三维块体单元建模,运用Nastran软件计算拉伸和弯曲两种主要受载形式下的结构应力分布,参考有关规范中的S-N曲线对焊接结构进行热点应力疲劳分析比较。同时运用非线性计算软件ABAQUS分析结构在轴向拉伸和弯曲载荷作用下的极限承载能力。分析表明,舰船总段合拢中采用纵骨与板同一截面的对接形式,其结构性能与传统的纵骨与板交错布置的对接形式相当。In the naval vessel construction, the strength of welding structures plays important role in ship structural strength assessment. The fatigue and ultimate strength analysis of hull structure with two different butt-welding lines distribution was researched in this paper. Recommended by the International Institute of Welding（ IIW）, 3-D finite element modal of welding structure is calculated by Nastran to obtain the structural stress distribution under the tension and bending correspondingly. According to S-N curves in ABS rules, the fatigue strength of welding structures can be predicted by hot spot stress method. The uhimate tension find bending load capability was calculated by non-linear analysis software ABAQUS in this paper. Based on the results in this paper, it was demonstrated that the structural mechanics performance of new form with the longitudinal and plate butt-welding lines distribution at the same section, was comparable to that of traditional form with stagger distribution in the ship assembly joint.

关 键 词：对接焊缝 细化模型 热点应力疲劳 极限承载能力 

分 类 号：U661.43[交通运输工程—船舶及航道工程] TG405[交通运输工程—船舶与海洋工程]