面外弯矩下输油管道三通极限承载能力研究  

Research on tee joint limit of oil pipeline under out-plane bending moment

作　　者：贾慧灵[1] 杜鹏飞[2] 孙亮[3] 

机构地区：[1]内蒙古科技大学机械工程学院,内蒙古014032 [2]内蒙古包头市交通运输管理处,内蒙古014010 [3]国家质量监督检验检疫总局特种设备检测研究中心,北京100013

出　　处：《机械设计与制造》2011年第5期121-123,共3页Machinery Design & Manufacture

基　　金：内蒙古科技大学青年基金项目(KJ200647)

摘　　要：三通承受载荷较直管段复杂,其中较危险的载荷是作用于支管端部的面外弯矩,准确预测三通的塑性极限面外弯矩载荷,成为管道完整性评估的关键技术。使用ANSYS软件对三通进行了弹塑性有限元分析,得出了受面外弯矩时三通的三种失效模式,分析表明主管壁厚和支管外径是影响三通塑性极限面外弯矩的主要因素。针对常用几何尺寸三通建立了塑性极限面外弯矩有限元解数据库,并拟合得到三通的塑性极限面外弯矩工程估算公式,为三通的强度分析提供了基础数据及计算方法。The load borne on a Tee joint is more complicated than that on a straight pipe,in which more danger load is the out-of-plane moment applied on the end of branch pipe.To predetermine the elastic limit precisely of the out-of-plane moment of Tees shall be a key technology for assessing the intergrity of pipeline.A finite element analysis for elastic-plastic performance of the tee is conducted with ANSYS software.And three kinds of failure modes for the tee joint under out-plane moment is obtained.The analysis shows that wall-thickness of the main pipe and diameter of the branch pipe are the main factors that affects plastic limit out-of-plane moment of the tee joint.Therefore database on plastic limit out-of-plane moment for geometric dimension tee joints is built and engineering estimating formula for plastic limit of out-plane moment of the joint is obtained,which provides basic data and calculating methods for analyzing the strength analysis of the tee joints.

关 键 词：三通 极限载荷 失效模式 有限元分析 工程估算公式 

分 类 号：TH16[机械工程—机械制造及自动化] U173.91[交通运输工程]