组合载荷作用下加筋板极限强度相互关系公式  

Interaction formulae of ultimate strength for stiffened panels under combined loads

作　　者：万琪[1] 宋召军 钱伟 杨鑫[2] 李晓彬[2,3] WAN Qi;SONG Zhao-jun;QIAN Wei;YANG Xin;LI Xiao-bin(Marine Design and Research Institute of China,Shanghai 200011,China;School of Naval Architecture,Ocean and Energy Power Engineering,Wuhan University of Technology,Wuhan 430063,China;Key Laboratory of High Performance Ship Technology(Wuhan University of Technology),Ministry of Educa-tion,Wuhan 430063,China)

机构地区：[1]中国船舶及海洋工程设计研究院,上海200011 [2]武汉理工大学船海与能源动力学院,武汉430063 [3]高性能船舶技术教育部重点实验室(武汉理工大学),武汉430063

出　　处：《船舶力学》2025年第2期277-287,共11页Journal of Ship Mechanics

摘　　要：船舶航行时整体船体梁受到货物装载载荷、船底吃水静水弯矩与波浪弯矩等组合载荷联合作用,而其局部船体加筋板结构则承受面内纵向、横向与面外压力载荷等三向载荷联合作用。侧向载荷的大小不同程度地影响加筋板面内的纵向与横向承载能力,故需建立组合载荷共同加载条件下的加筋板极限强度相互关系式。本文以散货轮船底结构为研究对象,采用对称循环边界的双跨双弯几何范围加筋板模型,应用非线性有限元法分析实船连续船体结构遭受横向、纵向与侧向等组合载荷联合作用时的极限强度相互影响规律。通过研究发现,通常侧向载荷降低加筋板结构纵向与横向极限承载力,且板柔度越小则降低越大,同时建议分别通过增大型材尺寸与板材厚度提高侧压作用下的纵向与横向极限承载力,并提出组合载荷联合作用下的加筋板极限强度相互关系表达式。该方法可评估纵向、横向与侧向载荷联合作用下的极限强度相互关系,以开展复合载荷状态下的船舶加筋板结构强度设计的快速评估。In ships’voyaging conditions,the global hull girder is subjected to the combination action of cargo loads on ship decks,still water moment and wave moment on hull bottom,and correspondingly partial ship stiffened panels suffer complex loads including longtudinal,transverse forces and pressures.Lateral loads could to some degree influence the ultimate compressive strength in the longitudinal and transverse directions.Thus,it is needed to establish the interaction formulae of ultimate strength for stiffened panels under combined loads.The stiffened panel structures in hull bottom of bulk carrier was selected as the research object.Based on the two-bays-and-two-spans geometrical extent model of stiffened panel with periodic boundary conditions,a nonlinear numerical method was employed to investigate the interaction formulae of ultimate strength for hull girder structures under longitudinal,transverse and lateral loads.It is found that lateral loads always reduce the ultimate strength in longitudinal and transverse directions,meanwhile the larger the lateral loads are,the more the ultimate strength decreases.It is suggested to increase stiffener size and plate thickness for improving the longitudinal and transverse ultimate strength under lateral pressures,respectively.The interaction formulae were developed to assess the ultimate strength of stiffened panels under combined loads and the interaction relationship of ultimate strength under multiple loads.It can be used to perform rapid calculation on the structural strength design under complex combined loads.

关 键 词：组合载荷 加筋板 极限强度 数值仿真 相互公式 

分 类 号：U661[交通运输工程—船舶及航道工程]