根据等强度原则推导了内压弯管的理论壁厚分布,并根据热推制弯管的加工特点,提出一种假定的壁厚分布。对假定壁厚分布的内压弯管进行有限元分析,发现与等厚度弯管相比,其应力分布更均匀,最大应力明显减小,可有效改善弯管承压能力。 According to the principle of equal strength, the theoretical wall thickness distribution of internal pressure elbow is deduced, and a hypothetical wall thickness distribution is proposed according to the processing characteristics of hot elbow pipe. Finite element analysis of internal pressure elbows with assumed wall thickness distribution shows that the stress distribution is more uniform and the maximum stress is obviously lower than that of elbows with equal thickness, which can effectively improve the pressure-bearing capacity of elbows.