复合材料低温贮箱渗漏检测试验
Leakage Detection Experiment of Composite Low-Temperature Tank

为了提高运载火箭的运输效率以及降低火箭发射成本，采用复合材料贮箱代替金属贮箱是最直接、最有效的方式。低温复合材料贮箱呈现明显的渗漏失效先于结构承载失效的特点，必须采用先进的渗漏性检测方法对复合材料贮箱进行渗漏性检测及漏率判定。本论文开展了复合材料低温贮箱渗漏检测试验系统平台搭建工作并对复合材料缩比低温贮箱进行了渗漏检测试验，获取到复合材料缩比低温贮箱在重复打压、反复加泄低温介质和带低温介质振动、液氧浸泡情况下的渗漏变化规律，对影响复合材料缩比贮箱结构渗漏的主要因素进行了研究和分析，论文工作对复合材料低温贮箱的渗漏检测和结构设计具有十分重要的意义。
In order to improve the transportation efficiency of launch vehicles and reduce rocket launch costs, using composite tanks instead of metal storage tanks is the most direct and effective way. Low-temperature composite tanks exhibit obvious leakage failure before structural bearing failure, and advanced leakage detection methods must be used to detect leakage and determine leakage rate of composite tanks. In this paper the construction of a leakage detection system platform for composite low-temperature tanks is carried out and leakage detection tests on composite scaled low-temperature tanks is conducted. The leakage changes of composite scaled low- temperature tanks under repeated pressure, repeated refuel and drainage of low-temperature medium, vibration with low-temperature medium, and liquid oxygen immersion were obtained. The main factors affecting the leakage of composite scaled tank were studied and analyzed. The work is of great significance for the leakage detection and structural design of composite low-temperature tanks.