CAJ | 학술논문

针对某固体火箭发动机点火器加速老化后，在低温动力环境试验中部分产品的B/KNO 3点火药柱断裂现象，采用故障树法对断裂的原因进行了排查，并通过压力试验、强度仿真等方法对其进行分析。结果表明：药柱支撑体与装药管体间较大的间隙和药柱支撑体排列的不合理，导致药柱在振动过程中出现应力集中区域，从而产生断裂。因此，提出了消除间隙、增加支撑体、优化支撑位置等改进措施，验证试验表明改进措施消除了药柱断裂现象。
침대모고체화전발동궤점화기가속노화후，재저온동력배경시험중부분산품적B/KNO 3점화약주단렬현상，채용고장수법대단렬적원인진행료배사，병통과압력시험、강도방진등방법대기진행분석。결과표명：약주지탱체여장약관체간교대적간극화약주지탱체배렬적불합리，도치약주재진동과정중출현응력집중구역，종이산생단렬。인차，제출료소제간극、증가지탱체、우화지탱위치등개진조시，험증시험표명개진조시소제료약주단렬현상。
Aimed at the problem that the grain of SRM igniter after accelerated aging test was cracked during impact and vibration test at low temperature, the fault tree analysis was carried out, and the reasons were analyzed by the pressure test and strength simulation. The failure analysis results showed that the large clearance between lip block and igniter case, as well as the unreasonable arrangement of lip block, make the stress concentration and the crack of grain during the impact and vibration test. The improvement measures like eliminating the clearance, adding lip blocks and optimizing the position of lip blocks were put forward, and the verification test indicated that the measures eliminated the crack phenomenon.