轴向循环载荷下加筋板极限承载性能分析  

Analysis of ultimate load-bearing behavior of stiffened plate under axial cyclic loading

作　　者：崔虎威 丁启印 CUI Huwei;DING Qiyin(School of Shipping and Naval Architecture,Chongqing Jiaotong University,Chongqing 400074,China)

机构地区：[1]重庆交通大学航运与船舶工程学院,重庆400074

出　　处：《中国舰船研究》2022年第4期204-211,共8页Chinese Journal of Ship Research

基　　金：国家自然科学基金青年基金资助项目(52001040);重庆市教委科学技术研究项目(KJQN202000712);重庆市自然科学基金面上项目资助(cstc2021jcyj-msxmX0944);国家水运安全工程技术研究中心开放基金资助项目(A2021003)。

摘　　要：[目的]为提高船体加筋板极限承载性能非线性数值模拟的准确性,研究理想弹塑性、各向同性强化及循环塑性Chaboche材料模型对加筋板极限状态时的塑性屈服分布及压缩、拉伸极限强度的影响。[方法]针对某同一尺寸加筋板,采用ANSYS软件开展轴向循环压缩、循环压缩-拉伸载荷下的极限承载性能非线性有限元数值模拟。[结果]结果显示,不同的材料属性对加筋板极限承载性能及极限状态时的塑性屈服分布具有显著影响;在开展船体加筋板极限承载性能非线性有限元数值模拟时,需要根据不同的载荷形式选择恰当的材料模型。[结论]所得结果对进一步研究船体结构在循环载荷作用下的极限强度特性及累积塑性破坏机理具有一定的参考价值。[Objectives]In order to improve the accuracy of nonlinear numerical simulation of the ultimate load-bearing behavior of a hull stiffened plate,the effects of ideal elastoplastic,isotropic hardening and cyclic plastic Chaboche material models on the plastic yield distribution,compression and tensile ultimate strength of stiffened plates in their ultimate state are studied.[Methods]For a stiffened plate of the same size,ANSYS software is used to carried out non-linear finite element numerical simulation of ultimate bearing performance under axial cyclic compression and cyclic compression-tension loads.[Results]The results show that different material properties have a significant impact on the ultimate bearing capacity of stiffened plates and the plastic yield distribution in the ultimate state.When carrying out nonlinear finite element numerical simulation of the ultimate bearing behavior of a hull stiffened plate,it is necessary to select the appropriate material model according to different load forms.[Conclusions]The results of this study can provide valuable references for further research on the ultimate strength characteristics and cumulative plastic failure mechanisms of hull structures under cyclic loading.

关 键 词：循环载荷 加筋板 循环塑性 极限强度 

分 类 号：U661.43[交通运输工程—船舶及航道工程]