Numerical Simulation Study on Welding Process of Upper Frame of Hydropower Unit

被引：1

作者：

Yu, Chenlei ^{[1
]}

Pan, Jun ^{[1
]}

Han, Junzhao ^{[1
]}

Ma, Jianfeng ^{[1
]}

Zhang, Weiliang ^{[1
]}

机构：

[1] Zhejiang Sci Tech Univ, Natl & Local Joint Engn Res Ctr Reliabil Anal & Te, Hangzhou 310018, Peoples R China

来源：

APPLIED SCIENCES-BASEL | 2024年 / 14卷 / 10期

关键词：

upper frame of hydropower unit; numerical simulation; thermal elastic-plastic method; inherent strain method; welding process research; RESIDUAL-STRESS; INHERENT STRAIN; DEFORMATION; DISTORTION; STEEL; JOINT;

D O I：

10.3390/app14104268

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

To optimize the welding process of the upper frame of the hydropower unit, a thermal elastic-plastic (TEP) finite element model of the typical T-joint of the upper frame was established, and the effectiveness and accuracy of the model were verified by welding tests. The effect of welding speed and interlayer cooling time on welding residual stress and deformation was analyzed, and a welding process in line with the requirements was obtained. Based on the results of the TEP calculation, the inherent strain was obtained, and the inherent strain method (ISM) was used to predict the overall deformation of the upper frame under three welding sequence schemes, and the optimal welding sequence was obtained.

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页数：21

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