目的 为抗事故包装箱密封结构设计提供依据。方法 介绍2种抗事故包装箱密封结构的设计，分析经历事故场景后2种密封结构的密封面变形和O形密封圈压缩率变化情况，开展密封性能试验。结果 端面密封结构经历事故场景后，O形密封圈压缩率不小于15%时，密封结构检测漏率为环境本底漏率，压缩率降至10%时，漏率明显增加，但仍能达到1 μPa•m3/s量级，压缩率降至5%时，密封结构彻底失效。柱面密封结构的联接螺栓即使经历事故场景后全部失效，密封结构的密封性能也基本保持不变，检测漏率为环境本底漏率。结论 柱面密封结构抵御事故风险的能力更强。

The work aims to provide a basis for the design of seal structure of accident-resistant packaging container. The design of two kinds of seal structures for accident-resistant packaging container was introduced. The deformation of sealing face and the change of compression rate of the O-ring after accident scenario were analyzed, and then the sealing performance tests were conducted. When end face seal structure was subject to accident scenario, if the compression rate of O-ring was no less than 15%, the leak rate of seal structure detected was the environment background leak rate. When the compression rate dropped to 10%, the leak rate increased considerably, but it could still reach an order of magnitude of 1 μPa•m3/s. When the compression rate dropped to 5%, the seal structure failed completely. For the cylindrical face seal structure, even though all its connecting bolts failed after the accident scenario, the sealing performance of seal structure basically remained unchanged, and the leak rate detected was the environment background leak rate. The ability of the cylindrical face seal structure to resist accident risk is stronger.