Abstract To ensure the dimensional accuracy of fillet welded structures of a cantilever beam, triangle reinforcement plate stiffeners (TRPs) are employed to prevent welding distortion. However, this increases the weight of a structure. In this study, an efficient finite element (FE) computation was used to solve the afore mentioned engineering problem. The inherent deformations of typical welded joints in a mock-up welded structure were estimated through thermal elastic plastic FE (TEP FE) analysis. Subsequently, welding distortion of the mock-up welded structure was computed via elastic FE analysis wherein the inherent deformation was applied as a mechanical load. Specifically, the inherent deformation of a bevel fillet welded joint was initially estimated, and its precision was verified. The computed Z-direction welding displacement of a flange plate in the mock-up welded structure was in good agreement with the measured values. Hence, it was evident that TRPs mitigated the welding deflection of the flange plate. A series of elastic FE computations showed that the Z-direction welding displacement of the flange plate in an actual welded structure does not increase. However, the total weight of the actual welded structure apparently decreases when the position and number of TRPs are optimized.

中文翻译：

---

三角加强板加劲肋对减轻轻量化角焊结构焊接变形的影响

摘要 为保证悬臂梁角焊缝结构的尺寸精度，采用三角形加强板加强筋（TRPs）防止焊接变形。然而，这增加了结构的重量。在这项研究中，有效的有限元 (FE) 计算用于解决上述工程问题。模型焊接结构中典型焊接接头的固有变形通过热弹塑性有限元 (TEP FE) 分析进行估计。随后，通过弹性有限元分析计算模拟焊接结构的焊接变形，其中将固有变形作为机械载荷施加。具体而言，初步估计了斜角焊缝的固有变形，并验证了其精度。模拟焊接结构中法兰板的 Z 向焊接位移计算值与测量值非常吻合。因此，很明显 TRP 减轻了法兰板的焊接挠度。一系列弹性有限元计算表明，实际焊接结构中法兰板的 Z 向焊接位移并没有增加。然而，当优化 TRP 的位置和数量时，实际焊接结构的总重量明显减少。