米大为,沈天阔,宿希慧,等.核电站控制棒驱动机构Canopy焊缝焊接温度场和应力-应变场模拟[J].精密成形工程,2024,16(2):182-189.
MI Dawei,SHEN Tiankuo,SU Xihui,et al.Simulation of Welding Temperature Field and Stress-Strain Field of Canopy Welded Seam in Control Rod Drive Mechanism of Nuclear Power Plant[J].Journal of Netshape Forming Engineering,2024,16(2):182-189. |
| 核电站控制棒驱动机构Canopy焊缝焊接温度场和应力-应变场模拟 |
| Simulation of Welding Temperature Field and Stress-Strain Field of Canopy Welded Seam in Control Rod Drive Mechanism of Nuclear Power Plant |
| 投稿时间：2023-11-02 |
| DOI：10.3969/j.issn.1674-6457.2024.02.022 |
| 中文关键词: 焊接模拟 焊接温度场 焊接应力 焊接变形 Canopy焊缝 |
| 英文关键词: welding simulation welding temperature field welding stress welding deformation Canopy welded seam |
| 基金项目:江苏省博士后科研资助计划(1601048C) |
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| 中文摘要: |
| 目的 研究机加工和拉拔2种成形方式下得到的填充环对Canopy焊缝的影响，获取焊接焊缝成形、焊接残余应力和变形的相关数据，以指导Canopy焊缝焊接工艺。方法 采用数值模拟的方法，建立Canopy焊缝焊接数值分析模型，模拟焊接温度场、焊接残余应力和焊接残余变形。结果 拉拔成形环焊接熔池高度为9 mm，机加工成形环焊接熔池高度为8.3 mm;机加工成形环焊接最大残余应力为255.6 MPa，而拉拔成形环焊接最大残余应力为277.8 MPa，均出现在管座紧贴焊缝的位置;机加工成形环焊接残余变形为0.19 mm，拉拔成形环焊接残余变形为0.186 mm，最大残余变形均出现在焊接起始位置附近，在焊缝与管座交接的位置。结论 熔池形貌直接影响了热影响区域的大小，拉拔Y型环焊接熔池高度更大，焊接的热影响区域更大;拉拔Y型环焊接残余应力略大于机加工Y型环焊接残余应力;机加工成形环和拉拔成形环焊接残余变形相近。 |
| 英文摘要: |
| The work aims to study the effect of filler rings formed by machining and drawing on the Canopy welded seam and obtain the relevant data on welded seam formation, welding residual stress, and deformation to guide the welding of Canopy welded seams. The numerical simulation was used to establish a numerical analysis model for the welding of Canopy welded seams, simulating the welding temperature field, welding residual stress, and welding residual deformation. The height of the fusion zone for drawn rings was 9 mm, and that for machined rings was 8.3 mm. The maximum residual stress for machined rings was 255.6 MPa, while that for drawn rings was 277.8 MPa, both occurring at the location where the tube support was closely attached to the welded seam. The welding residual deformation for machined rings was 0.19 mm, and that for drawn rings was 0.186 mm. The maximum residual deformation occurred near the welding starting position, i.e. at the junction of the welded seam and the tube support. The morphology of the fusion zone directly affects the size of the heat-affected zone. The height of the fusion zone for drawn Y-shaped rings is larger, and the heat-affected zone of the welding is larger. The welding residual stress for drawn Y-shaped rings is slightly greater than that for machined Y-shaped rings. The welding residual deformation of machined and drawn rings is similar. |
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