药柱结构对其抗轴向过载能力的影响

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。

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

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.