中国舰船研究2025，Vol.20Issue(3)：174-183,10.DOI:10.19693/j.issn.1673-3185.03595
循环弯矩下考虑弹性安定特性的某散货船极限强度分析
Analysis of ultimate strength of bulk carrier considering elastic shakedown under cyclic bending moment
摘要
Abstract
[Objectives]In order to accurately evaluate the longitudinal ultimate strength of a hull girder un-der the cyclic bending moment,the effects of an elastic-perfectly plastic and Chaboche material model on the elastic shakedown and ultimate strength of the hull girder under the cyclic bending moment are studied.[Methods]The nonlinear finite element method is used to carry out the ultimate strength numerical simula-tion of a double bottom bulk carrier considering the elastic shakedown under the cyclic bending moment.In this study,the Bauschinger effect of the material during the reverse loading of the structure and influence of the welding initial deformation and residual stress are considered.[Results]The calculation results show that the welding initial deformation significantly reduces the lower limit of the elastic shakedown of bulk carri-er,and the range of the elastic shakedown considering welding initial deformation and residual stress is the largest.After reaching the elastic shakedown under the cyclic bending moment,the ultimate strength of the bulk carrier considering the welding initial deformation and residual stress under hogging and sagging states are 7.15%and 5.68%higher than that under single loading respectively.[Conclusions]The welding initial deformation has a major impact on the elastic shakedown interval and elastic shakedown ultimate strength of the bulk carrier,which should be carefully considered in actual research and analysis.关键词
极限强度/船体梁/弯矩/弹性安定/焊接/焊接初始变形/焊接残余应力Key words
ultimate strength/hull girders/bending moments/elastic shakedown/welding/welding ini-tial deformation/welding residual stress分类
交通工程引用本文复制引用
崔虎威,胡润文,陈泽民,黄路..循环弯矩下考虑弹性安定特性的某散货船极限强度分析[J].中国舰船研究,2025,20(3):174-183,10.基金项目
国家自然科学基金资助项目(52001040) （52001040）
重庆市自然科学基金面上项目资助(cstc2021jcyj-msxmX0944) （cstc2021jcyj-msxmX0944）
重庆市教委科学技术研究重点项目资助(KJZD-K202300710) （KJZD-K202300710）
重庆市研究生导师团队建设项目资助(JDDSTD2022009) （JDDSTD2022009）
