基于局部-整体有限元法的薄壁筒焊接变形计算

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清华大学辅仁网/2017-07-07

赵海燕¹, 吴骏巍¹, 陆向明², 简波², 李宏伟²

1. 清华大学机械工程系, 北京 100084;
2. 北京特种机械研究所, 北京 100143

Welding deformation predictions of thin-wall cylinders using a local-global method

ZHAO Haiyan¹, WU Junwei¹, LU Xiangming², JIAN Bo², LI Hongwei²

1. Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China;
2. Beijing Institute of Specialized Machinery, Beijing 100143, China

摘要:

输出: BibTeX | EndNote (RIS)

摘要焊接变形会对焊接件的应用造成很大影响，进行结构件焊接变形的高精度和高效率预测具有重要的工程意义。该文针对大型薄壁圆筒件，应用局部-整体映射法对其环焊缝的焊接过程进行了有限元分析，得到了3种不同焊接顺序下的筒体变形结果。计算结果表明：相比于环缝一段焊和环缝两段焊，对环缝分成四段焊接情况下圆筒变形量最小，其数值相比于环缝一段焊减少约17%。将局部-整体法计算结果与热弹塑性法和实验方法所得结果进行了对比，三者吻合较好，但局部-整体法的计算用时仅为热弹塑性法的约1/6。

关键词 ：焊接变形,有限元分析,局部-整体方法,薄壁筒

Abstract：Welding structure can be seriously affected by welding deformation. Accurate, efficient predictions of welding deformation are important in engineering projects. A local-global finite element analysis is used to analyze circumferential welding of large-scale thin-wall cylinders. The welding deformation of the cylinder is obtained in 3 sequences. The results show that the deformation of a 1/4 circle weld is less than for a full-circle weld and a 1/2 circle weld. The deformation of a 1/4 circle weld is about 17% less than for a full-circle weld. The local-global method results agree well with results from the thermo-elastic-plastic method and experimental data with the local-global method using about 1/6 of the time of the thermo-elastic-plastic method.

Key words：welding deformation finite element analysis local-global method thin-wall cylinder

收稿日期: 2016-07-26 出版日期: 2017-05-20

ZTFLH:

TG404

引用本文:

赵海燕, 吴骏巍, 陆向明, 简波, 李宏伟. 基于局部-整体有限元法的薄壁筒焊接变形计算[J]. 清华大学学报（自然科学版）, 2017, 57(5): 449-453.
ZHAO Haiyan, WU Junwei, LU Xiangming, JIAN Bo, LI Hongwei. Welding deformation predictions of thin-wall cylinders using a local-global method. Journal of Tsinghua University(Science and Technology), 2017, 57(5): 449-453.

链接本文:

http://jst.tsinghuajournals.com/CN/10.16511/j.cnki.qhdxxb.2017.22.019或 http://jst.tsinghuajournals.com/CN/Y2017/V57/I5/449

图表:

图1 X5CrNi1810材料参数

图2 局部整体有限元法技术路线

表1 局部整体法与热弹塑性法计算时间对比

表2 热源模型参数

图3 热源校核所得熔池形貌与试样对比

图4 局部模型网格划分及边界条件

图5 薄壁筒整体网格模型

图6 局部整体法与热弹塑性法计算结果对比

图7 局部整体法计算结果与实验数据对比

图8 环焊缝3种焊接方案

图9 3种焊接方案下直径变化量对比

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