Abstract: Common bulkhead tank is an ideal propellant tank structure, which can reduce the mass of the launch vehicle and improve the structural efficiency of the rocket. In this work, a stainless steel/rigid polyurethane foam sandwich common bulkhead structure was designed for the liquid oxygen/liquid methane cryogenic propellant combination. The thermal insulation performance, strength, stiffness, and stability of the designed structure were analyzed and verified by finite element simulation. The results show that the designed structure can meet the thermal insulation requirements of low-temperature propellants, ensure the use of materials without failure under the combined action of low-temperature load and internal pressure, and the structure will not fail when the internal pressure difference between the two tank segments is less than 0.260 MPa. Through the design and analysis of the common bulkhead structure, it can provide the corresponding reference for the common bottom design of similar low-temperature storage tanks.
巩瑞琦, 崔哲, 董小雷, 刘芃山, 孙伟. 不锈钢-硬质聚氨酯复合材料超低温共底结构设计与分析[J]. 材料导报, 2025, 39(17): 24060106-7.
GONG Ruiqi, CUI Zhe, DONG Xiaolei, LIU Pengshan, SUN Wei. Design and Analysis of Ultra-low Temperature Common Base Structure of Stainless Steel and Rigid Polyurethane Composite. Materials Reports, 2025, 39(17): 24060106-7.
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2025, Vol. 39 
