冲压成型过程对焊接空心球节点力学性能影响研究
引用文献：
刘红波 高昊天 陈志华 邱灿. 冲压成型过程对焊接空心球节点力学性能影响研究[J]. 建筑结构，2023，48（03）：103-108.
LIU Hongbo GAO Haotian CHEN Zhihua QIU Can. Study on influence of stamping and forming process on mechanical properties of welded hollow spherical joints[J]. Building Structure，2023,48（03）：103-108.
摘要：焊接空心球节点在制作和焊接过程中，会引起壁厚减薄率和焊接残余应力等初始缺陷，从而导致节点的力学性能的明显变化。采用有限元数值模拟方法，研究了焊接空心球节点制作和焊接过程中，壁厚减薄率和焊接残余应力的形成机理，研究了其对焊接空心球节点极限承载力的影响规律，发现壁厚减薄率和焊接残余应力对节点力学性能有较为显著的影响，建议在今后设计时适当考虑。
关键词：焊接空心球节点；冲压过程；焊接残余应力；壁厚减薄率；极限承载力；
基金：国家自然科学基金面上项目(51878443)。
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[2] HAN Q H,LIU X L.Ultimate bearing capacity of the welded hollow spherical joints in spatial reticulated structures[J].Engineering Structures,2004,26(1):73-82.
[3] 董石麟，邢丽，赵阳，等.方钢管焊接空心球节点的承载力与实用计算方法研究[J].建筑结构学报，2005,26(6):27-37.
[4] LIU H B,YING J J,CHEN Z H,et al.Ultimate tensile and compressive performances of welded hollow spherical joints with H-beam[J].Journal of Constructional Steel Research,2018,150:195-208.
[5] 袁志军，扶名福.球管焊接节点焊接残余应力影响因素研究[J].中国机械工程，2011,22(7):808-812.
[6] 王飞，田少杰，雷宏刚.残余应力对钢管-焊接空心球节点疲劳强度的影响分析[J].建筑结构，2018,48(S1):456-460.
[7] 施刚，姜雪，周文静，等.焊接圆钢管残余应力试验研究[J].建筑结构学报，2014,35(11):125-133.
[8] 李洋，雷宏刚.基于盲孔法的网架焊接空心球节点球面焊趾处残余应力测试[J].科学技术与工程，2020,20(7):2816-2822.
[9] 郝潇逸，雷宏刚，张建丽，等.球面咬边缺陷对焊接空心球节点应力集中影响的有限元分析[J].中国科技论文，2018,13(13):1494-1499.
[10] 张建丽，雷宏刚.焊接空心球节点钢管焊趾处应力集中试验研究与有限元分析[J].太原理工大学学报，2019,50(1):119-124.
Study on influence of stamping and forming process on mechanical properties of welded hollow spherical joints
Abstract: In the manufacture and welding process of welded hollow spherical joints(WHSJs), initial imperfection such as wall thickness reduction and welded residual stress will be caused, which will lead to obvious changes in mechanical properties of joints. The formation mechanism and influence on the ultimate bearing capacity of wall thickness reduction and welded residual stress caused by manufacture and welding process of WHSJs was studied by using the finite element analysis method. The results show that the wall thickness reduction and welded residual stress have significant effects on the mechanical properties of WHSJs, which should be considered properly in the future design.
Keywords: welded hollow spherical joint; stamping process; residual stress; wall thickness reduction; ultimate bearing capacity
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