货运飞船柔性货包装载及建模技术研究

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贾东永,雷剑宇,孙维,白明生,韩彬,于晓洲.货运飞船柔性货包装载及建模技术研究[J].,2022,62(4):411-418

货运飞船柔性货包装载及建模技术研究

Packaging and modeling technology research of flexibl epackages on cargo spacecraft

DOI：10.7511/dllgxb202204010

中文关键词:货运飞船缓冲包装动力学分析频率预示建模

英文关键词:cargo spacecraft cushioning package dynamic analysis frequency indication modeling

基金项目:国家重点研发计划资助项目(2021YFE0116000).

作者	单位
贾东永,雷剑宇,孙维,白明生,韩彬,于晓洲

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中文摘要:

针对中国货运飞船研制过程中柔性货包数量多、质量大、刚度非线性对整船基频产生影响的问题，提出了基于蜂窝夹层板结构的束缚带绑扎方案和基于BUSH元法的柔性货包性能仿真方法，开展了子结构局部试验，获取了货包与货架连接刚度关键参数，并使用该参数通过广义弹簧单元(BUSH)和质量点对货包进行精确模拟．通过货运飞船整船不同货物状态的振动试验对该方法计算得到的整船基频进行了试验验证，结果表明该方法将试验-仿真误差由原来的10%减小至1%，成功解决了货包柔性状态难以模拟的难题．该方法已应用于天舟货运飞船，后续还可应用于载人登月飞船等其他航天器研制．

英文摘要:

To address the problems of the large number and mass of flexible cargo packages and the influence of stiffness nonlinearity on the whole ship′s fundamental frequency during the development of Chinese cargo spacecraft, a binding strap tying scheme based on honeycomb sandwich panel structure and a flexible cargo package simulation method based on BUSH element method are proposed. Sub-structure local tests are carried out to obtain the key parameters of the cargo packages and shelf connection stiffness. And the above key parameters are used to simulate the cargo package accurately by means of generalized spring element (BUSH) and mass point. The vibration tests of the whole cargo ship in different cargo states are conducted to verify the whole ship fundamental frequency calculated by this method. The results show that the method reduces the test simulation deviation from the original 10% to 1%, and successfully solves the problem that the flexible state of the cargo package is difficult to simulate. The method has been applied to the Tianzhou cargo spacecraft, and can be applied to other spacecraft development such as manned lunar spacecraft.

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