滚珠式打开机构失效模式仿真计算及试验验证

Simulation analysis and confirmation test to disabled schema of opening mechanism with balls

针对某固体发动机工作过程中滚珠式打开机构自锁结构失效问题,采用有限元方法进行仿真计算,分析了滑板中心轴偏斜不同角度情况下整个打开机构的承载能力变化情况,并采用气压模拟试验装置对仿真计算结果进行了试验验证。计算及试验结果表明,滑板中心轴偏斜角度越大,打开机构承压能力越低。该结果可为具有滚珠式打开机构的固体发动机完善失效模式。

Aiming at the opening mechanism with balls of solid-rocket-motor,the finite element analysis method was adopted to get the simulation analysis results. The changing history of whole opening mechanism＇s carrying capacity under the situation when the sliding plate＇s roller off tracked to different angle was analyzed. Moreover a new concert atmospheric-pressure confirmation test was performed to verify the simulation analysis results. The simulation computation and the confirmation test show that the bigger the off tracked angle of the sliding plate＇s roller is,the worse the carrying capacity of the opening mechanism will be. Such study results could provide reference for failure mode analysis for the solid-rocket-motor with opening mechanism.