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针对薄板加强筋结构焊接残余应力和焊接变形复杂的问题,先对单一T型接头进行数值模拟以验证焊接模拟的合理性,最后对薄板加强筋结构焊接温度场和应力场进行数值模拟。结果表明,T型接头在焊后发生了角变形,最大的变形量位于底板的角点处,大小为5.0 mm,数值模拟与残余应力测试结果表现出很好的一致性;薄板加强筋结构焊后残余应力主要沿着焊缝分布,在远离焊缝处残余应力迅速减小,最大残余应力位于横向筋板与底板焊缝处,大小为329 MPa;薄板加强筋结构焊后最大变形处位于底板的角点处,数值模拟得到的最大变形量为107 mm,实际测量的最大焊接变形量为105mm,数值模拟与实际焊接变形结果较好的吻合。
In order to solve the problem of the welding residual stress and the welding deformation of the plate stiffener structure, a single T-joint is simulated to verify the rationality of the welding simulation. Finally, the numerical simulation of the welding temperature field and the stress field of the plate stiffener structure is carried out. The results show that the T-shaped joint has the angle deformation after welding, the maximum deformation is located at the corner of the bottom plate, the size is 5.0 mm, and the numerical simulation and residual stress test results show good consistency. The thin plate stiffener structure welding The residual stress mainly distributes along the weld seam, and the residual stress decreases rapidly away from the weld seam. The maximum residual stress is located at the welding seam of the transverse rib plate and the bottom plate with a size of 329 MPa. The maximum deformation of the plate stiffener structure after welding is located on the bottom plate The maximum deformation value obtained by numerical simulation is 107 mm, the actual measured maximum welding deformation amount is 105 mm, and the numerical simulation is in good agreement with the actual welding deformation result.