Study on Fatigue Performance of Local Dense Weld Structures of Ship Hulls
-
摘要: 针对船体局部结构密集焊缝的疲劳问题,通过模拟实际服役环境,开展两种局部密集焊缝结构的工程型疲劳试验和结构应力仿真计算,并提出改善密集焊缝结构疲劳性能的方法。研究结果表明:海水腐蚀环境下,随着相邻焊缝间距的减少,结构峰值应力增大,密集焊缝结构的疲劳寿命降低;当相邻焊缝距离较近不可避免时,采用堆焊熔修处理可有效提高其疲劳性能。Abstract: To solve the fatigue problem of the dense welds of the local hull structures, by simulating the actual service environment, the engineering fatigue tests and structural stress simulation calculation are carried out on two types of local dense weld structures, and the methods to improve the fatigue performance of the dense weld structures are proposed. It is concluded that under the seawater corrosion environment, as the distance between the adjacent welds decreases, the peak stress of the structure increases, and the fatigue life of the dense weld structures decreases. When the distance between the adjacent welds is small, the surfacing and repair welding methods can effectively improve their fatigue performances.
-
-
[1] PAQUET D, LANTEIGNE J, BERNARD M, et al. Characterizing the effect of residual stresses on high cycle fatigue (HCF) with induction heating treated stainless steel specimens[J]. International Journal of Fatigue, 2014, 59: 90-101.
[2] 卞如冈, 崔维成, 万正权, 等. 焊接残余应力对疲劳寿命影响的定量研究[J]. 船舶力学, 2011, 15(7): 776-783. [3] 张晓飞, 李良碧, 李永正. AH32钢T型焊接接头疲劳强度的试验与数值模拟[J]. 舰船科学技术, 2013, 35(6): 57-60. [4] WILLIAMS J J, DENG X, CHAWLA N. Effect of residual surface stress on the fatigue behavior of a low-alloy powder metallurgy steel[J]. International Journal of Fatigue, 2007, 29(9-11): 1978-1984.
[5] STATNIKOV E S, MUKTEPAVEL V O, BLOMQ-VIST A. Comparison of ultrasonic impact treatment (UIT) and other fatigue life improvement methods[J]. Welding in the World, 2002, 46(3): 20-32.
[6] 王东坡, 周达. 超声冲击法提高焊接接头疲劳强度的机理分析[J]. 天津大学学报, 2007, 40(5): 623-628. [7] 白易立, 王东坡, 邓彩艳, 等. 超声冲击强度对焊接接头疲劳寿命的影响[J]. 焊接学报, 2019, 40(12): 149-153. [8] TEHRANI YEKTA R, GHAHREMANI K, WALB-RIDGE S. Effect of quality control parameter variations on the fatigue performance of ultrasonic impact treated welds[J]. International Journal of Fatigue, 2013, 55: 245-256.
[9] 何柏林, 江民华. 焊趾熔修改善焊接接头疲劳性能的研究现状[J]. 热加工工艺, 2014, 43(1): 5-8. [10] 薛钢. 表面压应力对10Ni5CrMoV钢疲劳性能的影响[J]. 材料开发与应用, 2009, 24(2): 1-3. [11] 钱才富, 姜忠军, 陈平, 等. 裂纹尖端塑性区和无位错区的微观模拟[J]. 金属学报, 2004, 40(2): 159-162. [12] 付浩. 基于位错理论的疲劳裂纹扩展特性研究[D]. 长沙: 长沙理工大学: 1-47. [13] 揭志羽, 李亚东, 卫星. 初始损伤对焊接节点疲劳性能的影响[J]. 西南交通大学学报, 2015, 50(3): 423-427. [14] 薛钢, 王任甫. 焊趾TIG熔修对10Ni5CrMoV钢焊接节点疲劳性能的影响[J]. 焊接学报, 2008, 29(6): 77-80. [15] 薛钢, 邓晚平, 王任甫. 焊趾处理工艺对10Ni-5CrMoV钢低周疲劳性能的影响[J]. 焊接学报, 2010, 31(3): 105-108.
计量
- 文章访问数: 99
- HTML全文浏览量: 11
- PDF下载量: 20
下载:
