压力容器开孔接管局部应力计算方法研究  

Research of Methods for Calculating Local Stress at Root of Nggle Connected to Pressure vessel

作　　者：林杨杰[1] 金玉龙[2] 苏文献[2] 

机构地区：[1]拜耳技术工程(上海)有限公司工艺设备部,上海201507 [2]上海理工大学化工过程机械研究所,上海200093

出　　处：《化工设备与管道》2011年第6期1-5,9,共6页Process Equipment & Piping

摘　　要：在压力容器设计中,由于开孔而使器壁被削弱并破坏了原有结构的连续性,因而在开孔-接管附近产生了明显的应力集中,加上管道通过接管而施加于设备上的力和力矩会在容器与接管连接的局部区域产生高应力,使之成为整台设备的薄弱环节。所以,设计时应采用可靠的计算方法,以确定局部应力的大小。通过对13组不同结构尺寸的带接管轴向力的开孔接管模型,应用WRC 107和WRC 297公报中提供的方法计算模型开孔接管处的局部应力,并与用有限元分析方法得到的结果做比较。通过分析比较,对给定的壳体与接管连接结构在轴向力工况下如何合理选择一种方法给出了一些推荐意见,从而使得在保证安全的前提下,可以降低综合设计成本。In design of pressure vessel,the opening will weaken the wall of vessel and destroy the continuity of the structure.The opening area will become a weak area due to the local stress concentration as well as the external nozzle load and moment caused high local stress at the conjunction of the shell and nozzle.Therefore,a proper calculation method is essential to find out the value of the local stress in pressure vessel design.In this article,13 different size of nozzle opening structures with axial nozzle load are taken as the calculation models.The calculation results by WRC107 and WRC297 are compared with that by FEM.By these comparisons,we made some recommendation for the local stress calculation method for nozzle opening structure with axial load which are demonstrated as safe method but can reduce the design cost.

关 键 词：局部应力 计算方法 WRC107 WRC297 有限元分析 

分 类 号：TQ050.2[化学工程] TH49[机械工程—机械制造及自动化]