化工设备与管道
化工設備與管道
화공설비여관도
PROCESS EQUIPMENT DESIGN
2015年
3期
20-23
,共4页
球形封头%接管%有限元分析%强度评定%优化
毬形封頭%接管%有限元分析%彊度評定%優化
구형봉두%접관%유한원분석%강도평정%우화
spherical closure%nozzle%finite element analysis%strength assessment%optimization
球形封头开孔接管结构是压力容器常用结构之一，由于在封头与接管连接区域会产生应力集中，是压力容器失效的源头。基于ANSYS软件中的APDL语言建立了球形封头与接管连接结构的有限元模型，对该结构在内压和管道外载荷作用下进行了强度分析，并基于JB 4732标准对其进行安全评定，结果发现接管N2与球形封头连接区域的应力不能满足强度要求。基于此，提出了满足强度要求的优化结构，为工程上此结构的设计提供了一定参考依据。
毬形封頭開孔接管結構是壓力容器常用結構之一，由于在封頭與接管連接區域會產生應力集中，是壓力容器失效的源頭。基于ANSYS軟件中的APDL語言建立瞭毬形封頭與接管連接結構的有限元模型，對該結構在內壓和管道外載荷作用下進行瞭彊度分析，併基于JB 4732標準對其進行安全評定，結果髮現接管N2與毬形封頭連接區域的應力不能滿足彊度要求。基于此，提齣瞭滿足彊度要求的優化結構，為工程上此結構的設計提供瞭一定參攷依據。
구형봉두개공접관결구시압력용기상용결구지일，유우재봉두여접관련접구역회산생응력집중，시압력용기실효적원두。기우ANSYS연건중적APDL어언건립료구형봉두여접관련접결구적유한원모형，대해결구재내압화관도외재하작용하진행료강도분석，병기우JB 4732표준대기진행안전평정，결과발현접관N2여구형봉두련접구역적응력불능만족강도요구。기우차，제출료만족강도요구적우화결구，위공정상차결구적설계제공료일정삼고의거。
Opening with nozzle in spherical closure is one of commonly used structures in pressure vessel. In view of the existence of stress concentration in the conjunction of nozzle and shell, it may become the source of the failure occurred in pressure vessel. In this paper, by using APDL tool in ANSYS, finite element models for some practical structures of nozzle connected with spherical closure were established, and the strength of these structures were analyzed under the actions of internal and external pressure based on the criteria specified in JB4732. It was found that the structure of nozzle N2 could not reach strength requirement. Based on this result, this structure was optimized so that strength criteria can be fulfilled, which can be used as the reference for such structure in later engineering design.
