基于双椭球形热源的油田用小型储罐人孔焊接热应力分析  

Welding Stress Analysis of Oilfield Used Small Storage Tank Manhole Based on Double Ellipsoid Heat Source

作　　者：张锦洲[1,2] 付海荣[3] 唐恩施[3] 陈恒祥[4] 

机构地区：[1]长江大学机械工程学院,湖北荆州434023 [2]武汉科技大学机械工程及自动化学院,湖北武汉430081 [3]河南油田分公司新疆勘探开发中心,新疆焉耆841000 [4]中原石油勘探局工程建设总公司,河南濮阳457001

出　　处：《石油天然气学报》2011年第4期155-158,120,共4页Journal of Oil and Gas Technology

基　　金：湖北省教育厅重点项目(D200612007)

摘　　要：油田用小型储罐的安全性和可靠性非常重要,而储罐人孔处的焊接应力是最大、最复杂的,分析人孔处的应力是非常必要的。通过对焊接熔池中复杂的热过程用导热连续体中的焊接热源加以近似,建立二氧化碳气体保护焊的双椭球形热源模型,推导出人孔焊接应力最大值的计算公式并求出其应力集中系数的参考值。这种新的分析焊接应力的方法,计算较准确,对油田用压力容器焊接应力的分析有着积极的意义。The safety and reliability of oilfield used small storage tank were very important.The stress on its manhole was high and complex,so it was necessary to analyze the welding stress of manhole of the storage tank.The complex process in the welding pool was ignored,its complex thermal process was simulated by continuous conductive welding heat source.A double ellipsoid heat source model is established for protected carbon dioxide welding,a calculating formula of the maximum welding stress of manhole and the reference value of stress concentration factor are derived.This new method of welding stress analysis can be used for more accurately calculating the welding stress,it has positive meaning for welding stress analysis of pressure vessel.

关 键 词：双椭球形热源 人孔 焊接应力 

分 类 号：TE972[石油与天然气工程—石油机械设备]