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H-1是日本的一种未来运载火箭,能把重约550公斤的有效载荷送入同步轨道。宇宙开发事业团目前正在集中力量加紧H-1运载火箭的最后研究工作。H-1运载火箭具有高运载能力是由于采用了新近研制的第二级液氢/液氧推进系统。第二级推进系统由一个贮箱和一台发动机组成。贮箱直径2.5米,长5.7米,能贮存8.7吨推进剂。贮箱为整体结构,用共底把前部的液氢箱和后部的液氧箱隔开。外表面用2219铝合金制造,涂有聚胺脂泡沫绝热层。共底由玻璃纤维增强塑料蜂窝夹芯和铝合金板制成。贮箱研制中最关键的项目是共底,因此,采用低温结构试验来验证共底结构的完整性。整个贮箱的结构完整性是通过缩比贮箱的低温结构试验和原型箱的室温结构试验来验证的。
H-1 is Japan’s future launch vehicle that can send payloads weighing approximately 550 kg into geostationary orbit. The Space Development Agency is currently concentrating its efforts on finalizing the H-1 launch vehicle. The high carrying capacity of the H-1 launch vehicle is due to the newly developed liquid hydrogen / liquid oxygen propulsion system. The second stage propulsion system consists of a tank and an engine. Tank diameter of 2.5 meters, 5.7 meters long, can store 8.7 tons of propellant. The tank as a whole structure, with a total of the former liquid hydrogen tank and the back of the liquid oxygen box separated. The exterior is made of 2219 aluminum alloy, coated with polyurethane foam insulation. The base is made of fiberglass reinforced plastic honeycomb sandwich and aluminum alloy plate. The most critical project in tank development is total bottoms, so low temperature structural tests are used to verify the integrity of the co-substrate structure. The structural integrity of the entire tank is verified by contracting the cryogenic structural test of the tank and the ambient temperature structural test of the prototype tank.