压力容器主管道分段焊接变形的数值模拟研究

庾明达; 张丽屏; 邵雪娇; 姜露; 李辉; 刘贞谷; 蒲卓

doi:10.13832/j.jnpe.2022.S2.0165

压力容器主管道分段焊接变形的数值模拟研究

doi: 10.13832/j.jnpe.2022.S2.0165

中国核动力研究设计院核反应堆系统设计技术重点实验室，成都，610213

基金项目: 国家自然科学基金（51606180；11872060）

详细信息

作者简介:
庾明达（1994—），男，工程师，现从事反应堆结构分析研究工作，E-mail: 1813049599@qq.com

中图分类号: TL351.6；TG404
计量
- 文章访问数: 124
- HTML全文浏览量: 36
- PDF下载量: 19
- 被引次数: 0
出版历程
- 收稿日期: 2022-07-20
- 修回日期: 2022-08-30
- 刊出日期: 2022-12-31

Numerical Simulation Study on Segmented Welding Deformation of Main Pipe of Pressure Vessel

Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu, 610213, China

摘要

摘要: 针对压力容器主管道焊接径向位移过大的问题，采用SYSWELD软件对主管道多层多道焊接进行了数值模拟分析，并研究了3种分段式焊接方案对焊接残余应力和变形的影响。结果表明，计算结果与实验结果较为吻合，验证了数值手段的合理性，采用分段式焊接可有效地降低压力容器主管道焊接过程的径向位移和残余应力，在所研究的３种分段式研究方案中，分段式上下单边焊接方案对焊接径向位移的抑制效果最好。
- 主管道 /
- 多层多道焊 /
- 径向变形 /
- 位移抑制
Abstract: For the excessive radial deformation problem of the reactor pressure vessel during the welding process, based on SYSWELD, the numerical simulation analysis of the multi-pass welding of a main pipe is conducted, and the effects of three sub-sectional welding schemes on the welding residual stresses and welding deformation are investigated. The results show that, the numerical results are in good agreements in the experimental data, so the numerical approach involved is validated. The sub-sectional schemes can effectively reduce the radial displacements of the pressure vessel main pipe during the welding process. Among the three welding schemes, the sub-sectional up-to-down single-side scheme shows the best effect on the welding radial deformation suppression.
- Main pipe /
- Multi-layer and multi-pass welding /
- Radial deformation /
- Displacement suppression

HTML全文

图 1 几何结构示意图

Figure 1. Schematic Diagram of Geometric Structure

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图 2 网格无关性验证

Figure 2. Mesh-independent Validation

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图 3 有限元模型

Figure 3. Finite Element Model

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图 4 热源校核结果

Figure 4. Heat Source Check Results

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图 5 焊接方案示意图

Figure 5. Schematic Diagram of Welding Scheme

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图 6 原始方案位移量

Figure 6. Displacements of Original Scheme

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图 7 原始方案收缩量

Figure 7. Shrinkage of Original Scheme

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图 8 原始方案的残余应力分布

Figure 8. Residual Stress Distribution of Original Scheme

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图 9 3种方案的焊接残余应力分布

Figure 9. Welding Residual Stress Distribution of Three Schemes　　　　　　

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图 10 焊接过程的位移

Figure 10. Displacement during Welding

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图 11 焊接完成后的径向变形

Figure 11. Radial Deformation after Welding

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