为研究高强钢厚板的焊接残余应力，针对自升式平台桩腿主弦管-齿条焊接残余应力开展数值研究，采用二维热弹塑性有限元法预测了焊缝附近残余应力分布。通过与盲孔法测量值进行对比，验证了数值方法的可靠性。由于大型复杂构件焊接涉及多层多道焊，为了提高计算效率，在数值模拟中通常采用合并焊道的方法。本文讨论了焊道合并方式对残余应力分布的影响，提出了合理的焊道合并策略，在保证精度的同时显著提高了计算效率，具有一定的工程应用价值。
In order to study the welding residual stresses of high-strength steel thick plates, a numerical investigation on the welding residual stresses of the chord-rack weld in the jack-up platform leg was carried out. The two-dimensional thermal elastic-plastic finite element method was used to predict the distribution of welding residual stresses near the weld. By comparing the measured results with the hole-drilling method, the numerical method was verified. Since welding of large and complex components involves multi-pass welding, the lumped-pass method was generally used in numerical simulation to improve the calculation efficiency. The influence of lumped-pass patterns on residual stresses distribution was discussed, and a reasonable lumped-pass strategy was proposed, which can significantly improve the calculation efficiency while ensuring the accuracy, and have certain engineering application value.
2025,47(13): 78-84 收稿日期：2024-9-20
DOI：10.3404/j.issn.1672-7649.2025.13.014
分类号：U671
基金项目：国家自然科学基金资助项目（52101350）
作者简介：常岩松(1968-),男,高级工程师,研究方向为海上自升平台主弦管桩腿材料研发
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