药柱结构对其抗轴向过载能力的影响  

Effects of the structure of grains on their capability of resisting axial acceleration load

作　　者：利凤祥[1] 刘中兵 李越森 胡春波[1] 

机构地区：[1]西北工业大学航天工程学院,陕西西安710072 [2]陕西动力机械研究所,陕西西安710025

出　　处：《推进技术》2004年第2期165-169,共5页Journal of Propulsion Technology

摘　　要：采用三维线性粘弹性模型,对构造的8个药柱模型分别进行有限元计算,得出了药柱在轴向过载作用下的变形结果,指出了药柱内危险部位的位置,分析了半径、长径比、翼槽结构对药柱位移、应力、应变场的影响,得到了轴向过载作用下缩比发动机药柱间变形的比例关系,为离心试验时小尺寸模拟发动机药柱的结构设计提供参考。Using three-dimensional linear viscoelasticity model, the finite element calculation of 8 grain models constructed was completed separately. The deformation results of grains under axial acceleration load were obtained. The location of critical parts in the grains was indicated. The effects of radius, length-to-diameter ratio, slots on the distribution of displacements, stress, strain of grains were analysed. The proportion relation of reduced scale grains with deformation under axial acceleration load was gained. It is helpful for the structure design of small dimension simulation engine grains for centrifugal test.

关 键 词：推进剂药柱 轴向过载 粘弹性 有限元法 离心试验 

分 类 号：V512[航空宇航科学与技术—航空宇航推进理论与工程]