Numerical prediction and mitigation of out-of-plane welding distortion in ship panel structure by elastic FE analysis
Numerical prediction and mitigation of out-of-plane welding distortion in ship panel structure by elastic FE analysis
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DOI：
10.1016/j.marstruc.2013.09.003
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发表时间：
2013-12-01
影响因子：
3.9
通讯作者：
Luo, Yu
中科院分区：
文献类型：
--
作者：
Wang, Jiangchao;Rashed, Sherif;Luo, Yu
将基于固有变形理论的弹性有限元分析应用于预测和减轻面外焊接变形，以某纯汽车运输船板结构为研究对象。采用热弹塑性有限元分析方法，对该船体板结构中不同类型焊接接头的固有变形进行了预估。采用理想化的边界条件对局部变形进行弹性有限元分析，结果表明所考虑的船体板结构在边缘附近会发生屈曲，内部区域仅以弯曲变形为主。为了减轻屈曲和弯曲等面外焊接变形，采用了线加热矫直。在内部区域，仅在焊接接头的另一侧（快速移动火炬）施加与焊接引起的固有弯曲相同大小的固有弯曲。另一方面，仅将线加热产生的面内固有应变引入边缘区域以纠正屈曲变形（慢动火炬）。该船板结构的面外焊接变形可以减小到可接受的水平。(C) 2013 Elsevier Ltd.版权所有。
As an application to predict and mitigate the out-of-plane welding distortion by elastic FE analysis based on the inherent deformation theory, a panel structure of a pure car carrier ship is considered. The inherent deformations of different types of welded joints included in this ship panel structure are evaluated beforehand using thermal elastic plastic FE analysis. Applying idealized boundary condition to focus on the local deformation, elastic FE analysis shows that the considered ship panel structure will buckle near the edge and only bending distortion is dominant in the internal region. In order to mitigate out-of-plane welding distortion such as buckling and bending, straightening using line heating is employed. In the internal region, only inherent bending with the same magnitude as welding induced inherent bending is applied on the opposite side of welded joints (fast moving torch). On the other hand, only in-plane inherent strain produced by line heating is introduced to the edge region to correct buckling distortion (slow moving torch). The magnitude of out-of-plane welding distortion in this ship panel structure can be minimized to an accepted level. (C) 2013 Elsevier Ltd. All rights reserved.