量化设计方法在天然气特大储罐结构安全中的应用  

Application of quantitative design method in structural intrinsic safety of natural gas super large storage tank

作　　者：郭子锋 Guo Zifeng(CNOOC Jiangsu Natural Gas Co.,Ltd.,Yancheng Jiangsu 224500,China)

机构地区：[1]中海油江苏天然气有限公司,江苏盐城224500

出　　处：《煤化工》2023年第2期111-115,共5页Coal Chemical Industry

摘　　要：为提高特大储罐结构的本质安全性,以地震环境为例,研究了量化设计方法在特大储罐结构本质安全中的应用。从设置储罐尺寸、选择保冷材料并计算漏热量和计算外罐体临界失稳压力值三方面,进行了特大储罐结构本质安全的量化设计。以用钢量最少为实验指标,采用ansys软件建立了量化设计方法、API设计方法和GB设计方法的特大储罐有限元模型,比较了工作工况和试水工况下的应力强度。结果表明,采用量化设计方法,较其他两种方法节省钢材用量在50 t以上,得到的应力强度与设定值更接近,量化效果好;在地震载荷施加作用下,其结构的环向应变和径向位移均在安全范围内,危害程度低,满足本质安全性要求。In order to improve the intrinsic safety of the super large storage tank structure,taking the seismic environment as an example,the application of quantitative design method in such intrinsic safety was studied.From such aspects as setting the tank size,selecting the cold insulation material,and calculating the heat leakage and the critical instability pressure of the outer tank,a quantitative design was carried out for the intrinsic safety of super large storage tank structure.Taking the minimum amount of steel as the experimental indicator,a finite element model of a super large storage tank was established for the quantitative design method,API design method,and GB design method with Ansys software.The stress intensity under working and water testing conditions was compared.The results showed that,compared with the other two methods,the steel consumption saved by quantitative design method was more than 50 t,the stress intensity obtained was closer to the set value,and the quantitative effect was good.Under the action of seismic load,the circumferential strain and radial displacement of the structure were within the safe range,with low hazard,meeting the requirements of intrinsic safety.

关 键 词：量化设计方法 液化天然气特大储罐 本质安全 保冷材料 失稳压力值 漏热计算 

分 类 号：TE972[石油与天然气工程—石油机械设备]