固体推进剂药柱的近似不可压缩粘弹性随机有限元  

Structure dynamic reliability analysis of solid rocket motor viscoelasticity grains

作　　者：张书俊[1] 任钧国[1] 吴志桥[1] 

机构地区：[1]国防科技大学航天与材料工程学院,长沙410073

出　　处：《强度与环境》2006年第2期33-38,共6页Structure & Environment Engineering

摘　　要：采用Monte-Carlo粘弹性随机有限元法,分析了药柱的结构可靠度。针对固体火箭发动机药柱材料近似不可压缩的问题,基于Herrmann粘弹性有限元以提高计算的精度,考虑泊松比和松弛模量的随机性,采用拉丁超立方(LHS)技术计算了固体火箭发动机药柱结构的可靠度。算例表明该方法的有效性。Structure reliability of grain was analyzed based on Monte Carlo viscoelastic stochastic finite element method. Nearly incompressible viscoelastic finite element method, is applied to increase the accuracy. Considering the randomness of Poisson ratio and relaxation modulus, structure reliability and its variational trend of the solid rocket motor grain under internal pressure was analyzed in contrast to general method. The results of evaluated examples demonstrate that this method is effective.

关 键 词：随机结构 可靠度 蒙特卡罗方法 拉丁超立方体抽样 

分 类 号：V435[航空宇航科学与技术—航空宇航推进理论与工程]