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首页> 外文期刊>Journal of Materials Engineering and Performance >Efficient Simulation of Welding Distortion in Large Structures and Its Reduction by Jig Constraints
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Efficient Simulation of Welding Distortion in Large Structures and Its Reduction by Jig Constraints

机译：高结构焊接变形的高效模拟及其通过夹具约束减少

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摘要

Two large construction machinery structures were welded separately with and without jig constraints. The welding distortion of the entire structure was measured by a 3D coordinate measuring system and simulated by elastic FEM using the inherent deformation method. To obtain an accurate inherent deformation, a thermal elastoplastic FE analysis of simple one-side fillet joints with and without jig constraints was performed. Efficient simulation of welding distortion in large structures was accomplished by applying inherent deformation in a localized region, and the effect of jig constraint on the reduction of welding distortion was clarified. The computation of inherent deformation, the weld zone definition and the conversion of inherent deformation into inherent strain were automated. Measured and computed welding distortions in large structures had a good correspondence with respect to both tendency and magnitude. Further investigation of jig configuration was performed for enhanced reduction of welding distortion. Alternative controlling techniques for common welded structures were also addressed.
机译：两种大型建筑机械结构与夹具约束分开焊接。通过3D坐标测量系统测量整个结构的焊接变形，并通过使用固有的变形方法通过弹性有限元模拟。为了获得准确的固有变形，进行了简单的单侧圆角接头的热弹性Fe分析，具有和不具有夹具约束。通过在局部区域施加固有的变形来实现大结构中焊接变形的高效模拟，阐明了夹具限制对焊接变形的减少的影响。固有变形，焊接区定义和固有变形转化为固有变形的计算是自动化的。在大结构中测量和计算的焊接失真与趋势和幅度相比具有良好的对应关系。进行进一步研究夹具配置，以提高焊接变形的降低。还寻址了共同焊接结构的替代控制技术。

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