中国舰船研究2024，Vol.19Issue(6)：248-256,9.DOI:10.19693/j.issn.1673-3185.03476
焊接初始缺陷对船体梁极限强度的影响
Effect of welding initial imperfections on the ultimate strength of hull girder
摘要
Abstract
[Objectives]The aim of this paper is to evaluate the longitudinal ultimate strength of a hull girder more accurately and determine its collapse process.[Methods]A bulk carrier is finely modeled in nonlinear finite element software ABAQUS,and the effects of slight,average,and severe welding initial de-formations and average welding residual stress on the ultimate strength of the hull girder under hogging and sagging bending moments are fully considered.[Results]The calculation results show that the hull girder's ultimate strength and bending stiffness decrease gradually with the increase of the initial deformation amp-litude.Severe welding initial deformation makes the ultimate strength of the bulk carrier decrease by 14.25%,and the bulk carrier's ultimate strength decreases by up to 8.22%under the effect of welding residual stress in-dividually.The combined effect of welding initial deformation and residual stress on the hull girder's ultimate strength is not a linear combination of the effects of the two initial deformations individually.[Conclusions]The combined effect of welding initial deformation and residual stress on a hull girder's ultimate strength should be considered more carefully in research on the ultimate strength of hull girders.关键词
船体梁/结构分析/极限强度/焊接初始变形/焊接残余应力/有限元法/ABAQUSKey words
hull girders/structural analysis/ultimate strength/welding initial deformation/welding resid-ual stress/finite element method/ABAQUS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..焊接初始缺陷对船体梁极限强度的影响[J].中国舰船研究,2024,19(6):248-256,9.基金项目
国家自然科学基金青年科学基金资助项目(52001040) （52001040）
重庆市自然科学基金面上项目资助(cstc2021jcyj-msxmX0944) （cstc2021jcyj-msxmX0944）
重庆市教委科学研究青年项目资助(KJQN202000712) （KJQN202000712）
内河航运技术湖北省重点实验室开放基金资助项目(NHHY2021004) （NHHY2021004）
重庆市研究生科研创新项目(2023S0077) （2023S0077）
