中国舰船研究2023，Vol.18Issue(6)：208-215,8.DOI:10.19693/j.issn.1673-3185.03081
环形加筋圆柱壳的焊接残余应力及振动特性研究
Investigation on welding residual stress and vibration characteristics of ring-stiffened cylindrical shell
王江超 1陈相飞 2牛业兴 2杜仕忠 2申超男3
作者信息
- 1. 华中科技大学 船舶与海洋工程学院,湖北 武汉 430074||高新船舶与深海开发装备协同创新中心,上海 200240
- 2. 上海振华重工启东海洋工程股份有限公司,江苏 南通 226200
- 3. 华中科技大学 船舶与海洋工程学院,湖北 武汉 430074
- 折叠
摘要
Abstract
[Objective]This study investigates complex welding residual stress and its effect on the vibra-tion characteristics of a ring-stiffened cylindrical shell.[Methods]Fusion welding with carbon dioxide as the shield gas is employed to finish the welding of a ring-stiffened cylindrical shell.The non-destructive X-ray diffraction(XRD)approach is used to measure the longitudinal residual stress of critical regions after welding and annealing heat treatment.Effective thermal elastic-plastic finite element(FE)computation is then used to examine the temperature and welding residual stress during welding,as well as considering the influence of the moving body heat source and fixed heat source on welding computation.Under the state of freedom,the vibra-tion characteristics of the examined ring-stiffened cylindrical shell after welding and annealing heat treatment are measured,and the vibration modes and corresponding natural frequency are both predicted with FE analys-is.[Results]Based on experimental measurement,thermal elastic-plastic FE computation measurement dur-ing welding and structural vibration is carried out,and the residual stress and vibration characteristics of the ring-stiffened cylindrical shell after welding and annealing heat treatment are obtained.[Conclusions]A fixed heat source can effectively predict the thermal and mechanical response during the welding of a ring-stiffened cylindrical shell,and the predicted welding residual stress shows good agreement with the measure-ments.Annealing heat treatment can significantly reduce welding residual stress and lower its influence on the vibration characteristics of a ring-stiffened cylindrical shell.关键词
环肋圆柱壳/热-弹-塑性有限元计算/焊接残余应力/振动特性/退火热处理Key words
ring-stiffened cylindrical shell/thermal elastic-plastic FE computation/welding residual stress/vibration characteristics/annealing heat treatment分类
交通工程引用本文复制引用
王江超,陈相飞,牛业兴,杜仕忠,申超男..环形加筋圆柱壳的焊接残余应力及振动特性研究[J].中国舰船研究,2023,18(6):208-215,8.
