摘要
随着模块化造船的发展和焊接工艺水平的提高,总段合拢的方式正逐步从传统的"阶梯式"转变为"一刀齐"方式。文章运用ANSYS软件对焊接温度场和应力场进行间接耦合,对不同对接工艺下的船舶纵骨的残余应力分布进行数值模拟,得到相应的残余应力的分布规律;并把数值模拟得到的残余应力作为初始荷载施加到典型纵骨结构上进行极限承载力计算。通过对不同对接形式的纵骨结构的数值模拟和试验研究表明,不同对接形式下焊接残余应力的分布差别较大,对结构的极限强度有一定的影响,为后续的相关研究提供了可靠的依据。
With the development of modular technology and welding procedure, the fold way of ship block has gradually changed from the ‘step joint’ to the ‘in-plane welded connection’. In this paper, the cou-pling between the welding temperature field and stress field are simulated, and the distributions of the resid-ual stress are obtained under different welding techniques. The results of the residual stress apply to the typical longitudinal to derive the ultimate strength. By analyzing the simulated results and the experiments, the distributions of residual stress are very different under different welding techniques, and the structural ultimate strength is affected. The result provides the reliable basis for follow-up study.
出处
《船舶力学》
EI
CSCD
北大核心
2014年第4期441-447,共7页
Journal of Ship Mechanics
基金
江苏省船舶先进设计制造技术重点实验室开放研究基金(CJ1202)
江苏省绿色船舶技术重点实验室资助
关键词
一刀齐
对接焊工艺
焊接残余应力
数值模拟
极限强度
in-plane welded connection
welding process
welding residual stress
numerical simulation
ultimate strength
