X80钢级大口径热压三通力学分析.pdfVIP

2015年 2015 第6期 Pipeline Technique and Equipment No．6 X80钢级大口径热压三通力学分析 陈星明 (重庆燃气集团股份有限公司,重庆 400020) 摘要:热压三通的理论设计需要了解三通在其工作压力下的应力分布状态,因此,有必要确定热压 三通在其工作压力下的应力分布与三通内、外圆弧半径大小之间的关系。 采用弹塑性有限元方法和双 线性等向强化材料模型,采用有限元分析软件ANSYS对X80钢级大口径等径热压三通内、外圆弧半径 与三通受力关系进行了研究。 分析结果表明:最大应力出现在热压三通肩部的内侧,该处最薄弱;增大 壁厚能有效降低热压三通相贯区和腹部的应力水平;增大肩部过渡圆弧可以降低主、支管过渡区的最 大应力;增大壁厚对三通内壁上的应力集中指数影响不大。 关键词:X80级管道;热压三通;有限元;力学分析 - - - 中图分类号:TE8 文献标识码:A 文章编号:1004 9614(2015)06 0004 03 Stress Analysis on Large Diameter X80 Hot-embossing T-pipe CHEN Xing-ming (Chongqing Gas Group Co.,Ltd.,Chongqing400020,China) Abstract:T-pipe in itsworking pressure of the stress distribution statewas needed to be ensured by hot-embossing T-pipe theory design. So it is necessary to determine relationship between the stress of the hot-embossingT-pipe in itsworking pressure of the stress distribution andtheinner andouterradiusof theT-pipe.Basedonelastic-plasticfiniteelementtheory andBISOma- terial model,FEMnumerical simulationwasappliedtotheinner andouterradiusof theT-piperelationshipbetweenthe stressof the X80 pipe steelhot-embossingequaldiameterT-pipeusingFEAsoftwareANSYS.Theanalysisresultsshowthatthemaximum stress appears inthehot-embossingT-pipeinsideoftheshoulders,whichistheweakest;Increasingthewallthicknesscaneffec- tively reduce the hot-embossing T-pipejunction area and abdominal stress level;To increase the shoulder transition arc can re- duce the stress of thejunction area;Increasing the thickness of wall tee has little influence on st