摘要
为评估固体发动机药柱含内聚空洞时的结构完整性,通过在药柱后部不同应变梯度的部位设置不同直径的内聚空洞,基于三维黏弹性有限元分析方法,计算了在燃气内压和轴向过载作用下发动机的应变场。由不同直径内聚空洞的最大VonMises应变值随着直径变化的规律及最大VonMises应变准则判断出内聚空洞位于药柱不同位置时允许的最大直径.
Based on the structure integrity analysis of perfect solid rocket motor grain under internal pressure loading and axial acceleration loading, some positions are determined to presetting cohesive cavities in different strain grads of the rear motor grain. The three-dimensional viscoelastic finite element models of the motor grain with cohesive cavity are established. Under internal pressure loading and axial acceleration loading, the strain fields of the grain with cohesive cavity are studied. The maximum Von Mises strain of different regions and different diameter cohesive cavities are obtained. Then the allowable maximum diameter of the cohesive cavity could be determined by the maximum Von Mises strain criterion.
出处
《暨南大学学报（自然科学与医学版）》
CAS
CSCD
北大核心
2005年第1期64-68,共5页
Journal of Jinan University(Natural Science & Medicine Edition)
基金
湖南省自然科学基金(02JJY2009)资助项目
关键词
固体发动机
黏弹性
有限元法
结构完整性
内聚空洞
solid rocket motor
viscoelasticity
finite element method
structure integrity
cohesive cavity
