固体火箭发动机药柱表面缺陷的处理分析

Treatment Analysis of the Surficial Defect of Solid Rocket Motor Grain

为了分析发动机前翼槽、前伞盘、药柱中段、后伞盘和后翼槽表面划伤缺陷对发动机结构完整性的影响,结合工程实际中对划伤等药柱表面缺陷的铲槽处理方法,由无缺陷固体火箭发动机的结构完整性分析的结果,在发动机的危险部位设置划伤槽,在内压与轴向过载的作用下,用最大Von Misses应变准则评估发动机表面划伤时的结构完整性。

Based on the results of structure integrity of perfect solid rocket motor, the surficial nicks of ahead slot, ahead umbrella, midland, rear umbrella and rear slot of the motor grain are analyzed under the internal pressure and axial loading. Several different depths nicks are preset on the grain surface, the max Von Mises strain of the nick is obtained. The structure integrity of the defect motor grain is evaluated by using the Von Mises strain criterion.