摘要
极地海域环境恶劣且冰情复杂,船舶需要足够的结构强度来保障航行安全。现有的极地船舶结构设计规范及监测指南中,通常考虑材料弹性阶段内的许用应力,并设置较高的安全裕量,使得强度设计结果过于保守。本文基于结构强度稳定综合理论和塑性破坏模型,针对极地船舶结构的极限承载能力进行分析,推导了结构塑性变形条件下,船冰碰撞区域典型结构的极限强度计算公式,利用有限元分析方法,建立了结构极限强度数值分析模型。通过对比理论与数值结果,发现理论计算公式具有较高的准确性,可以作为极地船舶结构极限承载能力的快速校核手段。此外,参照规范设计要求,应用极限强度理论计算模型,给出各冰级船舶冰带区肋骨间距布置的建议,可为极地船舶结构的极限强度设计提供参考。
The extreme polar marine environment is harsh and the ice conditions are complex,requiring sufficient structural strength for navigation safety of ships.Existing design specifications and monitoring guidelines for polar ships senerally only consider the ultimate strength within the elastic phase of material under single loading conditions,resulting in overly conservative strength design.The ultimate bearing capacity of polar ship structures were analyzed based on the Combined Theory of Strength and Stability(CTSS)and plastic failure models,and a calculation formula for the ultimate strength of typical structures was derived in ship-ice collision areas under plastic deformation conditions.By using the finite element analysis method,a numerical analysis model for the ultimate strength of structures was established.By comparing the theoretical and numerical results,it was found that the theoretical calculation formula is highly accurate and can be used as a quick verification method for the ultimate bearing capacity of polar ship structures.Besides,with reference to the design requirements of specifications,the article provides recommendations for the arrangement of rib space in the ice belt areas of various ice-class ships based on the theory of ultimate strength,providing reference for the design of the ultimate strength of polar ship structures.
作者
顾赛男
孙凯
余朝歌
田于逵
季顺迎
GU Sai-nan;SUN Kai;YU Chao-ge;TIAN Yu-kui;JI Shun-ying(State Key Laboratory of Structural Analysis and CAE software for Industrial Equipment,Dalian University of Technology,Dalian 116024,China;National Key Laboratory of Hydrodynamics,China Ship Scientific Research Center,Wuxi 214082,China)
出处
《船舶力学》
北大核心
2025年第10期1618-1628,共11页
Journal of Ship Mechanics
基金
国家自然科学基金资助项目(42176241,U20A20327)
工信部极地船舶专项(CBG2N21-2-3)。
关键词
极地船舶
结构极限强度
塑性变形
结构设计
冰载荷
polar ship
ultimate strength
plastic deformation
structural design
ice load
