海洋平台筒式桩腿结构的焊接变形预测和消除
|
摘要
针对海洋生活平台桩腿的齿条与筒体焊接变形问题,基于迭代子结构法(ISM)和多核并行计算技术的高效热-弹-塑性有限元计算代码,依据结构对称性的特点,建立实际齿条与筒体焊接结构的1/4有限元模型,预测的焊接变形和测量结果趋势一致,数值基本吻合。为了提高建造精度,采用在筒体内表面进行堆焊的工艺措施,产生反变形,抵消齿条与筒体焊接产生的变形,焊接变形量可减70%。
Focusing on the welding deformation between rack and cylinder welding in leg structure of living offshore, high effective thermal-elastic-plastic FE analysis with the iterative substructure method(ISM) and parallel computation was proposed for welding deformation prediction. The quarter FE model of rack and cylinder welded structure was established due to its symmetrical feature. The numerical result has a good agreement with those of measurement. In order to improve the fabrication accuracy, the bead-on-plate welding on inner surface of cylindrical leg structure was applied to generate inverse deformation for previous welding deformation mitigation; the welding deformation can be reduced by 70%.
Focusing on the welding deformation between rack and cylinder welding in leg structure of living offshore, high effective thermal-elastic-plastic FE analysis with the iterative substructure method(ISM) and parallel computation was proposed for welding deformation prediction. The quarter FE model of rack and cylinder welded structure was established due to its symmetrical feature. The numerical result has a good agreement with those of measurement. In order to improve the fabrication accuracy, the bead-on-plate welding on inner surface of cylindrical leg structure was applied to generate inverse deformation for previous welding deformation mitigation; the welding deformation can be reduced by 70%.
引文
[1] ZHOU H, LUO P, JIANG Z, et al. Research on the cutting thermodynamic behavior of high-strength large-thickness offshore jack-up platform leg rack[J]. 中国焊接(英文版),2015,24(4):56-63.
[2] 沈楠楠,靳伟亮,程显平,等.自升式钻井船齿条接长焊接变形控制措施[J].焊接技术,2017(11):79-81.
[3] 吴宇新.自升式平台桩腿焊接变形和应力控制技术研究[J].船舶工程,2016(10):26-31.
[4] 郇学东,孙桂芳,卢轶,等.风电安装船圆柱形桩腿打底焊接过程的数值模拟[J].中国海洋平台,2017(5):89-93.
[5] 梁宏宝,李博,马百涛.CP-300自升式钻井平台桩腿齿条板焊接工艺的研究[J].重型机械,2016(1):43-47.
[6] 王江超,周宏.基于弹性有限元分析的船体结构焊接变形研究[J].中国造船,2016,57(3):109-115.
[7] MA N, WANG J, OKUMOTO Y. Out-of-plane welding distortion prediction and mitigation in stiffened welded structures[J]. International journal of advanced manufacturing technology, 2016,84(5/6/7/8):1371-1389.
[8] WANG J, RASHED S, MURAKAWA H. FE Analysis of buckling behavior caused by welding in thin plates of high tensile strength steel[J]. Journal of materials engineering & performance, 2014,23(12):4358-4365.
[9] MURAKAWA H, MA N, HUANG H. Iterative substructure method employing concept of inherent strain for large-scale welding problems[J]. Welding in the world, 2015,59(1):53-63.
[10] MA N. An accelerated explicit method with GPU parallel computing for thermal stress and welding deformation of large structure models[J]. International journal of advanced manufacturing technology, 2016,87(5/6/7/8):1-17.
[2] 沈楠楠,靳伟亮,程显平,等.自升式钻井船齿条接长焊接变形控制措施[J].焊接技术,2017(11):79-81.
[3] 吴宇新.自升式平台桩腿焊接变形和应力控制技术研究[J].船舶工程,2016(10):26-31.
[4] 郇学东,孙桂芳,卢轶,等.风电安装船圆柱形桩腿打底焊接过程的数值模拟[J].中国海洋平台,2017(5):89-93.
[5] 梁宏宝,李博,马百涛.CP-300自升式钻井平台桩腿齿条板焊接工艺的研究[J].重型机械,2016(1):43-47.
[6] 王江超,周宏.基于弹性有限元分析的船体结构焊接变形研究[J].中国造船,2016,57(3):109-115.
[7] MA N, WANG J, OKUMOTO Y. Out-of-plane welding distortion prediction and mitigation in stiffened welded structures[J]. International journal of advanced manufacturing technology, 2016,84(5/6/7/8):1371-1389.
[8] WANG J, RASHED S, MURAKAWA H. FE Analysis of buckling behavior caused by welding in thin plates of high tensile strength steel[J]. Journal of materials engineering & performance, 2014,23(12):4358-4365.
[9] MURAKAWA H, MA N, HUANG H. Iterative substructure method employing concept of inherent strain for large-scale welding problems[J]. Welding in the world, 2015,59(1):53-63.
[10] MA N. An accelerated explicit method with GPU parallel computing for thermal stress and welding deformation of large structure models[J]. International journal of advanced manufacturing technology, 2016,87(5/6/7/8):1-17.