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中文摘要：
设计了正交试验并在高压舱内进行了0.2-60m的水下湿法药芯焊丝焊接,利用多元曲线回归方法从试验数据中建立了焊接工艺参数和焊缝成形尺寸之间的数学模型。然后,进行敏感度分析来预测焊缝几何尺寸,并量化评估工艺参数如焊接电流、电压、焊接速度、导电嘴至工件距离（CTWD）和水深对焊缝几何尺寸的影响。结果表明,当焊接水深较浅（小于10m）时,水深对焊缝几何尺寸的影响比其他参数的大。在较大的水深下（大于10m）,焊接速度的变化对焊缝尺寸的影响最大。
英文摘要：
To investigate influence of welding parameters on weld bead geometry in underwater wet flux cored arc welding （FCAW）, orthogonal experiments of underwater wet FCAW were conducted in the hyperbaric chamber at water depth from 0.2 m to 60 m and mathematical models were developed by multiple curvilinear regression method from the experimental data. Sensitivity analysis was then performed to predict the bead geometry and evaluate the influence of welding parameters. The results reveal that water depth has a greater influence on bead geometry than other welding parameters when welding at a water depth less than 10 m. At a water depth deeper than 10 m, a change in travel speed affects the bead geometry more strongly than other welding parameters.
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