在循环载荷下扶强材极限强度的数值分析与试验验证  

Numerical analysis and experimental verification of the ultimate strength of stiffeners under cyclic loading

作　　者：吴剑国[1] 申屠晨楠 何梦翔 叶帆 傅何琪 WU Jianguo;SHENTU Chennan;HE Mengxiang;YE Fan;FU Heqi(College of Civil Engineering,Zhejiang University of Technology,Hangzhou 310023,China;Marine Design&ResearchInstitute of China,Shanghai 200011,China)

机构地区：[1]浙江工业大学土木工程学院,浙江杭州310023 [2]中国船舶及海洋工程设计研究院,上海200011

出　　处：《浙江工业大学学报》2022年第2期198-202,215,共6页Journal of Zhejiang University of Technology

摘　　要：为了研究循环载荷作用对扶强材极限强度的影响,进行了在3种加载机制下7组扶强材试件的极限强度试验。采用Abaqus非线性有限元软件计算,引入钢材材料损伤,对试验进行了数值模拟分析,探讨了材料损伤参数取值对模型极限承能力的影响。有限元与试验结果表明:当扶强材超过最大承载力后继续循环加载,其承载力退化明显,平均下降10%;引入钢材材料损伤后的有限元模拟结果更符合试验结果,平均差值为3%,数值模拟结果与试验结果较为吻合。In order to study the influence of cyclic loading on the ultimate strength of stiffeners,a ultimate strength test of seven stiffener specimens under three loading mechanisms is carried out.By introducing the material damage of steel,the software Abaqus is used to simulate numerically the test.The influence of material damage parameter on the ultimate bearing capacity of the model is discussed.The finite element analysis and test results show that when the stiffener is still loaded after the maximum stress,the bearing capacity is significantly decreased by around 10%.After the material damage of steel is introduced,the simulation results are in better agreement with the test results,with an average relative error of 3%.The numerical simulation results agree well with the experimental results.

关 键 词：扶强材 极限承载力 循环载荷 材料损伤 

分 类 号：U668.1[交通运输工程—船舶及航道工程]