液氢卧式贮罐内支承设计及热结构特性  

The internal support design and thermal structure characteristics of a liquid hydrogen horizontal storage tank

作　　者：王波 陈叔平[1] 马梓阳 代紫璇 吴宗礼 赵国锋 马晓勇 Wang Bo;Chen Shuping;Ma Ziyang;Dai Zixuan;Wu Zongli;Zhao Guofeng;Ma Xiaoyong(School of Petrochemical Engineering,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]兰州理工大学石油化工学院,兰州730050

出　　处：《低温与超导》2024年第12期89-97,共9页Cryogenics and Superconductivity

基　　金：甘肃省科技重大专项(22ZD6GA026)资助。

摘　　要：为满足液氢贮罐强度和低蒸发率要求,设计了一种应用于液氢贮罐的吊杆、拉杆、玻璃钢组合式内支承结构。采用有限元方法,对贮罐正常工作工况下的热结构耦合特性及空罐运输过程中的强度进行分析。结果表明,该内支承结构漏热量占比为14.18%,与同类型贮罐内支承漏热量占比(20%~50%)相比显著降低,贮罐日蒸发率为0.365%/d,小于标准指标(0.465%/d)。热应力载荷对吊杆支承影响显著,在热应力载荷作用下,吊杆主要承受附加弯矩,应力极值为833.93 MPa。在此基础上施加压力载荷后,吊杆承受附加弯矩明显减小,应力极值减少50.5%。在正常工作工况下吊杆杆端与杆身连接处为该内支承应力集中部位,在空罐运输过程中耳板与垫板焊缝处为该内支承应力集中部位。To meet the strength and low boil-off rate requirements of the liquid hydrogen storage tank,a composite internal support structure with a suspension rod,tension rod and fiberglass was specifically designed for application in such tank.Finite element methods were employed to analyze the thermo-structural coupling characteristics of the storage tank under normal oper⁃ating conditions and evaluate its structural strength during empty transportation.The results indicate that the heat leakage contri⁃bution of the internal support structure is 14.18%,significantly lower than that of similar storage tanks(20%to 50%).The daily boil-off rate of the tank is 0.365%/d,which is below the standard threshold of 0.465%/d.Thermal stress loading sig⁃nificantly impacts the performance of the suspension rod support,primarily introducing additional bending moments under thermal stress.The maximum stress reaches 833.93 MPa.When pressure loading is subsequently applied,the additional bending mo⁃ments on the suspension rod are markedly reduced,resulting in a 50.5%decrease in the maximum stress.Under normal operat⁃ing conditions,the connection between the rod end and the rod body serves as the stress concentration area of the internal sup⁃port.During empty tank transportation,stress concentration is observed at the welds between the lug plate and the pad plate.Therefore,structural dimensions at these locations can be further optimized to reduce stress levels.

关 键 词：内支承结构 热结构耦合 漏热量 应力强度 

分 类 号：TB658[一般工业技术—制冷工程]