固体火箭发动机药柱概率贮存寿命预估

摘要

A probabilistic storage life prediction model of solid rocket motor ( SRM) grain is proposed based on the viscoelastic stochastic finite element method (SFEM) and the temperature accelerated aging test of solid propellant. The relationship between the digital characteristics of solid propellant property parameters of solid propellant and storage time is derived from the statistical analysis of aging test data, and the mean and standard deviation of grain structural response are calculated using 3D viscoelastic response surface SFEM. The structural reliability of a certain SRM grain at the different storage times is analyzed, and its probabilistic storage life is estimated. The methods are available for the designers and users of SRM.%基于粘弹性随机有限元法和固体推进剂高温加速老化试验,提出了固体火箭发动机( SRM)药柱概率贮存寿命预估模型.对老化试验数据进行统计分析得到了固体推进剂性能参数数字特征随贮存时间的变化规律,采用三维粘弹性响应面随机有限元法( SFEM)计算了药柱结构响应的均值和标准差,分析了某SRM药柱在不同贮存期的结构可靠度,并对其进行了概率贮存寿命预估.所提方法可为固体发动机研制和使用部门提供参考.