焊缝收缩法焊接变形技术研究

Research on the Calculation of Welding Distortion Based on Welding Shrinkage Method

以船体甲板结构为研究对象,采用热弹塑性法和局部整体法计算分析甲板分段典型焊接接头应变大小,并将该计算结果与实验测量结果相对比控制和验证有限元计算精准度。以典型焊接接头计算结果为基础,采用Weld-Planner焊缝收缩法预测甲板分段结构的焊接变形。采用焊缝收缩法计算工程结构的焊接变形时,计算过程易于收敛,计算效率显著提高,是预测大型复杂结构焊接变形一种方便有效的方法。

This article focuses on hull deck structure and applies the thermal-elastic-plas- tic method and the local-global method to calculate the strain of welding joint in deck block, then compares the calculation results with experimental results to verify the accuracy of finite element calculations. Based on the calculation results of typical welding joint, the Weld-Plan- ner shrinkage method is applied to predict the welding distortion of deck block structure. With this method, the calculation process of welding distortion in engineering structure is easy to converge and the calculation efficiency is significantly improved. It proves that this is a con- venient and effective way to predict the welding distortion in large complex structure.