支架是航天器总装设计的重要组成部分，目前主要采用金属材质铸造成型，质量较大，成品率较低。复杂的太空环境要求支架具有非常高的尺寸稳定性。因此为提高结构刚度和减重，选取典型结构的支架进行轻量化研究。首先，根据碳纤维复合材料的性能参数和支架边界条件建立有限元模型并进行仿真分析；其次，在突破复合材料支架成型技术的基础上完成了复合材料支架的制备；最后，制定试验方案，通过评估金属与碳纤维复合材料支架在正弦与随机振动时的响应，对比了2种支架的力学性能。结果表明：碳纤维复合材料支架具有更优异的力学性能和更轻的质量。
Stent is a very important part of spacecraft final assembly,which is founded by metal with heavy mass and low success.High dimension stability of stent is required urgently within intricate space environment.In order to improve the structural stiffness and abate the mass,a representative stent was selected to perform lightweight re-search.Based on the performance parameters of carbon fiber composite and boundary conditions,the finite element model was established and simulation analysis was performed firstly.Then the manufacture technology of composite stent was created and a composite stent was achieved.Finally,the testing scheme was made.The mechanical prop-erty comparison with metal and carbon fiber composite stent was worked out by evaluating the response of sine and random vibration.The result indicates that carbon fiber composite stent behaves better mechanical performance with lighter mass.
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