【摘要】 液氢储罐是海上液氢储运装备的关键部分，其结构安全性尤为重要.目前海上液氢储罐强度研究的文献较少，只能参考船用液化天然气(liquefied natural gas, LNG)的相关研究.文中以某2 500 m~3海上液氢储罐为研究对象，采用热—力耦合的方法对其进行传热分析和整体结构强度研究，得到温度场和Von-Mises应力分布规律，分析发现罐体与支撑结构连接处部位最大Von-Mises应力超出了屈服强度，并针对该应力较大部位进行局部结构加强研究，研究结果表明：采用在筒体中心线布置支撑结构的改进方案，最大Von-Mises应力约为192.4 MPa,降低了33%,低于屈服强度，满足储罐强度要求.研究成果可为海上液氢储罐的结构安全和可靠性分析提供相关理论依据.更多还原

【Abstract】 The liquid hydrogen storage tank is a key part of offshore liquid hydrogen storage and transportation equipment, whose structural safety is particularly important. At present, there are few literatures on the strength of offshore liquid hydrogen storage tanks, which can only be referred to the related research of marine LNG. In this paper, a 2 500 m~3 offshore liquid hydrogen storage tank is taken as the research object, and the heat transfer analysis and overall structural strength research are carried out by using the thermal-mechanical coupling method. The temperature field and Von-Mises stress distribution law are obtained. It is found that the maximum Von-Mises stress at the connection between the tank and the support structure exceeds the yield strength. Then, the local structural strengthening research is carried out on the part with comparatively great stress. The calculation results show that the maximum Von-Mises stress is about 192.4 MPa and the stress is reduced by about 33% by using the improved scheme of arranging the support structure in the center line of the cylinder, which is lower than yield strength, meeting the strength requirements of the storage tank. The research results of this paper can provide relevant theoretical basis for the structural safety and reliability analysis of offshore liquid hydrogen storage tanks.更多还原