基于有限元的外载作用下弯头局部强度分析  

Analysis of Elbow Local Strength Under External Loads Based on Finite Element Method

作　　者：雷俊杰[1] 王瑞英[1] 王学翠[1] 贾津津[1] 初文山 张巍伟[1] 邵艳红[1] 李硕存 

机构地区：[1]海洋石油工程股份有限公司设计公司,天津300451

出　　处：《辽宁化工》2013年第5期506-509,共4页Liaoning Chemical Industry

摘　　要：弯头是海上平台管道系统的重要管件,它不仅能改变介质流向,而且可以吸收热位移并减小管道推力。当弯头受到内压、轴向力、弯矩、扭矩等载荷作用时,弯头内侧、局部减薄等区域容易出现应力集中。本文以公称直径DN100、壁厚SCH160的90度长半径弯头为研究对象,应用APDL语言编写了计算弯头局部强度的命令流,分析弯头及弯头支架在内压、轴向力、弯矩、扭矩联合载荷作用下的应力分布并校核其局部强度。The elbow is an important fitting in the piping system of offshore platforms;it not only can change the flow direction of medium,but also can absorb the thermal displacement and reduce piping thrust.The inside of elbow,local thin area is prone to stress concentration when elbow is under internal pressure,axial force,bending moment and torque moment loads.In this paper,using 90 degree long-radius elbow of nominal diameter DN100 and wall thickness SCH160 as the research object,the command flow to calculate the elbow local strength was written by APDL language.The stress distribution and the local strength of elbow and elbow support were checked under internal pressure,axial force,bending moment,torque moment and combined load.

关 键 词：外载 弯头 局部强度 有限元 

分 类 号：TQ015[化学工程]