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计及焊接变形的薄板对接焊缝疲劳热点应力分析

乐京霞1,谭润泽1,盛庆轲2,周恒3

乐京霞1,谭润泽1,盛庆轲2,周恒3. 计及焊接变形的薄板对接焊缝疲劳热点应力分析[J]. 焊接学报, 2018, 39(4): 49-52. DOI: 10.12073/j.hjxb.2018390094
引用本文: 乐京霞1,谭润泽1,盛庆轲2,周恒3. 计及焊接变形的薄板对接焊缝疲劳热点应力分析[J]. 焊接学报, 2018, 39(4): 49-52. DOI: 10.12073/j.hjxb.2018390094
YUE Jingxia1, TAN Runze1, SHENG Qingke2, ZHOU Heng3. Fatigue assessment of butt-weld joint in thin plate accounting for initial deformation[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(4): 49-52. DOI: 10.12073/j.hjxb.2018390094
Citation: YUE Jingxia1, TAN Runze1, SHENG Qingke2, ZHOU Heng3. Fatigue assessment of butt-weld joint in thin plate accounting for initial deformation[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(4): 49-52. DOI: 10.12073/j.hjxb.2018390094

计及焊接变形的薄板对接焊缝疲劳热点应力分析

Fatigue assessment of butt-weld joint in thin plate accounting for initial deformation

  • 摘要: 为减轻重量及降低能耗,超大型船舶的上层建筑开始尝试使用薄板焊接结构. 然而现行的各国船级社规范不允许使用小于5 mm的薄板,其主要原因是薄板焊接变形对结构疲劳强度的影响机理尚未明晰. 以某在建巨型豪华游轮上层建筑的甲板分段为研究对象,通过三维激光扫描该对接焊结构实体并获取整体焊接变形数据,采用高阶多项式拟合得到该结构的初始焊接变形,利用通用有限元程序ANSYS对计及焊接变形的结构进行建模分析,并获取了焊缝周围疲劳热点应力的分布;提出了更加接近真实薄板焊接变形的拟合方法;探讨了焊接变形对疲劳热点应力分布的影响.
    Abstract: To improve energy efficiency, structural lightweight has gained wide attention. For shipbuilding, thin welded structure is widely used as superstructure. Since the influence of welding deformation on the fatigue strength of thin welded structure is unknown, classification rules do not allow using plate with thickness smaller than 5 mm. Based on the case on a cruise ship deck, the initial welding deformation is fitted at multiple sections. The finite element software ANSYS 15.0 is used to obtain the strain and hotspot stress at the specified section. The results show that the effect of welding deformation on the fatigue strength of welded structures can be well evaluated.
  • [1] Lillem?e I, Remes H, Liinalampi S, et al. Influence of weld quality on the fatigue strength of thin normal and high strength steel butt joints[J]. Welding in the World, 2016, 60(4): 1-10.[2] Hobbacher A. Recommendations for fatigue design of welded joints and components[M]. New York: Welding Research Council, 2009.[3] 胡 浩, 梁 晋, 唐正宗, 等. 数字图像相关法测量金属薄板焊接的全场变形[J]. 光学精密工程, 2012, 20(7): 1636-1644.Hu Hao, Liang Jin, Tang Zhengzong, et al. Measurement of full-field deformations in metal sheet welding processes by image correlation method[J]. Optics and Precision Engineering, 2012, 20(7): 1636-1644.[4] 马 然. 基于结构应力法的铝合金十字接头疲劳性能研究[D]. 哈尔滨: 哈尔滨工业大学, 2015.[5] 胡会会, 王东坡, 吴良晨, 等. 中低强度钢超声冲击处理焊接接头热点应力设计曲线[J]. 焊接学报, 2016, 37(5): 124-128.Hu Huihui, Wang Dongpo, Wu Liangchen, et al. Hot spot stress design S-N curve of ultrasonic impact treated welded joints of medium and low strength steel[J]. Transactions of the China Welding Institution, 2016, 37(5): 124-128.[6] 刘 刚, 黄如旭, 黄 一. 复杂焊接接头多轴疲劳强度评估的等效热点应力法[J]. 焊接学报, 2012, 33(6): 10-14.Liu Gang, Huang Ruxu, Huang Yi. Equivalent hot spot stress approach for multiaxial fatigue strength assessment of complex welded joints[J]. Transactions of the China Welding Institution, 2012, 33(6): 10-14.[7] 彭 凡, 姚云建, 顾勇军. 热点应力法评定焊接接头疲劳强度的影响因素[J]. 焊接学报, 2010, 31(7): 83-86.Peng Fan, Yao Yunjian, Gu Yongjun. Influence factors of fatigue strength assessment for welded joints by hot spot stress approach[J]. Transactions of the China Welding Institution, 2010, 31(7): 83-86.[8] DNV. Fatigue Assessment of Ship Structures: No.30.7[S]. Det Norske, 2014.[9] 贾法勇, 霍立兴, 张玉凤, 等. 热点应力有限元分析的主要影响因素[J]. 焊接学报, 2003, 24(3): 27-30.Jia Fayong, Huo Lixing, Zhang Yufeng, et al. Key influence factors in hot spot stress FEM analysis[J]. Transactions of the China Welding Institution, 2003, 24(3): 27-30.
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  • 收稿日期:  2017-09-12

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