Prediction on the Welding Distortion During Full-cycle Manufacturing of Nuclear Power Key Structures based on Digital Twins

ZHENG Wenjian; FENG Daochen; LI Renhou; YANG Jianguo

doi:10.7512/j.issn.1001-2303.2024.08.01

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Prediction on the Welding Distortion During Full-cycle Manufacturing of Nuclear Power Key Structures based on Digital Twins
Vol. 54, Issue 8, Pages: 1-7(2024)
Published： 25 August 2024 ，
DOI： 10.7512/j.issn.1001-2303.2024.08.01
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郑文健，冯道臣，李仁厚，等.基于数字孪生的核电关键结构全周期制造焊接变形预测［J］.电焊机，2024，54（8）：1-7.

ZHENG Wenjian, FENG Daochen, LI Renhou, et al.Prediction on the Welding Distortion During Full-cycle Manufacturing of Nuclear Power Key Structures based on Digital Twins[J].Electric Welding Machine, 2024, 54(8): 1-7.
郑文健，冯道臣，李仁厚，等.基于数字孪生的核电关键结构全周期制造焊接变形预测［J］.电焊机，2024，54（8）：1-7. DOI： 10.7512/j.issn.1001-2303.2024.08.01.

ZHENG Wenjian, FENG Daochen, LI Renhou, et al.Prediction on the Welding Distortion During Full-cycle Manufacturing of Nuclear Power Key Structures based on Digital Twins[J].Electric Welding Machine, 2024, 54(8): 1-7. DOI： 10.7512/j.issn.1001-2303.2024.08.01.

摘要

基于数值模拟方法精确预测大型复杂焊接结构制造过程的变形一直是焊接工程领域的难点。而具备数化—虚拟模型，互动—虚拟现实信息交互，先觉—现实数据背后隐藏知识，先知—精确预测四大特征的数字孪生技术，具备更高维度处理焊接工程问题的能力，且其范畴涵盖数值模拟方法，因而可在超大型复杂焊接结构变形控制中予以借鉴。文中以四代核电关键结构堆顶固定屏蔽结构为研究对象，制定基于数字孪生的技术路线。通过焊接制造试验及数值模拟等方法研究相关结构焊接变形量及规律，实现数字孪生四大特征，最终达到定量预测实际堆顶固定屏蔽结构的焊接变形的目的，为其结构设计优化及焊接变形控制措施提供理论及试验基础。结果表明，堆顶固定屏蔽实际结构制造的实际焊接变形与数字孪生技术预测结果达到毫米级定量吻合，证明数字孪生技术可降低基于数值模拟方法预测超大型焊接结构变形的不确定性，进一步提升变形预测精度。

Abstract

Accurate prediction on the welding distortion of large and complex structure manufacture is always hard in the welding engineering. Digital twin (DT) technology which is characterized by a digital-virtual model

interaction through virtual reality information

perception of hidden knowledge behind real data

and accurate prediction

possess the ability to deal with welding engineering problem in high dimension along with the numerical simulation method. Therefore

DT could be used to control the welding distortion of the big scaled and complex welding structure. In this study

a shielding structure on the top of the nuclear power plant was investigated by developing technical route based on the DT technology. The welding distortion with its distribution mechanism were studied by conducting welding manufacturing experiment and simulation which used to match the DT characteristics

to precisely predict the welding distortion of the shielding structure on the top of the nuclear power plant

and support the experimental and theoretical basement for optimizing structure design and controlling distortion. The study shows the result that the welding distortion of the shielding structure on the top of the nuclear power plant is in mm grade of agreement with that obtained by DT technology. It is also demonstrated that using DT technology could obviously decrease the uncertainty of numerical simulation in predicting the welding distortion of large scale structure and improve the precision of prediction.

关键词

数字孪生大尺寸核电结构数值模拟焊接变形

Keywords

digital twinslarge scale nuclear structurenumerical simulationwelding distortion

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