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首页> 外文期刊>Ocean Engineering >Numerical and experimental investigations of outside corner joints welding deformation of an aluminum autonomous catamaran vehicle by inherent strain/deformation FE analysis
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Numerical and experimental investigations of outside corner joints welding deformation of an aluminum autonomous catamaran vehicle by inherent strain/deformation FE analysis

机译：固有菌株/变形Fe分析铝自动双体载铝焊接变形的数值和实验研究

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摘要

The welding deformation considerably plays a vital role in the production accuracy and efficiency of marine structures. In this study, welding deformation due to three outside corner joints (with angles of 60, 70 and 1401 used in an aluminum catamaran hull is evaluated by considering the length and welding speed parameters. The deformation is predicted via two numerical procedures based on finite element computations. Thermal-Elastic-Plastic (TEP) analysis is applied on local 3D solid models for each of the three outside corner joints to calculate inherent strain for global shell model of an aluminum catamaran to obtain deformation elastically based on inherent deformation theory. Validations of numerical results were performed by using metallographic observations and welding distortion. For more accuracy the softening effect was investigated by Vickers Microhardness test. The results from both TEP and FE elastic analyses indicate reasonably good agreement with experimental results. Besides, in the global shell model of the catamaran, out-of-plane welding deformation will occur significantly near the maximum angle of outside corner joint (140-degree) where the maximum welding distortion is obtained. Along with the welding speed parameter has considerable influence on decreasing distortion which results in reducing time-consuming and cost in the catamaran production stage.
机译：焊接变形在生产精度和船舶结构的效率方面显着起着至关重要的作用。在该研究中，通过考虑长度和焊接速度参数，通过三个外部角接头（具有60,70和1401的角度为60,70,70和1401的角度来评估。通过基于有限元的两个数值手术预测变形计算。热弹性塑料（TEP）分析用于三个外角接头中的每一个用于局部3D固体模型，以计算基于固有变形理论的铝制筏的全球壳模型的固有菌株。验证通过使用金相观测和焊接变形来进行数值结果。为了更准确，通过维克斯微硬度测试研究了软化效果。Tep和Fe Elastic分析的结果表明与实验结果相当好的协议。此外，在全球壳牌模型中双体船，外平面焊接变形将在MA附近显着发生获得最大焊接失真的外部角接头（140度）的Ximp角。随着焊接速度参数对降低变形具有相当大的影响，导致双体船生产阶段减少耗时和成本。

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