固体火箭发动机药柱随机结构分析及其相关函数研究

利用粘弹性随机有限元法考虑固体推进剂药柱材料的随机性，结构几何形状的随机性以及随机载荷等，研究了复合因素下结构的随机应力场，讨论了不同的相关函数假设对粘弹性随机结构分析的影响。结果表明，同时考虑多种随机因素更多符合实际情况，药柱的随机应力、应变场对相关函数具有不敏感的特性。

Stochastic structral analys is and correlation-functions of sol id rocket motor grain

The random parameters, geometrical shapes and loads were very popular for solid rocket motor grain. Viscoelastic stochastic finite element methods were introduced to consider the above random factors. The stochastic structural integrity of solid propellant grain was analyzed. The influences of different correlation functions on viscoelastic stochastic structural analysis were discussed too. The results showed that it was preferable to consider all random factors at the same time. The random stress field of solid propellant grain had the feature of insensitivity to the correlation functions.