3500m^3天然气球罐应力测试  

Measurement of Stress and Strain for 3500m^3 Natural Gas Spherical Tank

作　　者：杨铁成[1] 吴如元 徐佩珠[1] 

机构地区：[1]合肥通用机械研究所,安徽合肥230031

出　　处：《压力容器》2003年第10期43-48,共6页Pressure Vessel Technology

摘　　要：35 0 0m3天然气球罐是上海 1998年重点实事工程。球罐设计压力P =1 5 3MPa ,球壳板材料为WEL -TEN6 10CF ,板厚 38mm。由于焊后不进行消除应力热处理 ,因此在气压试验前后对球壳板Y形焊缝、T形焊缝等部位进行了焊缝残余应力测试 ,在气压试验过程中对球壳板Y形焊缝、T形焊缝、赤道板支柱部位进行了应力应变测试。测试结果表明 ,经气压试验后焊缝残余应力有一定下降 ,应力应变测试表明球罐焊缝及热影响区没有出现明显的应力集中现象。球罐壳体的工作应力叠加残余应力的总和仍小于材料的屈服限 。The 3500 m 3 natural gas spherical tanks are the important project of Shanghai city in 1998. The design pressure of the spherical tank P =1.53MPa, the material of spherical shell plate is WEL-TEN610CF and the plate thickness is 38mm. Because postweld SR treatment is not carried out for the spherical tank, the residual stresses of the welds at the position like Y weld, T weld, etc. of spherical shell plate are measured before and after pneumatic test. In pneumatic test process the stress-strain measurements are carried out at the positions of Y weld, T weld, location of columns of equatorial plate. The test results show that the residual stress of the welds after pneumatic test are reduced to a certain extent and stress-strain measurements indicate that the phenomenon of considerable stress concentration does not take place at the welds and HAZ of the spherical tank. The sum of working stress and residual stress of the spherical shell is still smaller than the yield limit of the material, therefore, it is safe for the spherical tanks to operate under normal condition.

关 键 词：天然气球罐 残余应力 应力应变 

分 类 号：TQ053.2[化学工程]