摘要
针对船舶建造合拢过程中出现焊接间隙超差的问题,基于SYSWELD焊接仿真分析软件,提出了适用于模拟大焊缝间隙超差情况下中厚板多层多道焊产生的变形场的热-弹-塑性非线性有限元数值计算方法.通过建立三维有限元模型和采用平均热循环曲线取代瞬态移动热源对焊缝进行加载的方法,对船体大焊缝间隙对接焊接横向收缩变形进行了数值模拟,并通过实际试验对板材焊接接头的横向收缩变形进行了测量,对比发现,实测变形结果与由数值模拟得出的横向收缩变形数值基本一致,验证了此数值模拟方法的准确性和有效性,为实现精度造船提供了理论基础.
Aiming at the problem that the welding gap does not satisfy the standard in the process of shipbuilding, a thermal-elastic-plastic nonlinear finite element numerical calculation method is put forward based on the SYSWELD, which is applicable for simulating the deformation field of plate with multi-layer and multi-line welding under the condition of large welding gap. By establishing a three-dimensional finite element model and replacing the transient heat with the average thermal cycle curve to load the weld, numerical simulations are carried out to investigate the effects of big welding gap on the hull butt welding transverse shrinkage deformation. In addition, through the actual test, the transverse deformation is measured. By comparing the measured value with the calculated value, it is found that they are almost the same, which verifies the accuracy and effectiveness of the numerical simulation method, and provides a theoretical basis for the realization of the precision shipbuilding.
出处
《武汉理工大学学报（交通科学与工程版）》
2017年第2期355-358,共4页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
湖南省内河液货船标准船优化项目资助(103-6114141281)
关键词
大焊缝间隙
多层多道焊
平均热循环曲线
横向收缩变形
数值模拟
big welding gap
multi-layer weld
average thermal cycle curve
transverse shrinkage deformation
numerical simulation
