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High performance thermo-mechanical joint for space applications

机译：高性能热机械接头，适用于空间应用

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摘要

A combined, numerical and experimental, study of a thermo-mechanical joint for satellite applications is presented. The joint was designed to provide high thermal insulation (160 K/W) for large mass equipment (70 kg) and satisfy, at the same time, NASA standards and mission requirements of a scientific satellite launched on July 2011. In general, mechanical and thermal requirements demand opposite solutions and a trade off between them is needed. The goal of our design is to develop a robust joint capable to meet both: structural and thermal requirements, while maintaining simplicity in manufacturing and assembly. A brief review on classical thermo-mechanical joints is presented to address the challenges that are overcome by this design. Simplified analytical models, detailed finite element simulations and experimental tests are developed to analyze and characterize the response of the proposed joint for both: (ⅰ) required levels of mechanical load defined by mission requirements and (ⅱ) in-flight heat transfer requirements. The simulation results are validated by experiments and the joint qualified by a rigorous mechanical and thermal test campaign. The presented design was successfully used to link a Microwave Radiometer to the SAC-D/Aquarius Satellite.
机译：介绍了卫星应用热机械接头的组合，数值和实验。该接头旨在为大型质量装备（70公斤）提供高保温（160 k / w），同时满足于2011年7月推出的科学卫星的NASA标准和任务要求。一般，机械和热需求需求相反的解决方案和它们之间的折扣。我们设计的目标是开发一种强大的联合，能够满足：结构和热要求，同时保持制造和组装的简单性。提出了关于经典热机械接头的简要审查，以解决这种设计克服的挑战。简化的分析模型，开发了详细的有限元模拟和实验测试，分析和表征所提出的关节的响应：（Ⅰ）特派团要求所定义的机械负荷水平和（Ⅱ）飞行中的传热要求。模拟结果通过实验和由严格的机械和热敏测试活动所限定的联合验证。所提出的设计成功地将微波辐射计连接到SAC-D / Aquarius卫星。

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