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在航天器部组件热真空试验中,当两个试件在同一个空间环境模拟器内试验时,应防止两者之间的热影响。由于试件本身的热性能参数和试验可能要求不同,减少这种影响的有效措施就是将两个试件用液氮冷板隔开,这就要求在试验中冷板的温度必须与热沉基本一致。文章通过对适合做冷板的结构进行有限元分析,设计了一种新型的液氮冷板,能够将两个试件之间的热影响降低到很小。试验结果表明,这种结构的冷板能适应热真空试验的各种工况。
In the thermal vacuum test of the spacecraft component, the thermal effects between the two should be prevented when two specimens are tested in the same space environment simulator. As the thermal properties of the specimen itself may require different parameters and tests, an effective measure to reduce this effect is to separate the two specimens with a liquid nitrogen cold plate, which requires that the temperature of the cold plate in the test must be equal to the basic heat sink Consistent. Through the finite element analysis of the structure suitable for cold plate, a new type of liquid nitrogen cold plate is designed to reduce the thermal influence between the two specimens to a very small extent. The test results show that this structure of the cold plate can adapt to a variety of thermal vacuum test conditions.