目的 设计易裂变二氧化铀粉末运输容器，证明容器在最危险姿态下，可以满足9 m跌落的核临界、屏蔽安全和放射性物质包容相关设计准则。方法 设计外柔内刚的三层密封容器，内外壳之间填充聚氨酯减振吸能材料，建模分析容器多种姿态下的结构与功能材料动态响应，确定最危险跌落姿态。针对最危险工况开展实际跌落测试试验，证明容器在假想事故下的安全性。结果 容器在最危险跌落工况下，聚氨酯材料减振吸能效果与设计计算相符，中子吸收板、中子慢化板等功能材料位置和缺损量符合要求。二氧化铀粉末的密封性得以保障。结论 以有限元分析为基础的容器仿真分析与样机试验结果匹配度较高，试验样机通过了相关跌落试验，证明了容器在危险姿态下的9 m跌落安全性能。

The work aims to design a transport container for fissionable uranium dioxide powder and prove that the container can meet the design criteria of nuclear criticality, shielding safety and radioactive material containment under a 9 m drop in the most dangerous posture. A three-layer sealed container that was flexible on the outside and rigid on the inside was designed, the vibration-reducing and energy-absorbing polyurethane materials were filled between the inner and outer shells, the dynamic response of the structure and functional materials of the container under various postures was established and analyzed, and the most dangerous dropping posture was determined. An actual drop test was carried out for the most dangerous working conditions to prove the safety of the container under imaginary accidents. Under the most dangerous dropping condition of the container, the vibration-reducing and energy-absorbing effect of polyurethane materials was consistent with the design calculation, and the position and defect amount of functional materials such as neutron absorption plate and neutron moderator plate met the requirements. The tightness of uranium dioxide powder was guaranteed. The container simulation analysis based on finite element analysis has a high matching degree with the prototype test results. The prototype has passed the relevant drop test, proving the safety performance of the container in a dangerous posture under a 9 meter drop.