Welding Residual Stress Distribution of Heat Transfer Tube Inner Wall of Tube-to-Tubesheet Joint in Nuclear Steam Generator
摘 要
采用自行搭建的管道内壁残余应力测试平台,通过切割法测得核电蒸汽发生器传热管/管板接头传热管内壁的焊接残余应力,结合有限元模拟,研究了传热管内壁焊接残余应力的分布规律。结果表明:试验测得传热管/管板接头中传热管内壁近焊缝处的轴向和周向残余应力均为拉应力,随着距焊缝中心线距离的增加,残余拉应力减小并变为压应力,在距离焊缝中心线12 mm处,残余压应力最大,在距离焊缝中心线21 mm处残余应力减小至焊前初始应力;传热管内壁焊接残余应力分布的模拟结果和试验结果基本吻合,该有限元模型可以准确模拟核电蒸汽发生器传热管/管板接头传热管内壁焊接残余应力的分布规律。
Abstract
The welding residual stress on heat transfer tube inner wall of tube-to-tubesheet joint in nuclear steam generator was measured by cutting method with a self-built test platform for measuring the residual stress on the inner wall of the tube. The welding residual stress distribution on the heat transfer tube inner wall was studied by combining with finite element simulation. The results show that both tested axial and circumferential residual stresses near the weld of heat transfer tube inner wall of tube-to-tubesheet joint were tensile stresses. With the increase of distance from the weld center line, the residual tensile stress decreased and then changed to compressive stress. At the distance of 12 mm from the weld center line, the residual compressive stress was the largest, and at the distance of 21 mm from the weld center line, the residual stress decreased to the initial stress before welding. The simulation results of welding residual stress distribution on heat transfer tube inner wall were basically in agreement with the experimental results, indicating that the finite element model could accurately simulate the welding residual stress distribution on heat transfer tube inner wall of tube-to-tubesheet joint in nuclear steam generator.
中图分类号 TG404 DOI 10.11973/jxgccl201901017
所属栏目 物理模拟与数值模拟
基金项目 国家自然科学基金资助项目(51275006)
收稿日期 2017/12/15
修改稿日期 2018/12/15
网络出版日期
作者单位点击查看
备注李明(1993-),男,湖北荆门人,硕士研究生
引用该论文: LI Ming,LIN Jian,LEI Yongping,LIU Xiaojia,LU Li. Welding Residual Stress Distribution of Heat Transfer Tube Inner Wall of Tube-to-Tubesheet Joint in Nuclear Steam Generator[J]. Materials for mechancial engineering, 2019, 43(1): 82~86
李明,林健,雷永平,刘晓佳,鲁立. 核电蒸汽发生器传热管/管板接头传热管内壁的焊接残余应力分布[J]. 机械工程材料, 2019, 43(1): 82~86
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参考文献
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【3】NA M G, SIM Y R, LEE Y J. Design of an adaptive predictive controller for steam generators[J]. IEEE Transactions on Nuclear Science, 2003, 50(1):186-193.
【4】迟露鑫,麻永林,邢淑清,等. 核电SA508-3钢厚壁圆筒纵向焊接残余应力分析[J]. 焊接学报, 2012, 33(6):59-62.
【5】GHOSH S, RANA V P S, KAIN V, et al. Role of residual stresses induced by industrial fabrication on stress corrosion cracking susceptibility of austenitic stainless steel[J]. Materials and Design, 2011, 32(7):3823-3831.
【6】DIERCKS D R, SHACK W J, MUSCARA J. Overview of steam generator tube degradation and integrity issues[J]. Nuclear Engineering and Design, 1999, 194(1):19-30.
【7】KRAUTSCHNEIDER R, JOCH L. Decreasing thermal stresses in steam generator collector weld's area using external cooling[J]. Procedia Materials Science, 2016, 12:12-17.
【8】雷永平,韩丰娟,夏志东,等. 陶瓷-金属钎焊接头残余应力的数值分析[J]. 焊接学报. 2003,24(5):33-36.
【9】廖娟,凌泽民,彭小洋. 考虑相变的铝合金管焊接残余应力数值模拟[J]. 材料工程, 2013(4):34-38.
【10】施苏晋. 核电蒸汽发生器管板焊接残余应力分布规律研究[D]. 广州:华南理工大学, 2015.
【11】RYBICHI E F, STONESIFER R B. Computation of residual stresses due to multi-pass welds in piping system[J]. Journal of Pressure Vessel Technology, 1979, 101(5):11-16.
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