基于Kriging方法对固体火箭发动机装药结构可靠性进行了分析.首先,采用拉丁超立方抽样技术得到了随机参数样本点;然后,利用样本点数据对黏弹性有限元模型的装药进行了结构力学分析;最后,通过Kriging模型得到了八面体剪应变的函数近似响应面,并结合失效判据对失效函数进行了可靠性计算.为了验证Kriging模型在可靠性计算中的有效性,其计算结果与Monte-Carlo方法进行了比较,得到了十分接近的可靠度. Based on the Kriging method, the reliability of the charge structure of the solid rocket motor is analyzed.Firstly, the random parametric sample points are obtained by using the Latin hypercube sampling technique. Then, the structural mechanics of the viscoelastic finite element model is carried out by using the sample point data. Finally, the approximate response surface of the octahedral shear strain function is obtained by Kriging model, and the reliability of the failure function is calculated by combining the failure criterion.In order to verify the validity of the Kriging model in the reliability calculation, Monte-Carlo method has been compared to obtain a very close reliability.