容器壳体大开孔补强方法的探讨

An Exploratory Study of the Reinforcement Method Used for Large-openings on a Vessel Shell

由于结构和工艺的要求,需要在容器壳体上设置大开孔结构。容器壳体大开孔的应力状况非常复杂,根据不同的强度失效准则,对壳体大开孔补强问题采用等面积法、压力面积法、极限载荷法、有限元法进行了分析和比较,探讨了几种补强方法的适用范围。针对现有补强方法的局限性,提出了采用三维有限元数值方法来分析大开孔接管补强问题是解决复杂壳体大开孔安全问题的最好方法。

Due to structural and technological requirements there arises the need to adopt a large-opening structure on a vessel shell.The stress state of such a large opening is very complicated.On the basis of different strength-failure criteria various methods for the reinforcement of shell large openings are analyzed and compared.Such methods include: equal area method,and also pressure area,extreme load,and finite element methods.The scope of applications of several reinforcement methods have been explored.With respect to the limitations of currently used reinforcement methods it is recommended that a three-dimensional finite element method-based numerical method for analyzing the reinforcement of nozzles of large openings may serve as the best method to solve the safety problem of complicated large openings of shells.