【摘要】 采用与带压开孔中相同的焊接工艺(间断焊)制造2台带压开孔试验模型,分别用于横向和纵向的弯矩试验,研究带压开孔管道的强度性能。结果表明,在弯矩作用下,带压开孔结构的支管和主管两侧的弹性应力分布呈现反对称性,在支管和主管的相贯区附近有明显的应力集中,支管和主管相贯区受拉侧关键点的极限弯矩值最小,应力值最大,此处为结构的危险区域;在结构尺寸和材料相同的情况下,承受纵向弯矩模型的极限弯矩大于承受横向弯矩模型的极限弯矩,二者的比值为1.68。更多还原

【Abstract】 Using the discontinuous welding technology,2 hot tapping structures with the same material and size were fabricated.The models used to study the strength property of those structures under longitude moment and transverse moment.The results indicate that the stress distribution of pipe and nozzle shows the bilateral symmetry in the plane of branch moment,the distribution of stress concentration close to pipe-nozzle intersection area,the minimum limit moment and the maximal stress of the critical points are in the extend side of the pipe-nozzle intersection area,the area close to these points is dangerous;with the same material and size,the limit moment of the model subjecting to moment is higher than the limit moment of the model subjecting transverse moment, the ratio of limit moment between the two models is 1.68.更多还原