摘要
焊接的非平衡加热、冷却过程导致产生焊接应力与变形,而焊接残余变形是影响结构设计完整性、制造工艺合理性和结构使用可靠性的关键因素。本文基于"局部-整体"映射法,模拟了局部模型为T形接头角焊缝的局部塑性应变,并把结果用于薄壁箱形梁的焊接装配变形数值仿真,同时对不同焊接顺序产生的残余变形情况进行了分析和探讨,并将预测结果与焊接工艺试验结果进行了对比验证,二者吻合很好,从而为研究焊接顺序对大型焊接结构变形的影响提供了一种方法。
The unbalanced heating/cooling of welding leads to welding residual stress and distortion.The welding residual deformation is the crucial influential factor in the design integrality,the rational manufacturing techniques and the service durability of welding structures.In the paper,T-joint weld plastic strain of the local model was simulated and its results were applied into whole welding assembly deformation simulation of thin-shell box beam based on'local-global'method.The influence of different welding sequences on residual deformation was also studied and prediction value is very close to experimental results.So an economical numerical method is provided for studying the influence of welding sequences on large-scale welding structure deformation.
出处
《焊接技术》
北大核心
2008年第1期43-46,共4页
Welding Technology
基金
复杂产品协同设计
仿真
优化一体化平台研究开发及其应用
国家863项目(2006AA04Z160)
