基于湿热加速老化试验的HTPB固体推进剂寿命预估

Estimation of HTPB Solid Propellant Life Span Based on Hydrothermal Accelerated Aging Experiment

借鉴量子力学理论关于电子产品老化反应速率与环境温、湿度的关系,将Eyring和Arrhenius模型相结合,建立了固体推进剂贮存使用寿命的湿热老化模型,并通过试验数据拟合得到具体的经验公式。利用该模型预估出某HTPB固体推剂在室温20℃、相对湿度为50%的贮存寿命,与实际贮存寿命进行了对照。结果表明,采用将温湿因素引入推进剂老化模型的方法,可以使推进剂寿命预测的结果更接近于发动机中推进剂的实际使用寿命。

Based on the quantum mechanics theory on the relationship between the electronic equipment aging reaction rate and temperature-humidity , the solid propellant hydrothermal aging life span model was established by combined with the Eyring and Arrhenius aging model. Further more, experiential formula was obtained by fitting experimental datum. The HTPB solid propellant storage span under normal temperature 20℃ and humidity 50% was predicted by this formula,which was compared with actual storage span. The results show that the predicted service life of the propellant can be more similar to the actual service life by means of dynamics formula with temperature-humidity involved.