论文部分内容阅读
大门法兰是某直径17m超大真空容器的关键部件,其刚度特性直接影响到真空容器的密封效果及稳定性。针对超大真空容器传统形式法兰加工制造困难、消耗材料较多、结构刚度较差等问题,提出了一种新型的法兰结构形式。而新型法兰的焊接工艺将对其结构强度有较大影响,通过有限元模拟了大门法兰的两种焊接方案,并对焊后的应力及变形进行了分析,从而优选出焊接方案Ⅱ。采用焊接方案Ⅱ,焊后的最大变形量为18.3mm,两条焊缝的最大残余应力分别为210和270MPa。
Gate flange is a key part of a 17m diameter large vacuum vessel, the stiffness characteristics of a vacuum vessel directly affects the sealing effect and stability. Aiming at the problems such as the difficulty of manufacturing and processing the traditional flange of large vacuum vessel, more consumables and poor structural rigidity, a new type of flange structure is proposed. The new type of flange welding process will have a greater impact on the structural strength, through the finite element simulation of the two door flange welding program, and after welding stress and deformation were analyzed, so as to optimize the welding program Ⅱ. Using welding program Ⅱ, the maximum deformation after welding is 18.3mm, the maximum residual stress of the two welds is 210 and 270MPa respectively.