论文部分内容阅读
结合有限元方法,多相腐蚀区缺陷的失效分析已经按照管道真实尺寸进行了爆管试验。已腐蚀的输气管线采用含有多种类型的人为机械缺陷的X65钢,这种钢已经多次作为输气管线的爆管试验材料。通过爆管试验,依据设计缺陷的尺寸、长度、宽度、深度和缺陷之间距离的不同,对输气管线上复合腐蚀缺陷的失效压力进行了测量。此外,对试验结果进行了模拟,并且同有限元方法进行了比较。有限元方法(FEM)的模拟结果显示多相缺陷的失效压力低于单相缺陷的失效压力;将多相缺陷的总体长度看作单个缺陷长度时,如果其值接近缺陷间距时,其失效压力更接近于单相缺陷的失效压力。
Combined with the finite element method, failure analysis of multi-phase corrosion zone defects has been carried out according to the actual pipe size of the pipe burst test. Corroded gas pipelines use X65 steel, which contains many types of man-made mechanical defects, which have been used as pipe burst test materials on gas pipelines many times. Through the squib test, the failure pressure of composite corrosion defects on the gas pipeline was measured according to the size, length, width, depth and the distance between the defects. In addition, the experimental results were simulated and compared with the finite element method. Finite element method (FEM) simulation results show that the failure pressure of multiphase defects is lower than the failure pressure of single phase defects. When the total length of multiphase defects is considered as a single defect length, its failure pressure Closer to single-phase failure failure pressure.