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地面保压试验是综合评估囊体材料性能的重要手段,其设计指标将影响平流层浮空器总体驻空高度与时间的变化范围。以球形超压平流层浮空器为例,建立了驻空高度运动学模型、热力学模型及基于微孔损伤的氦气渗透模型,综合考虑驻空过程中力、热耦合引起的浮空器内部氦气压力、温度和质量等的实时变化,以囊体材料微孔当量直径为桥梁建立了平流层浮空器地面保压指标与驻空高度、驻空时间的耦合关系,通过定量分析不同保压指标下浮空器驻空性能的变化情况,提取影响规律,为保压指标的合理设计提供总体参考。
The ground pressure test is an important means to comprehensively evaluate the properties of the capsule material. The design index will influence the range of the total height and time of the stratospheric aerostat. Taking the spherical over-pressure stratospheric aerostat as an example, the kinematic model, the thermodynamic model and the helium infiltration model based on micropore damage were established. Considering the aerodynamic and thermal coupling in the aerostat, Helium pressure, temperature and mass in real time, the coupling relationship between the stratospheric aerostat index and the height of stowage and the time in the stratosphere was established by taking the equivalent pore diameter of the capsule as the bridge. Through quantitative analysis, Under the pressure indicator, the change of the aerostat’s performance in the air can be extracted and the influence law can be extracted to provide a general reference for the reasonable design of the pressure maintaining indicator.