大型圆柱形壳体上圆形焊缝的焊接变形

应用模型试验和数值分析研究了大型圆形壳体上圆形焊缝对法兰平面度的影响。研究表明：圆柱形壳体与法兰对接的圆形弧缝引起法兰平面的外侧倾斜，小圆柱壳体与大容器相贯的圆形焊缝对法兰平面的倾斜没有显著影响，在圆周方向上法兰局部下凹；并用有限元分析实际圆形壳体与法兰对接时，由于纵向引起法兰外侧的斜率，其结果与模型试验分析的相吻全。

Welding Deformations due to Circular Welds in Large Cylindrical Shells

Welding deformations due to circular welds in the large cylindrical shell is studied by the model test and numerical analysis. The result shows that the inclination of the flange's plane is induced by the circular weld at the joint between the cylindrical shell and the flange. The effect of the circular welds between the small cylindrical shells and the large cylindrical shell on the flange's plane is not obvious, but it induces the partial concave of the flange's plane in the circumference. The inclination slop of the flange's plane, which is induced by the circumferential weld at the joint between the actual vacuum vessel and the flange, is analysed by FEM. FEM result coincides well with the value which is analyzed by the model test.