超大型油罐罐壁与底板应力有限元仿真分析  

Finite Element Simulation Analysis on Stress of Tank Wall and Bottom Plate of Ultra-large Type Oil Tank

作　　者：蒋鹏程[1,2] 王旭 张延杰[1] 蒋代军[1] JIANG Peng cheng;WANG Xu;ZHANG Yan jie;JIANG Dai jun(School of Civil Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;Guangzhou Railway Group Co.,LTD,Guangzhou 510088,China)

机构地区：[1]兰州交通大学土木工程学院,甘肃兰州730070 [2]广州铁路集团公司,广东广州510088

出　　处：《兰州交通大学学报》2018年第4期7-11,共5页Journal of Lanzhou Jiaotong University

基　　金：长江学者和创新团队发展计划资助(IRT1139)

摘　　要：兰州原油末站大型油罐群,是我国首次在饱和黄土地基修建的大型储油设施.针对15×104 m3超大型非锚固油罐,采用ANSYS有限元软件,对大型储油罐基于接触条件下的二维轴对称有限元模型进行数值模拟分析.计算结果表明:罐壁环向应力大于竖向轴力,在第二圈罐壁和第三圈罐壁相连接的位置,环向应力值最大;油罐底板径向弯曲应力和环向应力均发生在油罐底板与罐壁相连接的大角焊缝处,径向弯曲应力是环向应力的2.7倍;在整个回填砂范围内,罐底变形较为均匀,罐底板有反向"翘离"现象,最大翘离高度为4.8mm;对于大型和超大型储油罐,罐体的薄弱环节在罐壁与底板相连接的大角焊缝处,在施工工程中注意保证钢板的焊接质量.The large oil tank group at the crude oil terminal in Lanzhou is the first large oil storage facility built on saturated loess foundation in China.Aiming at 15×10^4 m^3 extra-large non-anchored oil tank,the two-dimensional axisymmetric finite element model of large oil tank based on contact condition was simulated and analyzed by ANSYS finite element software.The calculation results show that the circumferential stress of the tank wall was greater than the vertical axial stress;and the maximum circumferential stress occurred at the position where the second and third ring of the tank wall were connected.The tank bottom plate＇s radial stress and circumferential stress occurred at the shell-to-bottom fillet welds where the bottom plate and wall of the tank were connected,and the radial stress was 2.7 times of the circumferential stress.The tank bottom deformation was uniform in the whole range of backfill sand,and the uplift appeared at the tank bottom plate.The maximum uplift height was 4.8 mm.The shell-to-bottom fillet welds,which were located at the connection of the tank bottom plate and tank wall were the weak link for large oil tank,The welding quality of steel plate should be ensured in strict accordance with the design and construction in the construction project.

关 键 词：岩土工程 超大型油罐 罐壁应力 数值模拟 

分 类 号：TE972[石油与天然气工程—石油机械设备]