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文章以航天器机械臂为研究对象,采用流-热-固耦合方法仿真分析了单一送风形式下,试验箱不同送风速度对机械臂常压低温热变形的影响,并进行了试验验证。分析发现:随着送风速度的增大,机械臂表面的温度场分布更均匀且温度值更接近于设定值,从而更有利于低温热变形试验的实施;但由于存在环境噪声,必须经过静置稳定后才可以进行变形测量。此分析结果可以用于指导航天器部件常压低温热变形试验更加精确、高效地实施。
In this paper, the spacecraft manipulator is taken as the research object. The effects of different blast velocities of the test chamber on the low temperature thermal deformation of the manipulator are simulated and simulated by the method of flow-heat-solid coupling. The analysis shows that with the increase of blowing velocity, the distribution of the temperature field on the arm surface is more uniform and the temperature value is closer to the set value, which is more conducive to the implementation of the low temperature thermal deformation test. However, due to the environmental noise, Stand still after deformation measurements can be carried out. The results of this analysis can be used to guide the spacecraft components atmospheric pressure low temperature thermal deformation test more accurately and efficiently.