船舶复合材料加筋板屈曲和后屈曲行为研究  

Research on Buckling and Post Buckling Behavior of Composite Stiffened Panel for Ships

作　　者：李晓文 朱兆一 李妍 扈喆 LI Xiaowen;ZHU Zhaoyi;LI Yan;HU Zhe(School of Marine Engineering,Jimei University,Fujian Provincial Key Laboratory for Naval Architecture and Ocean Engineering,Xiamen 361021,China)

机构地区：[1]集美大学轮机工程学院,福建省船舶与海洋工程重点实验室,厦门361021

出　　处：《中国造船》2020年第3期186-194,共9页Shipbuilding of China

基　　金：国家自然科学基金(51909103);福建省自然科学基金(2018J05090,2018J05089,2018J01493)。

摘　　要：基于数值方法和有限元计算对船用复合材料加筋板进行特征值屈曲分析和非线性屈曲分析,探究危险载荷工况下加筋板的屈曲模态、临界屈曲载荷和后屈曲极限承载能力。考虑复合材料加筋板的基体失效、剪切失效和纤维失效,采用Hashin失效准则和动力显式分析方法进行非线性屈曲分析。分析结果表明:临界屈曲载荷、屈曲/后屈曲行为以及极限承载能力等与试验结果吻合较好,复合材料加筋板的极限承载能力约为临界屈曲载荷的5.4倍。通过参数化研究,分析了铺层角度、厚度以及加筋板间距对船舶复合材料加筋板屈曲和后屈曲行为的影响程度,为复合材料船体结构的力学行为评估、设计应用等提供一种有效参考。Composite materials are increasingly used in naval and civilian fields.It is of great significance to study the buckling and post buckling behavior of composite stiffened panel to ensure the safety and rationality of composite ship design.Based on the numerical method and the finite element calculation,eigenvalue buckling analysis and nonlinear buckling analysis were carried out for composite stiffened panels to explore buckling modes,critical buckling load and ultimate post buckling bearing capacity of stiffened plates under the dangerous loading condition.The matrix failure,shear failure and fiber failure of the stiffened composite panel were considered by using Hashin’s failure criterion and complete unloading failure model.The results show that the critical buckling load,buckling/post buckling behavior,and ultimate bearing capacity is in good agreement with the experimental results.The ultimate bearing capacity of the stiffened composite panel is about 5.4 times of the critical buckling load.Influence of stacking sequence,layer thickness and stiffener spacing of composite stiffened panel on buckling and post buckling behavior is predicted by a parametric study,which is useful for the mechanical behavior evaluation,design and application of composite ship structures.

关 键 词：屈曲 后屈曲 复合材料加筋板 极限承载 非线性 

分 类 号：U662.3[交通运输工程—船舶及航道工程]