目的 解决传统硬质泡沫塑料易碎盖存在的承压能力不足、冲破性能不稳定、不能有效防潮控湿、电磁兼容性差等缺陷。方法 以某型导弹武器系统发射筒密封盖为主要应用对象开展薄膜盖设计，主要包括总体结构设计、零部件设计、功能设计及仿真验证。结果 薄膜盖经密封、承压、冲破、电磁兼容等性能考核，均满足装备贮存使用要求，冲破盖体所受的最大峰值冲击力可稳定保持在1 200~1 600 N。结论 建立了薄膜盖结构与功能一体化设计方法，可满足在研型号对新型密封盖的设计需求，并为新型号弹箭发射筒大尺寸密封盖的顺利研制提供技术储备。

The work aims to solve the shortcomings of traditional rigid foam plastic fragile cover, such as insufficient pressure bearing capacity, unstable bursting performance, ineffective moisture and humidity control, and poor electromagnetic compatibility. The design of film cover was carried out with the sealing cover of the launch cylinder in a missile weapon system as the main application object, including overall structural design, component design, functional design, and simulation verification. After performance evaluation, the sealing, pressure-bearing, bursting and electromagnetic compatibility of the film cover could meet the requirements of equipment storage and use. The maximum peak impact force breaking through the cover could be kept between 1 200 and 1 600 N. An integrated design method of the structure and function of the film cover is established, which can meet the design requirements of the new type of sealing cover for the model under study and provide technical reserves for the smooth development of the large-size sealing cover for the new type of missile launcher.