轴压侧压联合载荷作用下的加筋板失效模式分析  

Analysis of collapse modes of stiffened panels subjected to combined axial and lateral loads

作　　者：郭广宇 崔进举 王德禹[1,2] GUO Guangyu;CUI Jinju;WANG Deyu(State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Institute of Marine Equipment,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学海洋工程全国重点实验室,上海200240 [2]上海交通大学海洋装备研究院,上海200240

出　　处：《中国舰船研究》2025年第2期283-298,共16页Chinese Journal of Ship Research

基　　金：国家自然科学基金资助项目(52371328,51809167,U2241266)。

摘　　要：[目的]旨在研究侧压载荷对联合载荷作用下加筋板极限强度与失效机理的影响。[方法]基于非线性有限元方法建立数值模型,采用ABAQUS软件进行面内轴压与面外侧压载荷联合作用下的数值仿真分析,提取各工况下的加筋板面外位移场,并对其进行屈曲模态分解。在获得不同模型的模态幅值-轴向载荷曲线的基础上,量化加筋板的变形过程,结合应力云图分析加筋板在侧压不同工况下的变形行为与失效模式。[结果]结果显示,在联合载荷工况下,侧压载荷使加强筋在极限状态前发生端部屈服,导致整体屈曲模态幅值增加;随着侧压载荷的增加,加筋板整体屈曲成为联合载荷工况下的主导失效模式。[结论]所做研究揭示了加筋板变形失效过程中局部、整体屈曲模态幅值与失效模式的联系,可为船体板架结构设计提供参考。[Objective]This study analyzes the influence of lateral loads on the ultimate strength and collapse modes of stiffened panels subjected to combined loads.[Methods]Nonlinear finite element software ABAQUS is used to set up numerical models and perform numerical simulations under combined loads on different models.The out-of-plane displacement fields are captured and decomposed with buckling modes.The modal amplitude-axial load curves of different models are obtained,and the deformation process of stiffened panels is quantified.The deformation behaviors and collapse modes of stiffened panels in different load cases are then analyzed in combination with cloud diagrams.[Results]The results show that the lateral load in combined load cases causes the yielding of the stiffeners at the endings before the ultimate state,resulting in the increase of the overall buckling mode's amplitude.As the lateral load increases,the overall buckling of the stiffened panels becomes the dominant collapse mode under combined load cases.[Conclusion]The findings of this study reveal the relationship between local and global buckling mode amplitudes and collapse modes during the deformation process of stiffened panels,and can provide useful references for the design of ship frame structures.

关 键 词：加筋板 载荷 联合载荷 侧压载荷 失效模式 模态分解 

分 类 号：U661.43[交通运输工程—船舶及航道工程]