药柱裂纹对固体火箭发动机工作过程的影响

Effect of Grain Crack to Solid Rocket Motor Performance

摘要:

针对某固体火箭发动机点火启动时所受的燃气载荷,用线性粘弹性有限元法分析了无缺陷药柱和含有裂纹药柱的应力—应变场,并探讨了单裂纹部位、裂纹尺寸对发动机工作安全性的影响以及多裂纹条件下,裂纹尺寸和相互位置对裂纹扩展的影响。所得到的结论对制定固体发动机失效判据有一定的参考价值。

Abstract:

The sacrificial cracks are easy to emerge in the solid rocket motor in its all life circle. To get the danger location of motor, a finite element method of viscoelastic is used to establish the model. The influence of the position and dimension of the crack on the grain is studied. The propagation property of the cracks and the interaction between cracks are studied. The conclusion is valuable for the constitution of abate criterion of SRM.